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Argent Data Systems OpenTracker USB User`s manual
Argent Data Systems
OpenTracker USB
User’s Manual
Revised 2-25-2013
Argent Data Systems, Inc.
PO Box 579
Santa Maria, CA 93456-0579
USA
(800) 274-4076 / +1 805 619-4515
Fax (866) 302-6890
www.argentdata.com
Copyright © 2007-2013 Argent Data Systems
All Rights Reserved
APRS® is a registered trademark of Bob Bruninga, WB4APR
OpenTracker USB User’s Manual
1.
2.
3.
Introduction .............................................................................................................. 1
Major Features .......................................................................................................... 1
Hardware Description............................................................................................. 3
3.1. SERIAL Connector Pin Assignments ............................................................ 3
3.2. RADIO Connector Pin Assignments............................................................. 3
3.3. Internal Header CN4 ....................................................................................... 3
4. Jumper Settings ........................................................................................................ 4
5. Setup and Configuration......................................................................................... 5
5.1. USB Operation.................................................................................................. 5
6. Position Modes ......................................................................................................... 6
7. Port Modes ................................................................................................................ 6
AUTO............................................................................................................................. 6
KISS ................................................................................................................................ 7
WS2300 .......................................................................................................................... 7
DAVIS ............................................................................................................................ 7
FLOW............................................................................................................................. 7
8. Remote Access .......................................................................................................... 8
9. Safe Mode.................................................................................................................. 8
10.
Authentication.................................................................................................... 10
11.
OTWINCFG Configuration Program.............................................................. 11
11.1.
Overwriting an Invalid Configuration ................................................... 11
11.2.
Turbo Mode ................................................................................................ 11
11.3.
Auto-detect ports ....................................................................................... 11
11.4.
Warm Boot vs. Cold Boot.......................................................................... 12
11.5.
Working Offline ......................................................................................... 12
11.6.
Main Configuration Window................................................................... 12
11.7.
Configuration Profiles ............................................................................... 13
11.8.
Loading and Saving Settings.................................................................... 13
11.9.
Basic Configuration Options .................................................................... 13
11.10.
Tuning and Diagnostics ............................................................................ 19
11.11.
Access List ................................................................................................... 20
11.12.
Profile Switching ........................................................................................ 20
12.
Command Reference ......................................................................................... 22
13.
Telemetry............................................................................................................. 33
14.
Script System ...................................................................................................... 34
14.1.
Script Editor ................................................................................................ 34
14.2.
Script Commands....................................................................................... 36
14.3.
Counters ...................................................................................................... 38
15.
UI-View32 Setup ................................................................................................ 40
OpenTracker USB User’s Manual
1
1. Introduction
The OpenTracker USB was designed as a low-cost entry-level APRS tracker, but
it includes features previously found only on significantly more expensive
models.
The OpenTracker USB includes almost all of the features of the higher-end
Tracker2, with the exception of the digipeater and Garmin protocol functions.
Firmware updates and enhancements are published frequently, so check our
website at http://www.argentdata.com/support to make sure you have the latest
firmware and documentation. The Wiki site at http://wiki.argentdata.com also
has in-depth technical information and user-contributed tips and tricks.
2. Major Features
APRS Tracker - The OpenTracker USB is first and foremost a full-featured APRS
tracker. It works with GPS receivers using the industry-standard NMEA format
($GPRMC, $GPGGA, and $GPGLL sentences). In addition to transmitting its
own position, it can also decode incoming positions and plot them as waypoints
on the screen of a GPS receiver, selecting appropriate symbols and setting
comment text and other waypoint details if supported by the receiver.
KISS Mode - The KISS protocol defines an interface between a TNC and its host,
typically a PC. This mode allows the tracker to be used with PC-based APRS
programs like Xastir, WinAPRS, and UI-View32. It can also be used with nonAPRS applications, subject to the limitations of the tracker’s transmit and receive
buffers.
Weather Station – The OpenTracker USB can be connected to several models of
weather station, including the Peet Bros. Ultimeter 2000 series, Dallas/AAG 1Wire Weather Station, Davis VantagePro 2, and LaCrosse WS-2310 wireless
weather station, to provide remote weather telemetry.
Command Console – While the OpenTracker USB comes with a Windows-based
configuration program, it can also be configured, tuned, and upgraded through a
traditional console interface with command syntax similar to that of the classic
TNC2 and its clones. Keyboard-to-keyboard QSOs are supported through a
‘converse’ mode as well as APRS messaging commands.
OpenTracker USB User’s Manual
Telemetry – The OpenTracker USB has on-board temperature and voltage
sensors, plus four analog 0-20v inputs and two digital input/output pins.
Temperature and voltage readings can be reported in status packets, and the
other readings can be reported in an APRS telemetry message.
Scripting – To automate a variety of tasks and increase the device’s feature set,
the OpenTracker USB includes a simple user-programmable script system.
2
OpenTracker USB User’s Manual
3. Hardware Description
3.1.
2:
3:
4:
5:
7:
8:
SERIAL Connector Pin Assignments
Data in (port A)
Data out (port A)
Power output for GPS
Ground
Data out (port B)
Data in (port B)
Note: The serial interface is configured as DTE (data terminal equipment) to
allow direct connection to a GPS receiver. Connection to a PC requires a nullmodem cable.
3.2.
1:
2:
3:
5:
6:
7:
8:
9:
3.3.
1:
2:
3:
4:
5:
6:
7:
8:
RADIO Connector Pin Assignments
Audio out
COR / Squelch input
PTT out
Audio in
Ground
Power in (7 to 24 volts)
PTT in
AUX IO / GPIO1 / Power relay output
Internal Header CN4
+5 Volt power
1-Wire data bus
Analog input 1
Analog input 2
Analog input 3
Analog input 4
Digital input/output
Ground
3
OpenTracker USB User’s Manual
4
4. Jumper Settings
Three settings are controlled by the jumper block on the circuit board.
‘HI’ – This jumper sets the audio output level to the high range. This is needed
mostly for mobile radios, especially some commercial models.
‘HT’ – Selects if push-to-talk signaling through the audio output line is enabled.
Use this jumper with most HTs by Icom, Yaesu, and Alinco handhelds, but not
Kenwood, Puxing, and Baofeng.
‘Vout’ – Selects GPS output voltage on pin 4 of the serial connector. This is set to
5v by default. Valid positions are horizontal for 5v and vertical to pass the
OTUSB’s unregulated supply voltage (typically 12v) straight through to pin 4.
Use the 5v setting for all GPS receivers supplied by Argent Data Systems.
If you don’t expect to use a 12-volt GPS receiver, clipping the pin marked ‘12’ is
highly recommended to eliminate the possibility of accidentally setting the
jumper to the wrong position and destroying the GPS receiver.
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5
5. Setup and Configuration
You can use a PC to connect to the OpenTracker USB using either the Windows
configuration program (otwincfg.exe) or a terminal emulation program of your
choice, such as HyperTerminal, PuTTY, or Minicom. Either the serial port or the
USB port may be used for configuration.
To use the command console, connect at the proper baud rate (4800 baud is the
default) and press enter several times until you see a command prompt. To use
the Windows configuration program, simply start the program, select the COM
port, and power up the device.
The only setting absolutely required for normal APRS tracker operation is the
callsign. The defaults for all other settings should be reasonable, but you should
check on locally recommended settings, particularly for the digipeater path.
5.1.
USB Operation
The USB port can be used for configuring the tracker with the otwincfg.exe
utility, accessing the command prompt, and connecting to a PC in KISS interface
mode.
When the USB connection is in use, the tracker draws its power from the host
system - no other connections are required for configuration of the unit.
Note that the OpenTracker USB does NOT act as a host device - the USB port is
only used for connecting to a PC, and cannot be used to connect a USB GPS
receiver.
Windows systems require the provided .INF for the OpenTracker USB to be
recognized properly. Once installed, you can find the COM port number
assigned in Device Manager. Alternatively, you can plug in the USB port after
running otwincfg.exe and the new port should be detected automatically.
Modern Linux distributions should automatically assign a device name like
/dev/ttyACM0 to the OpenTracker USB. If the unit is not automatically
recognized, you can select the driver with the following command:
sudo modprobe usbserial vendor=0x134a product=0x9000
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Mac OS X should assign a device name starting with /dev/cu.usbmodem.
Other modern operating systems should be able to use the OpenTracker USB as a
generic CDC ACM serial device. Its VID is 0x134A and PID is 0x9000.
6. Position Modes
Before getting started, it’s important to understand that the tracker ordinarily
will not make automatic transmissions (including position, status, weather, and
telemetry packets) unless it knows where it is.
The device knows where it is when it receives a valid fix from a GPS receiver, or
when it’s programmed by the user with a fixed position. It can be configured to
transmit without a valid fix; if no fix has been received since power-up, only
status and telemetry packets will be sent. If the last valid GPS fix is more than 30
seconds old, a ‘NO FIX’ warning is added to each position packet.
If the AUTOSAVE option is enabled, as soon as the last valid fix is 30 seconds old,
that position is saved and the device enters fixed position mode. As soon as
another valid fix is received, it switches back to GPS mode. This is useful for
portable weather stations that will have a GPS receiver connected only briefly
during deployment.
7. Port Modes
The OpenTracker USB has two serial ports that share the same physical
connector. A ‘Y’ adapter is available to separate the ports if needed. Both ports
can operate in multiple modes:
AUTO – In this mode, the device will automatically detect NMEA GPS data, Peet
Bros weather data, or (for port A only) command console input. Note that while
both ports can be configured in AUTO mode, only one should be used for a
given function at any time. For example, port A can accept NMEA data while
port B accepts weather data, but providing NMEA data to both ports
simultaneously will cause unpredictable operation.
If the USB port is not in KISS mode, the command console will only be present
on the USB port while it’s connected. When the USB port is disconnected, the
console will default back to port A.
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KISS – In KISS mode, a PC or other host device sends and receives raw AX.25
packets. Keep in mind that even with one or both ports in KISS mode, the
tracker will continue to perform its other functions, including messaging and
remote command access. The host should use a different callsign/SSID
combination to avoid interference.
WS2300 – Supports LaCrosse WS-2300 series weather stations at 2400 baud,
again ignoring manual baud rate settings.
DAVIS – Supports Davis Vantage Pro series weather stations.
TEXT – Functions like ‘converse’ mode. Each line of text is sent as a plain text
packet when a carriage return is received. Pressing control-C twice will exit
TEXT mode.
FLOW – Valid only for port B, this setting causes the port B pins to function as
CTS/RTS flow control signals for port A.
The USB port has two modes, controlled by the ‘USB KISS’ option in
otwincfg.exe or the USBKISS ON/OFF option from the command console.
When USBKISS is ON, the USB port will operate in KISS mode. If the tracker
receives a KISS exit command from the host, USBKISS will be switched OFF.
With USBKISS OFF, the USB port functions as the command console. In both
modes, the baud rate setting has no effect on the serial link’s speed. Some
applications may make assumptions about timing based on the selected speed,
however, so it’s recommended that the baud rate be set to 115,200 bps or higher.
OpenTracker USB User’s Manual
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8. Remote Access
Commands can be issued to the tracker remotely via APRS messages. The
originating station’s callsign must appear in the device’s security authorization
list (see AUTHLIST command.) Commands are prefixed with ‘CMD’, and the
results of the command, if any, will be send back as an APRS message to the
sending station.
For example, ‘CMD VERSION’, sent from an APRS client, will cause the target
device to reply with its firmware version.
In response to a RESET command, the device will attempt to send one
acknowledgement before resetting. This is intended to prevent message retries
from causing multiple resets, but especially if the channel is busy there is a
possibility that the acknowledgement will not be sent before the reset is
executed. A RESET command should be cancelled after a few retries with no
response received to check if the device has indeed been reset.
9. Safe Mode
Starting with firmware build 56294, the OpenTracker USB includes a 'safe mode'
option to place the device temporarily into its default configuration. The safe
mode entry condition is checked only when the tracker first powers on or resets.
It should always be possible to recover from an invalid configuration using a
cold boot procedure over the serial interface. This procedure, however, can be
problematic with certain hardware setups. Safe mode offers an alternative to a
serial cold boot.
Safe mode is entered by connecting the digital I/O and 1-Wire bus pins (CN4 pins
7 and 2) together. Connect the pins with a short piece of wire or other
conductive item such as a pair of metal tweezers while the tracker powers up.
The tracker will blink its red LED five times to indicate safe mode entry and will
display *SAFE MODE* in the banner.
While in safe mode, the tracker will operate from a saved copy of the default
configuration, with ports A and B set to AUTO at 4800 baud. Changes to the
configuration will affect the normal configuration and not the saved defaults. To
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9
exit safe mode, use the RESET command or power off the tracker after removing
the jumper used to enter safe mode.
The use of the default configuration is temporary. Normal operation will be
resumed when safe mode is exited. To overwrite the active configuration with
the saved defaults, use the RESET DEFAULT command. The tracker need not be
in safe mode to restore defaults.
OpenTracker USB User’s Manual
10
10. Authentication
In addition to the security authorization list, remote access to the tracker can be
controlled through a more secure one-time password mechanism. This
mechanism is enabled by setting PWAUTH ON.
To set up one-time password authentication, use the command SECRET followed
by a pass phrase of at least 16 characters. The device will use this pass phrase to
generate a 128-bit key that is stored in nonvolatile memory. The password
sequence counter is set to 0 when the key is created.
The PASSLIST command can then be used to generate a list of 4-character one-time
passwords, each listed with a unique sequence number. These passwords must
be used in the specified order. You can print out this list and cross off each
password as it’s used.
cmd:secret The quick brown fox jumps over the lazy dog.
Set.
cmd:passlist 24
0:C0EP
1:U60T
2:8JES
3:BVBN
4:Z2ZC
5:TEAR
8:JCBX
9:NE8G
10:NAAM
11:P1Y8
12:ZJ59
13:H654
16:VM89
17:GTNW
18:CW52
19:B7ZX
20:X4DF
21:Z5HF
6:VA5S
14:KSBB
22:CNNU
7:EV1F
15:PDM8
23:A8FS
To use a password, append it to the CMD prefix at the start of the command
message. For example, if the next valid password is ‘SBCY’, the message
“CMDSBCY VERSION” will execute the VERSION command.
While it should be virtually impossible for someone to determine the next
password without knowing your pass phrase, the system is not foolproof. Be
sure not to use the same pass phrase on two different devices, because an
eavesdropper who hears a password used on one device (or who retrieves an old
message from an online database) could potentially use the same password on
the other unit.
Also, should a valid password be sent without being received by the target
device, an eavesdropper would know the next valid password. If you are unsure
of being able to reach the target device, send an unauthenticated message or
query first and make sure you get a reply.
OpenTracker USB User’s Manual
11
11. OTWINCFG Configuration Program
The OpenTracker USB can be configured using the otwincfg.exe program under
Windows. The program is available for download at
http://www.argentdata.com/support.
Connect the tracker and start the configuration program. The first window
displayed allows you to select the COM port that the tracker is connected to.
11.1.
Overwriting an Invalid Configuration
The ‘Erase device and load new firmware’ option will load a new firmware
image, using the default configuration settings, without attempting to read the
existing configuration first. This is particularly useful if the tracker has an invalid
or missing configuration.
11.2.
Turbo Mode
By default, the configuration program will attempt to connect at 115,200 baud. If
you have trouble connecting, use the ‘Disable Turbo’ option to force the program
to connect at 19,200 baud.
11.3.
Auto-detect ports
Selecting this option will cause the program to constantly scan all of the ports
and display which are available. Connecting the tracker via USB while this
option is checked will cause the program to automatically connect. On some
systems this option may cause trouble connecting; disable it if you experience
problems.
OpenTracker USB User’s Manual
11.4.
12
Warm Boot vs. Cold Boot
If the unit is already powered on and operating when you click the ‘Connect’
button, the program attempts a ‘warm boot’ operation to put the device into
configuration mode. If the firmware has been corrupted, i.e. by a failed upgrade,
it may fail to enter configuration mode. You can correct this by performing a
‘cold boot’ - power the unit off and power it on again after clicking ‘Connect’.
11.5.
Working Offline
If you need to edit a configuration without connecting the tracker, click the
‘Offline’ button. You will need to have a saved configuration file to work from.
11.6.
Main Configuration Window
OpenTracker USB User’s Manual
11.7.
13
Configuration Profiles
The OpenTracker USB can store two separate configuration profiles. The profile
currently being shown is selected using the tabs at the top of the window labeled
‘Profile 1’ and ‘Profile 2’.
When it is first powered on, the tracker will always start out using Profile 1.
After startup, profile selection depends on the settings in the profile switching
screen. To access these settings, click ‘Profile Switching’. See the section below
on profile switch for more information.
11.8.
Loading and Saving Settings
After changing any configuration options, you must click the ‘Write’ button to
write the changes to the tracker’s firmware. You may also use the ‘Save to File’
button to save the configuration options to a file, which can be loaded later using
the ‘Load from File’ button.
11.9.
Basic Configuration Options
Callsign – The radio callsign to use when transmitting. Tactical callsigns may be
used, but FCC and ITU rules require periodic identification. If the actual callsign
is not used here, be sure to include it in the comment field.
Baud Rate – For normal VHF operation this should be 1200. 300 baud is
commonly used for HF. The mark and space frequencies are 1600 and 1800 hz
respectively in 300 baud mode.
Path – This specifies the digipeater path to use. Specific callsigns may be entered
(e.g., ‘K6SYV-10, K6TZ-10’) but for APRS operation a set of common aliases are
usually used. A suggested default path is ‘WIDE1-1, WIDE2-1’. It is rarely
necessary to use a path greater than WIDE3-3 (requesting three ‘wide’ digipeater
hops), and excessive paths generate large amounts of traffic that degrade the
performance of the network. If you’re not sure what path should be used for
your local area, check with a local digipeater operator. This field may be left
blank.
Alternate Paths - When enabled, this option causes the tracker to alternate
between the paths specified in either profile with each transmission.
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Symbol Table and Symbol Code – These settings control the symbol used to
indicate the station’s position when drawn on a map. See Appendix B for a
listing of available symbols.
Temp. Adjust – Calibration offset for onboard temperature sensor. The sensor
used on the OpenTracker is fairly linear across its operating range and requires a
single-point calibration. The easiest way to accomplish this is to set a
thermometer next to the tracker. Subtract the temperature reported by the tracker
from the temperature shown by the thermometer, and enter that value in this
field. For example, if the thermometer shows the temperature as 26°C and the
tracker reports 29°C, enter –3 for the adjustment value.
Quiet Time – This setting determines how long the channel must be clear before
the tracker will transmit. Each unit is approximately 1/56 second. Setting the
quiet time to zero causes the tracker to ignore detected traffic.
Text – This is a freeform text field. Anything entered here will be displayed in
the comment portion of the transmission or in a separate status packet, as
selected. Keep comments as brief as possible to avoid wasting channel capacity,
or use the ‘Every __ Transmissions’ option to reduce how often the text is sent.
Altitude, Course/Speed, Time – When checked, report these values as indicated
by the GPS receiver. The timestamp may be in Days/Hours/Minutes or
Hours/Minutes/Seconds.
DAO – Enables the proposed !DAO! APRS extension to provide the map datum
used and an extra digit of latitude and longitude resolution. May not be
supported by all APRS clients. The datum is always reported as WGS84, which
is the standard for normal APRS operation.
GPS Quality – Report number of satellites in use and horizontal dilution of
precision information as reported by the GPS receiver.
Temperature – Report temperature as indicated by the onboard temperature
sensor in the comment field, in degrees C. Not affected by the Metric / English
setting.
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Voltage – Report input voltage in the comment field. The maximum value is 18.5
volts, and the minimum is the dropout voltage of the regulator – typically 6.7
volts.
Compressed – Enables Base91 compressed position reporting. This mode is
widely, but not universally, supported. Packets in Base91 format are shorter
than their uncompressed equivalents and provide greater position resolution.
Telemetry every n – Sends a telemetry packet every n transmissions. See the
telemetry section for more details.
TX Interval – How often the tracker should transmit. Allowable values are 0 to
65,535 seconds. This setting will depend on your intended use. One transmission
every two minutes is acceptable for most mobile stations. A fixed station (e.g., a
solar powered site reporting battery voltage and temperature) might choose an
interval in the range of 5 to 30 minutes. If you require transmissions more often
than every two minutes or so, consider using the SmartBeaconing™ options
detailed below. Special events with many trackers and short transmission
intervals should be operated on a separate frequency, not on the shared APRS
channel. An interval of zero will disable timed transmissions.
SmartBeaconing – Originally developed for the HamHUD by Tony Arnerich,
KD7TA, and Steve Bragg, KA9MVA, the SmartBeaconing™ algorithm allows the
tracker to operate more efficiently by changing how often it transmits depending
on its speed and direction of travel.
When stopped or moving at a speed below the low speed setting, the tracker will
transmit at a fixed rate determined by the lower rate setting. Above the specified
high-speed threshold, the higher rate setting is used. Between these two
extremes, the interval varies between the low and high rates depending on the
speed. A turn angle can also be specified to cause the tracker to transmit when
turning. The final setting ensures that the tracker will never transmit more often
than the specified interval, regardless of speed and turn rate. This can be useful
to avoid transmitting more than once in a long, shallow turn.
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Use PTT Input – When this checkbox is enabled, the tracker can be connected
inline with a microphone to operate in burst-after-voice (mic encoder) mode. A
packet will be transmitted whenever the microphone PTT is released.
Timeslot – The timeslot option is typically used to coordinate multiple trackers,
especially for special events where many transmitters will be sharing the same
channel with a high beacon rate. The number entered selects the timeslot’s offset,
in seconds, from the start of the hour. The tracker will transmit at this time, and
every transmit interval after that. The timeslot value should be smaller than the
transmit interval.
As an example, two trackers could be configured with an interval of 10 seconds,
with one tracker set to slot 0 and the other to slot 5. The first tracker would
transmit at 12:00:00, 12:00:10, 12:00:20, and so on, while the second would
transmit at 12:00:05, 12:00:15, and 12:00:20.
Position – The tracker can operate in GPS or fixed position mode. When
entering a fixed position, enter degrees in the first box and decimal minutes in
the next box. Click on the buttons next to the coordinates to select North/South
and East/West.
Don’t require GPS fix – Normally, while in GPS mode, the tracker will not
transmit without a valid fix. When this option is selected, the tracker will
continue to transmit its last known position if GPS lock is lost for more than 30
seconds. This condition is indicated by the text ‘NOFIX’ in the status message. If
the tracker has received no valid fix since startup, no position will be reported.
Status text and telemetry packets will be unaffected. This option is particularly
useful for applications like high altitude balloons that may lose GPS lock after
landing, but still need to transmit to be found.
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Save – When enabled, the tracker will save its last-known GPS position as a
permanent fixed position if the GPS fix is lost. This may be used in the case of a
temporary weather station where a GPS receiver is installed only during setup
and is removed to conserve power. The system must remain powered on for 30
seconds after GPS fix loss before the position is saved.
Waypoint Output – Enabling the waypoint output option causes the tracker to
parse received APRS positions and output them over the serial port at 4800 baud.
Waypoints are provided in both NMEA 0183 format ($GPWPL sentence) and
Magellan format ($PMGNWPL sentence).
Length Limit – Some GPS receivers are not capable of display the full 9
characters required for APRS call signs and object names. Setting this option to a
smaller number causes the tracker to intelligently truncate the name of the
waypoint. Spaces and dashes are eliminated first, and if further truncation is
required, characters are dropped from the left first. This prevents stations with
different SSIDs from conflicting – for example, with a limit of 6 characters,
KB6YUO-12 and KB6YUO-6 would be truncated as 6YUO12 and B6YUO6
respectively.
Use Custom Symbols - Enables the use of custom symbols if they have been
uploaded to a compatible Garmin GPS receiver (using the Garmin xImage
utility).
Range Limit - When enabled, waypoints will only be created for stations and
objects within the specified range.
Enable Counter – This checkbox enables the digital counter function. When this
function is enabled, the tracker will no longer transmit immediately when X1 pin
4 is shorted to ground. Instead, it will increment a counter and include the
current count in the status text, e.g., ‘CNT00001’. The maximum count is 65535,
after which the counter rolls over to zero. This option can not be used
concurrently with profile switching with the ‘jumper’ option.
Reset on Transmit – Setting this checkbox causes the counter to reset with every
transmission. Hence, the count reported is the number of events since the last
transmission.
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Debounce – This is a delay applied to the counter input. After a counter event is
registered, all subsequent events are ignored until the specified time has elapsed.
Without a suitable debounce setting, a typical pushbutton could register several
events for one press.
Power Control – When selected, the tracker will activate its power control line
(AUX IO) before each transmission. The tracker will pause for the specified
number of seconds to give the transmitter time to power up. The power control
feature is especially useful for solar-powered weather or telemetry stations.
TX Audio Level – This slider sets the audio output level. This level can be set
interactively from the Tuning/Diagnostics screen. If you find that the required
level is less than one quarter of the full scale, make sure you have the ‘HI’ jumper
removed. Running with the audio level set in software to a very low level can
increase DAC quantization noise.
TX Delay – All radios require a certain amount of time to stabilize on their
transmitting frequency, and receivers also require time to lock on. This value
specifies the number of milliseconds the tracker should wait after the start of the
transmission before it begins sending data. Allowable values are 0 to 1023
milliseconds. Setting this value too high will keep the channel busy longer than
necessary. Setting it too low will prevent packets from being transmitted
properly. Finding the optimum value for your radio may require some
experimentation.
Don’t transmit if supply < n – To avoid over-discharging batteries, enable this
option and enter the minimum voltage at which the tracker should operate the
transmitter.
Invert Carrier Detect – Usually used with mobile radios, this checkbox indicates
that the channel is busy when the carrier detect input is low.
Software DCD – This option selects the data carrier detect (DCD) mode used.
When unchecked, the tracker considers the channel to be busy in the presence of
any noise, including voice or static. When checked, the channel is considered
busy only when a valid 1200 baud signal is present.
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No Suppress PTT Out on PTT In – This option allows the tracker to be used in
burst-after-voice mode without breaking any lines between the microphone and
radio. PTT is not asserted by the tracker until the microphone PTT is released.
External Squelch – Enables the use of an external squelch or COR input.
Copy from Profile n – This button copies the contents of one profile to the other.
11.10. Tuning and Diagnostics
Access the tuning and diagnostics screen with the ‘Tuning/Diagnostics’ button.
From this screen, you can exercise the tracker hardware and set the audio level.
The top row of buttons controls the red and green elements of the ACT LED, the
PTT output, and the power relay, and the second row allows AFSK tones to be
sent, either with or without PTT on. When both tone buttons are on, the tracker
sends alternating mark/space tones at the specified baud rate. The ‘Sensors’ pane
shows the raw readings from the on-board sensors. The temperature reading is
shown without the calibration constant applied.
Use the RX Gain setting and your radio’s volume adjustment to keep the
received audio level (indicated by the blue bar) between 50% and 100% of full
scale when the radio is receiving a packet.
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11.11. Access List
This screen allows editing of the tracker’s remote access control list.
11.12. Profile Switching
To access the profile switching setup, click on the ‘Profile Switching’ button from
the main configuration screen.
The conditions to test are selected using the checkboxes to the left of each
condition. The comparison can be either ‘>’ (greater than) or ‘<=’ (less than or
OpenTracker USB User’s Manual
21
equal to). Clicking on the button showing the comparison operator toggles it
between these two settings.
The Altitude and Speed values are compared with those indicated by the GPS.
Onboard sensors provide readings for comparison with the Temperature and
Voltage fields. ADC Input refers to the extra unused analog-to-digital converter
input on X1 pin 9. The possible values are 0 to 255, corresponding to a range of 0
to 20 volts. The ‘jumper’ setting refers to the state of the CFG input on the
accessory port (CN4 pin 7). The input is ‘Off’ when the CFG pin is pulled to
ground, as through a toggle or pushbutton switch. The GPS Fix is considered
invalid if it has been more than 20 seconds since the last valid position was
received from the GPS unit.
The selected tests are run once every second. If the conditions are met, the new
profile is loaded. If Transmit when switching to this profile is checked in the new
profile, a packet is transmitted immediately.
If the conditions in both profile panes are met, the tracker will switch between
the two profiles each second and may cause undesired operation.
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12. Command Reference
Most commands can be issued through the serial console, APRS message, or fleet
management message. Some commands make sense only when used from the
local console and are not available for remote access.
The OpenTracker USB will accept command abbreviations. A minimum of three
characters must be entered. For example, CALIBRATE can be entered as CAL.
AUTOBAUD can be entered as AUTOB, the additional characters being required to
distinguish it from AUTOSAVE.
Many commands return values in the script engine’s ‘Result’ variable. On/Off
commands return 1 for ‘On’ and 0 for ‘Off’. Numeric settings return the value of
the setting. Other return values are documented below in italics.
1WIREWX
Enables 1-Wire Weather Station mode. The TAI8515 weather station
should be connected to the 1-wire pin on header CN4.
ABAUD 1200 | 2400 | 4800 | 9600 | 19200 | 38400 | 57600 | 115200
Sets baud rate for the primary serial port. Default is 4800 baud.
Return value: 99 = invalid setting, 0-7 = 300 to 115200 baud
ALTITUDE on|off
Report altitude in position packet.
ALTPATH on|off
Causes the tracker to alternate between the digipeater path entries in
either profile with each transmission.
AMODE AUTO | KISS | WS2300 | DAVIS
Sets mode for primary serial port. See ‘Port Modes’ above for more
information.
ANALOG <n>
Returns the current reading for the specified analog input pin. See the
telemetry section of this manual for details on pin assignments. This
command is used primarily for scripting.
Return value: Current analog reading for specified pin
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AUTHLIST +/-<callsign>
Displays or changes the list of callsigns authorized for remote access.
+callsign adds a callsign to the list, -callsign removes a callsign from the
list, and 'none' erases the entire list. Up to six callsigns can be stored.
AUTOBAUD on|off
Enables automatic baud rate detection. When a baud rate mismatch is
detected, the unit will attempt to automatically select the proper baud
rate.
AUTOSAVE on|off
When enabled, the tracker will save its last-known GPS position as a
permanent fixed position if the GPS fix is lost. This may be used in the
case of a temporary weather station where a GPS receiver is installed only
during setup and is removed to conserve power. The system must remain
powered on for 30 seconds after GPS fix loss before the position is saved.
BBAUD 1200 | 2400 | 4800 | 9600 | 19200 | 38400 | 57600 | 115200
Sets baud rate for the secondary serial port. Default is 4800 baud.
Return value: 99 = invalid setting, 0-7 = 300 to 115200 baud
BEACON [text]
(local only)
If no beacon text is specified, a position beacon (and weather beacon, if
applicable) will be queued for immediate transmission. If a text string is
entered, that text will be transmitted as an AX.25 text packet.
The command ‘BEACON W’ will transmit only a weather packet, and
‘BEACON P’ will transmit a position packet.
BMODE AUTO | KISS | WS2300 | FLOW | DAVIS
Sets mode for secondary serial port. See ‘Port Modes’ above.
CALIBRATE LOW | HIGH | ALT | PACKET
(local only)
Calibration functions to set demodulator tuning and transmitter
deviation. 'Low' transmits a 1200 hz tone, 'high' transmits a 2200 hz tone,
'alt' transmits alternating 1200 and 2200 hz tones, and 'packet' sends a test
packet repeatedly. Use the '[' and ']' keys for coarse adjustment of the
transmit audio level, and '-' and '+' for fine adjustment. Press any other
key to exit calibration mode.
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CDINVERT on|off
Inverts carrier detect input polarity.
CNTRESET on|off
Causes counter to reset with each transmission. See accessory port
information.
COMMENT <string>
Sets beacon text / comment string, up to 64 characters.
COMPRESS on|off
Enables Base91 compressed format for position transmissions.
CONFIG 1|2
Selects configuration profile to modify.
(local only)
CONVERSE
(local only)
In converse mode, text entered at the console is transmitted when the
ENTER key is pressed. Hit CTRL-C to exit. The command ‘K’ may also
be used to enter CONVERSE mode.
COUNTER on|off
Transmits counter value in status text.
CUSTSYM on|off
Enables the use of custom symbols if they have been uploaded to a
compatible Garmin GPS receiver (using the Garmin xImage utility).
CWBEACON <text>
Sends <text> as a Morse code beacon.
(local only)
DAO on|off
Enables transmission of the !DAO! extended-precision construct. This
provides an extra digit of precision over the standard APRS position
format, but results in a longer packet and may not be supported by all
APRS clients.
DEVLIST
Lists addresses of all connected 1-wire devices.
(local only)
OpenTracker USB User’s Manual
Return value: Number of devices detected
DISPLAY
Lists all configuration parameters.
25
(local only)
DOUBLE <n> on|off
When enabled, two identical copies of the position packet are sent with
each transmission. This should only be used with short packets when
extra redundancy is required.
DUMP
(local only)
Displays the tracker’s memory contents for troubleshooting purposes. By
default only RAM contents are displayed. DUMP CONFIG displays
configuration memory contents, and DUMP ALL displays everything.
EXTSQL on | off
Enables external squelch input.
EXTTEMP on | off
Enables temperature reporting from an external DS18S20 temperature
sensor connected to the 1-wire data bus..
FAHRENHT on|off
Reports temperatures in Fahrenheit when temperature output in the
status text is enabled.
FILTER on | off
When FILTER is ON, the MONITOR command will only output printable
characters.
GPSDATA on|off
Reports GPS quality data in status text, including horizontal dilution of
precision (HDOP) and number of satellites used (SATS).
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GPIO <n> on | off | toggle | in
Reads or sets state of a general-purpose digital I/O pin. ‘On’ sets the pin
to the high state, ‘Off’ sets it to low state, ‘Toggle’ reverses the state of the
pin, and ‘In’ switches the pin to input mode and returns 1 or 0 depending
on the input signal. This command is used primarily for scripting. Pin
output state settings are not retained when power is lost. See the
telemetry section of this manual for details on pin assignments.
Example: GPIO 1 ON
Return value: 0 or 1 depending on input signal
HALFSLOT on|off
When timeslotting is enabled, HALFSLOT adds ½ second to the slot time.
HBAUD 1200|300
Selects transmission baud rate. Note that the reception baud rate is fixed
at 1200 baud.
HEADERLN on|off
Breaks MONITOR packets into two lines, with header and payload
separated.
INFO
Displays general system and diagnostic data, including number of packets
heard, buffer overruns, and frame check sequence errors detected.
INTERVAL <0-65535> (seconds)
Sets the interval between automatic transmissions.
LVINHIBIT <0-255> (* 0.0784 volts)
Sets the low-voltage inhibit threshold. When the supply voltage drops
below this level, the unit will cease transmitting. Each unit is 0.0784 volts,
so a setting of 100 equals 7.84 volts.
MAXRANGE <0-255> (miles)
When set to a non-zero value, waypoints will only be created for stations
and objects within the specified range.
MONITOR on|off
Displays incoming packets on the console as they are received.
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MYCALL <xxxxxx-nn>
Sets the unit's callsign and optional SSID.
NICE <n>
When the tracker hears one of its own packets digipeated, it will skip the
following <n> transmissions. This allows a faster beacon rate to be used in
areas with poor coverage, without increasing the load on the network in
areas with better coverage.
OUTPUT1 on|off
Not currently implemented.
PASSALL on|off
Normally the tracker ignores all received packets that fail a frame check
sequence test. PASSALL disables the FCS test. This option should only be
used for troubleshooting as it will result in output of corrupted packets.
PASSLIST [n]
(local only)
Generates a list of the next n one-time passwords to be used, based on the
pass phrase entered with the SECRET command. Default is 144.
PATCH <hex string>
The patch command allows direct modification of the contents of the
tracker’s flash memory. This command should only be used as directed
by the manufacturer. Improper use of this command may render the
tracker inoperable.
PATH <call1,call2,…>
Comma-separated digipeater path list, containing up to three digipeater
addresses.
POSITION <hhmm.mmx hhhmm.mmx> | GPS
Sets fixed position or enable GPS. Position must be entered in degrees
and decimal minutes, including leading zeros. Setting position to 'GPS'
reverts to GPS tracking mode.
Example: POSITION 4851.49N 00217.66E
Return value: 0 = Using GPS, 1 = Fixed Position, 2 = Position Unknown
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POWER on|off|<0-255> (seconds)
ON or OFF will manually set the state of the power relay control pin (AUX
IO). Specifying a value in seconds will enable automatic power control
mode, where the power output is turned on for the specified number of
seconds prior to transmission, and turned off immediately after
transmission.
Return value: 0 = Off, 1 = On, 2 = Timed
PROFILE 1 | 2
Selects the configuration profile to use.
PROPWPT on|off
Enables proprietary waypoint strings. With PROPWPT OFF, output formats
are $GPWPL and $PGRMW. With PROPWPT ON, $PKWDWPL, $GPWPT,
and $PMGNWPL are output.
PTTINPUT on|off
Enables PTT input for mic encoder opration. A position packet will be
transmitted when the mic PTT is released.
PULSE <0-255> (seconds)
Activates power output for specified duration.
PWAUTH on|off
Enables one-time password authentication.
QUIET <0-255>
Time channel must be free before transmission can occur, in 1/64 second
units.
REARM <0-255> (milliseconds)
Specifies minimum time between counter inputs. May be used for switch
de-bouncing.
REPLY <message>
(local only)
Sends a text message to the last person who sent a message addressed to
this unit's callsign
RETRIES <0-255>
Number of times to retransmit an outgoing message.
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RETRYTIME <0-255> (seconds)
Time between message retry attempts - interval increases by this value
with each transmission.
REQALL on|off
Require all configuration switch parameters to be met before switching
profiles.
RESET
Perform software reset. Saved settings are unaffected.
RING on|off
Sends a bell character whenever an incoming message arrives.
SCRIPT on|off
Enables the script engine.
SECRET <pass phrase>
Sets the pass phrase for the one-time password authentication system.
SEND <callsign> <message>
Sends a text message to the designated recipient.
(local only)
SHAREDPTT on|off
Controls PTT line behavior for mic encoder mode. If enabled, PTT output
is not asserted until the PTT input is released.
SLOT <0-65535>
Time slot for transmission (if TIMESLOT is on). Slot position is counted in
seconds from the start of the hour.
SMARTBCON <low speed> <high speed> <low rate> <angle> <time>
Configures SmartBeaconing. The SmartBeaconing algorithm allows the
tracker to operate more efficiently by changing how often it transmits
depending on its speed and turn rate.
When stopped or moving at a speed below the low speed setting, the
tracker will transmit at a fixed rate determined by the lower rate setting.
Above the specified high-speed threshold, the higher rate setting is used.
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Between these two extremes, the interval varies between the low rate and
high rate (specified separately with the INTERVAL command) depending
on the speed.
The <low speed> and <high speed> settings define these two limits. For
storage efficiency, the speeds are represented in units of 32
centimeters/second. To convert from miles per hour, multiply by 1.397.
To convert from kilometers per hour, divide by 1.152.
Setting
MPH
Km/h
5
3.6
5.7
10
7.2
11.5
15
10.7
17
25
17.9
29
40
28.6
46
60
43
69
80
57
92
100
71
115
<low rate> and <high rate> are specified in seconds. <angle> indicates the
change of direction, in degrees, that will cause an immediate transmission.
<time> specifies, in seconds, the minimum time required between
transmissions, regardless of speed or turns.
SNOOP [hex]
(local only)
The SNOOP command outputs on port A each character received on port B
until another key is pressed. Use this command to troubleshoot GPS and
weather station connections on port B. Make sure port A’s baud rate is
equal to or greater than port B’s baud rate.
SQUAWK <0-255> (seconds)
Transmits alternating tones for specified number of seconds. May be used
for testing or direction finding.
SWDCD on|off
ON selects software data carrier detect mode, providing a channel busy
indication only when data is present. OFF selects energy detect mode,
which will provide a busy indication for any signal, including static or
voice.
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STATUS <0-255>
Status packets are sent every n transmissions, or if set to 0, status text is
sent as part of the position packet.
SYMBOL <1-2 characters>
APRS symbol character, optionally preceded by symbol table or overlay
identifier.
TELEMETRY on|off
Enables transmission of telemetry packets.
TEMP on|off
Enables transmission of temperature readings from the on-board
temperature sensor.
TEMPADJ <-128 to 127> (degrees C)
Offset for temperature sensor in degrees C.
TIMEHMS on|off
Sets timestamp mode to hour/minute/second when enabled. Default is
day/hour/minute.
TIMESLOT on|off
Force position packets to be transmitted only in designated time slots,
expressed as the number of seconds from the start of the hour to the first
transmission.
TIMESTAMP on|off
Report time information in the position packet.
TRACE on|off
(local only)
When trace is on, each received raw packet is output in hexadecimal on
the active console port.
TXDELAY <0-255>
Delay between start of transmission and start of data. This setting should
be set to the minimum value that allows reliable reception of transmitted
packets. An excessively high TXDELAY setting wastes channel capacity.
Each unit is one character time – 1/150 second at 1200 baud.
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TXLEVEL <1-255>
Sets transmission audio level. This value should be selected to provide an
appropriate FM deviation level, typically about 3.5 kHz.
TXNOFIX on|off
Allows transmission of last position if GPS fix is lost for more than 30
seconds. Default behavior is to cease transmitting the position in the
absence of a valid GPS signal.
TXONCHG on|off
Causes an immediate transmission when switching configuration profiles.
VELOCITY on|off
Enables transmission of velocity (course and speed) information in the
position packet.
VERSION
Displays firmware version number.
VOLTAGE on|off
Enables reporting of supply voltage in status text.
WAYPOINTS on|off
Enables output of waypoints from received positions.
WPTLEN <6-9>
Sets maximum waypoint name length.
WXINFO
Displays weather information from attached station.
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13. Telemetry
The OpenTracker USB has the ability to send telemetry information from its
onboard temperature and voltage sensors, and header CN4 provides four 0 to 20
volt analog inputs and one general-purpose digital input/output pin.
When telemetry reporting is enabled, the tracker transmits standard APRS
telemetry reports in the following format:
T#sss,aaa,bbb,ccc,ddd,eee,76543210
The ‘sss’ field is a sequence number that increments with each report. Fields
‘aaa’ through ‘eee’ encode five channels of analog readings from 0 to 255, and
fields 7 through 0 are binary bits, either 0 or 1, representing digital inputs.
The ‘aaa’ field represents the tracker’s supply voltage, and fields ‘bbb’ through
‘eee’ correspond to inputs A1 through A4 respectively. All voltages are reported
in 1/10 volt units.
Digital bit 1 reflects the state of the tracker’s GPIO pin (CN4 pin 7), and bit 0
indicates the configuration profile currently in use.
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14. Script System
The OpenTracker USB’s script engine allows simple programs to be run on the
tracker to customize the tracker’s operation and automate tasks. Use the ‘script’
button in the otwincfg utility to access the script editors.
Common script tasks include handling multiple beacon texts, responding to
events such as door alarms or high temperatures, transmitting APRS objects or
telemetry parameters, and changing regional settings automatically. Detailed
information on all script commands and additional example scripts can be found
at wiki.argentdata.com.
14.1.
Script Editor
Scripts are created in otwincfg and uploaded to flash memory in the tracker.
When the SCRIPT option is enabled, the script is executed 8 times per second. If
the 'Quick' command is used in the script, the script will execute again in one
timer tick – 1/1200 second on the Tracker3.
Scripts cannot be remotely edited directly, but the script editor can generate a list
of PATCH commands that will allow a prepared script to be uploaded to a
remote tracker. Make sure the SCRIPT option is turned off while the script is
being uploaded. Turn the script option on, when you are ready to run scripts.
The editor screen is divided into three main parts. The top left portion is the
script listing, the bottom left portion allows data entry, and the right side
provides buttons for all script commands.
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35
The highlighted line in the script listing shows where the next command will be
inserted. The 'Delete Line' button deletes the currently selected line, and the 'Up'
and 'Down' buttons move the line in the listing. Conditional commands cause
automatic indentation in the listing. The numbers directly under the listing show
the amount of script memory used.
Commands that accept one or more parameters use the values in the A, B, C, T,
X, Y, area corners, and flags fields. A and B allow selection of three generalpurpose 16-bit counters that are used only within the scripting engine, as well as
a number of other system variables. C allows entry of numeric constants, T is for
text entry, the area corners allow a geographic area to be defined in terms of
northwest and southeast corner coordinates, and the flag checkboxes represent
"set", "clear", and "don't care" states.
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To compare the current altitude to a fixed value, for example, you can select
"Altitude" in box A and enter "10000" in box C, and click the "If A > C" button to
create the line "If Altitude > 10000". The next command entered will be indented,
indicating that it will only be executed if that condition is true. The "End Block"
command ends the conditional statement. "Else" reverses the sense of the last
conditional statement and should be used before the closing "End Block".
14.2.
Script Commands
Do Once
This command is used in conjunction with a conditional statement to execute a
block of code once once for each time that the condition becomes true. This
makes it very useful for ensuring that a command is not executed repeatedly.
The "Do Once" command can be used at most 16 times in one script.
Macro T / Macro Out
The following block is executed when the command named in T is entered at the
command line, through the FMI interface, or by APRS message. The Macro Out
command responds to the macro through the same channel
If In Area
Executes the following block if the tracker's current location is within the defined
geographic area. Coordinates are entered in degrees and decimal minutes, but
are displayed in decimal degrees.
If Profile 1 / If Profile 2
Executes code based on the currently active profile.
If A = B / If A < B / If A > B
Compares two 16-bit counters.
If A = C / If A < C / If A > C
Compares a counter to a constant value.
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On Startup
Executes a block of code only once, immediately after the tracker is powered on.
On Second
Executes a block of code once per second.
On Interrupt
Executes a block of code whenever a low-going edge is detected on the CT
(counter/trigger) pin.
On GPS Fix
Executes the following block whenever a valid GPS position fix is obtained.
Set A = B
Sets a counter to the value in another counter.
Set A = C
Sets a counter to the value specified in box C.
Increment A / Decrement A
Increments or decrements the specified counter by one.
Port A Print / Port B Print
Sends a string to the specified serial port.
Execute T
Executes the text in T as if it was entered at the command line. The command’s
return value will be stored in the ‘Result’ variable.
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Use this command carefully - the tracker's flash memory has a write endurance
of about 100,000 cycles, and any command that changes a value in the tracker's
configuration will require a flash write. At 8 script executions per second, an
errant script could wear out the flash memory in a few hours. Flash writes also
cause the received packet buffer to be discarded. Use flags or ‘Do Once’ to avoid
executing the same command repeatedly.
Quick
Causes the script engine to start again in 1/1200 second instead of 1/8 second.
This can be useful when higher timing resolution is required.
Peek C&X=Y?
Reads the contents of memory location C, performs a logical AND with X, and
compares the result to Y. Use of this command requires knowledge of the
tracker's memory map.
Poke C,X&Y
Sets the contents of memory location C with the value in X, using Y as a bit mask.
Set Flags / Toggle Flags / Clear Flags
Sets, toggles, or clears the selected flags.
If Flags
Executes the following code block if the flags match the specified pattern. A
grayed-out checkbox indicates a "don't care" condition. This is shown in the code
listing with an 'x'.
14.3.
Counters
Three general-purpose counter variables are reserved for scripting use, and other
system values are also accessible. All counters are unsigned 16-bit integers, and
will wrap from 65535 back to 0.
Counter 1 - Counter 3
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39
These general-purpose counters have no predefined meaning, and they have no
effect on the rest of the system.
Ticks
This counter increments every 1/1200 second, and counts from 0 to 1199.
TX Counter
Seconds elapsed since the last automatic transmission.
Second
This counter indicates the second of the current hour (synchronized to GPS time)
from 0 to 3599.
Pulse Count
This counter is used by the event counter function described elsewhere in this
manual.
Last Digi
Seconds elapsed since the tracker last heard one of its own packets repeated by a
digipeater.
Last Fix
Seconds elapsed since the last valid GPS position fix was received.
Altitude
Current altitude reported by the GPS receiver. Units are 2.56 meters, and 0
indicates an altitude of -10,000 meters. Thus, a value of 5097 is approximately
10,000 feet or 3,048 meters ((3,048 meters + 10,000) / 2.56 = 5096.875).
Result
Return value of the last command line command executed.
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15. UI-View32 Setup
For use with the UI-View32 APRS client, either port of the tracker can be set
manually to KISS mode. No configuration commands are needed in UI-View32
once this has been accomplished.
In this example, port A has been set to KISS mode at 9600 baud using the tracker
configuration utility. The console commands AMODE KISS and ABAUD 9600
produce the same result.
The baud rate selected in the UI-View32 ‘Comms Setup’ screen must match the
rate selected for the port in use. Select host mode ‘KISS’, and be sure to choose
the correct COM port for your PC. Click on ‘Setup’ to continue configuration.
OpenTracker USB User’s Manual
41
No ‘Into KISS’ or ‘Exit
KISS’ commands are
needed, and any settings
in these fields should be
deleted. Placing a ‘0’ in
the ‘Exit KISS’ field avoids
a bug in UI-View32 that
prevents it from exiting
properly when the option
is left blank.
If you would prefer to have UI-View32 automatically reconfigure the tracker for
KISS mode each time the program is started, use the following settings:
This configuration will
only work with port A, as
the command console is
not available on port B.
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