GSM/GPRS/GPS Shield (B)

GSM/GPRS/GPS Shield (B)
Introduction
GSM/GPRS/GPS Shield (B), Arduino Shield Based on SIM808
How to use
Hardware description
Hardware connection
1.
2.
3.
4.
5.
6.
SIM808 module
MIC29302 power chip
CP2102: USB TO UART converter
SMF05C: TVS diode
1N5408: onboard rectifier
SIM808 functional pins
7. Arduino expansion connector
8. USB TO UART interface
9. DC power jack
10. GPS antenna connector
11. Bluetooth antenna connector
12. Firmware upgrade interface
13. GSM antenna connector
14. SIM card slot
15. 3.5mm earphone/mic jack
16. GPS status indicator
17. CP2102 UART Tx/Rx indicator
18. NET indicator:
flashes fast when the module starts up
flashes slowly after GSM register succeed
19. Power indicator
20. Power switch
21. SIM808 control button: press the button and hold for 1s, to startup/shutdown the SIM808
22. Reset button
23. UART selection switch, select controlling the SIM808 via:
CP2102
UART pins of Arduino interface
24. SIM808 UART configuration:
SIM_TX: SIM808 UART TX
SIM_RX: SIM808 UART RX
25. IOREF power selection: configure the UART voltage level
Getting started
Preparation
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GSM/GPRS/GPS Shield (B) (this product)
SIM card
5V TTL UART module
Serial monitor software (installed on your PC)
u-center software (of course also installed on your PC)
GSM antenna
GPS antenna
Bluetooth antenna
Micro USB cable
9V DC adapter
Basic operation
We will demonstrate some basic operation by GSM mode in this section.
1. Power up and the power indicator lights up.
2. Switch to CP2102 (UART selection switch).
Toggle the switch to the side of USB port by which setting communication between
CP2102 and SIM808.
3. Press the SIM808 control button and hold for 1s to startup the SIM808 until the NET
indicator flashes.
4. Run a serial monitor software and set as:
UART settings
a) UART settings
PortNum choose a COM Port (*)
BaudR 115200
Dpaity NONE
DataB 8 bit
StopB 1 bit
(*) You shall choose the COM Port listed in the Device Manager (This PC -> Properties ->
Device Manager).
Configuration of sending
Send AT command to verify the module
b) Check the Auto Checksum and then an Apendix bits setting box pops up. Check the Fixed
Byte Checksum and input 0D into the following box.
c) Input AT+GSV into the Sending box then click the button Send.
d) You can get the received information from the COM port data receive box.
GSM Debugging
GSM Commands Description
Frequently used commands for sending SMS
Command
Description
Response
AT
Make sure the module is working properly.
AT OK
New SMS message indications, e.g. send: AT+CNMI=2,1
to setup new SMS message indications. When a new
message is received and SIM card is not full, the SIM808
AT+CNMI
module will response via serial port, e.g. received:
+CMTI:"SM",1 means a new message received was stored
into the position 1 of the SIM card.
AT+CMGF=1
AT+CMGF=1
SMS Configuration
OK
Select TE Character Set
Send: AT+CSCS="GSM" to use GSM 7 bits default
AT+CSCS
alphabet; Send: AT+CSCS="UCS2" to use 16-bit universal
multiple-octet coded character set.
AT+CMGR
Read SMS message
Set SMS Text Mode Parameters. It should be set as
AT+CSMP
AT+CSMP=17,167,2,25 for using UCS2 format.
Set the message transmission number and send SMS
AT+CMGS="phone
message. After receiving the symbol >, a message (end
>
number"
with 0x1A) can be sent out.
This is a terminator. Before sending it out, you should
0x1A
check the option Send As Hex
(*) After sending the message, you should check the option Send As Hex, then send the
command 1A which means to send a message. Besides, you can send 1B, ESC's ASCII, to cancel
sending.
Sending English message

Sending messages using GSM default alphabet
Command
AT
AT+CMGF=1
AT+CMGS="phone
number"
0x1A
Description
Make sure the module is working properly.
SMS Configuration.
Set the message transmission number and send SMS message. After
receiving the symbol >, a message (end with 0x1A) can be sent out.
This is a terminator. Before sending it out, you should check the option
Send As Hex
Receiving English message
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Receiving messages using GSM default alphabet
command
AT
AT+CMGF=1
AT+CSCS="GSM"
AT+CNMI=2,1
AT+CMGR=num

description
Make sure the module is working properly.
SMS Configuration.
Use GSM alphabet
Setup new SMS message indications
Read SMS message. The num means the storage location of a message.
Sending messages using UCS2 character set
command
description
AT
Make sure the module is working properly.
AT+CMGF=1
SMS Configuration.
AT+CSMP=17,168,2,25
Set SMS Text Mode Parameters.
AT+CSCS="UCS2"
Use UCS2 character set.
Use the software Unicode
Use a software to convert phone number and messages to
Converter
Unicode.
AT+CMGS="a phone number in Set the phone number (in unicode). After receiving the symbol
unicode"
>, a message (end with 0x1A) can be sent out.
This is a terminator. Before sending it out, you should check
0x1A
the option Send As Hex
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Receiving messages using UCS2 character set
command
AT
AT+CMGF=1
AT+CSCS="GSM"
description
Make sure the module is working properly.
SMS Configuration.
Use GSM alphabet
AT+CNMI=2,1
Setup new SMS message indications
AT+CMGR=2
Use the software Unicode Converter
Read SMS message
Use a software to convert messages to Unicode.
Unicode Converter
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Frequently used commands for making and receiving calls.
command
description
Dial 13612345678, end with semicolon(;). You can
ATD13612345678;
make a call.
AT+CLIP
Calling line identification presentation
ATA
Answer an Incoming Call
ATH
Disconnect Existing Connection
Response
ATD13612345678
ok
AT+CLIP=1 OK
RING
(Please see SIM808_AT+Command+Manual_V1.01 for more details of AT commands)
GPS Debugging
Switching to GPS mode from GSM mode
Serial message receiving under GPS mode
1) Send the following commands:
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AT+ CGNSPWR =1 (GPS power up)
AT+ CGNSTST =1 (GPS reset)
Return OK.
2) GPS signal output: Choose the GPS serial port.
See GPS information by u-center
u-center software
Set the port and baud
See GPS information
GPS location
1) Open u-center software.
2) Click the button Receiver to set Port or Baudrate. Baudrate is 12500 by default which can be
set by the command AT+CGPSIPR. "Port" is the serial port in use.
3) Click Player to check the GPS information.
Remark: Please see the User Guide PDF for more details of u-center.
GPS Command Description
AT+CGNSPWR
GPS power control
=1, GPS power up
AT+CGNSINF
T+CGPSSTATUS
Get current GPS location info
GPS status
often 32
(Please see SIM808_AT+Command+Manual_V1.01 for more details of AT commands)
GPRS Debugging
Local virtual servers settings
Local virtual servers settings
Virtual servers can be used for setting up public services on your LAN. A virtual server is
defined as a service port, and all requests from Internet to this service port will be redirected to
the computer specified by the server IP. Please see your router's guide.
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Service Ports setting: set to a no conflict port. In this example, the service port is set as
12345.
IP Address setting: Run CMD in the PC, and execute the 'ipconfig' command to confirm
your IPv4 address. In this example, the IP address is 192.168.1.104.
GPRS Command Description
1) The GPRS configuration can be performed by sending out following commands sequentially:
command
AT+CSQ
AT+CSTT="CMNET"
AT+CIICR
AT+CIFSR
AT+CDNSGIP=www.sim.com
2) GPRS debugging:
Description
Signal quality report
Set APN as "CMNET".
Bring up wireless connection with GPRS or CSD
Get Local IP Address
Query the IP Address of Given Domain Name
GPRS running state
Find out the PC's WAN IP, which can be obtained by searching "IP" in a search engine, or
inquiring your Internet service providers directly. In this example, the WAN IP address is
222.125.175.28. Then send out following commands sequentially:
Command
Description
The WAN IP address should be set
according to actual condition. In this
AT+CIPSTART="TCP","222.125.175.28","12345"
example, the WAN IP address is
222.125.175.28, and port number is 12345.
Send SMS message. After receiving the
AT+CIPSEND
symbol >, a message (end with 0x1A) can
be sent out
This is a terminator. Before sending it out,
0x1A
you should check the option Send As Hex
AT+CIPCLOSE
Close TCP or UDP Connetion
AT+CIPSHUT
Deactivate GPRS PDP Context
(*) After sending the message, you should check the option Send As Hex, then send the
command 1A which means to send a message.
(Please see SIM808_AT+Command+Manual_V1.01 for more details of AT commands)
Bluetooth Debugging
Bluetooth Debugging
AT commands for Bluetooth debugging
Command
Description
AT+BTPOWER=1 BT power control. =1, BT power up
AT+BTHOST?
Inquiry and set host BT device name. Response: Name and MAC address
AT+BTSCAN=1,10 Scan surrounding BT device. Scanning time 10-60s (10s here)
Set BT pairing mode. To connect with a BT device, you need input
AT+BTPAIR=1,1
AT+BTPAIR=1,1 to confirm pairing request.
There is a request that tries to build a SPP’s
AT+BTACPT=1
connection.
Dial up a voice call using BT device. Here 10086 is a phone number to be
AT+BTATD=10086
dialed.
How to use with Arduino UNO R3
Preparation
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GSM/GPRS/GPS Shield (B) (this product)
Arduino UNO R3
SIM card
USB cable (type B)
Serial monitor software (installed on your PC)
u-center software (of course also installed on your PC)
GSM antenna
GPS antenna
Bluetooth antenna
9V DC adapter
1) Operation
Arduino hardware connection
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Tag 1: Connect a USB cable (type B) to your Arduino.
Tag 2: Connect a micro USB cable to the module.
Tag 3: DC power supply (6-9V).
Tag 4: Power up your board.
Tag 5: Set the VREF for your Arduino.
Tag 6: Connect a GPS antenna.
Tag 7: SIM808 control button.
press the button and hold for 1s, to startup/shutdown the SIM808
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Tag 8: Connect a BT antenna.
Tag 9: Connect a GSM antenna.
Tag 10: SIM808 UART configuration
SIM_TX: SIM808 UART TX
SIM_RX: SIM808 UART RX
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Tag 11: Set the UART communication port, select controlling the SIM808 via:
CP2102
UART pins of Arduino interface
Software Debugging
Open GNSS.ino
Verify the program and open a serial monitor
Press RESET
For example, we use GPS by the steps:
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Set the UART communication port to Arduino.
Press PWRKEY and hold for 1s to startup the SIM808.
Upload the program to your Arduino R3
Open Arduino's Serial Monitor.
Press RESET
Or use the software u-center instead of Serial Monitor.
How to use with NUCLEO-F401RE
Preparation
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GSM/GPRS/GPS Shield (B) (this product)
NUCLEO-F401RE
ST-LINK Debugger
Micro USB cable
Serial monitor software (installed on your PC)
u-center software (of course also installed on your PC)
9V DC adapter
1) Operation
NUCLEO-F401RE hardware connection
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Tag 1: SIM808 UART configuration
SIM_TX: SIM808 UART TX
SIM_RX: SIM808 UART RX
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Tag 2: Connect a micro USB cable to the serial port of Nucleo board.
Tag 3: DC power supply (6-9V).
Tag 4: Jumper settings: Enable the communication between STM32 MCU and this
product.
RX---PA3
TX---PA2
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Tag 5: Jumper settings: Enable the communication between CP2102 and STM32 MCU.
RX---PC7
TX---PC6
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Tag 6: Power up your board.
Tag 7: Set the VREF for your Nucleo.
Tag 8: Connect a GPS antenna.
Tag 9: SIM808 control button.
press the button and hold for 1s, to startup/shutdown the SIM808
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Tag 10: Connect a BT antenna.
Tag 11: Connect a GSM antenna.
Tag 12: SIM808 UART configuration
SIM_TX: SIM808 UART TX
SIM_RX: SIM808 UART RX
Software Debugging
For example, we use GPS by the steps:
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Download the program to your NUCLEO-F401RE using ST-LINK.
Press the RESET button.
Download the program to your Nucleo.
Open serial monitor software. Choose the serial port and set the baudrate as 115200.
Press RESET and get info.
Or use the software u-center instead of serial monitor software.
Compile and download the project GSP.uvproj by Keil MDK
Get the serial information using a serial monitor software
See GPS information by u-center
Resources
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Schematic
Source code
Datasheets
GSM808 Related
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SIM800 Bluetooth applocation
SIM800 Series GNSS Application Note V1.00
SIM808 SPEC V1507.pdf
SIM808 Hardware Design V1.02.pdf
SIM800 Series AT Command Manual V1.09
Other chips
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MIC29302
SMF05C
CP2102
Download PDF