F405 Mini BLS
35A 20x20 Stack
User Manual V1.0
Contents (Click on any section to jump)
Part 1 - OverView
Specs Overview
Dimensions
1
1
Package
FC & ESC Connection
Part 2 - SpeedyBee F405 Mini Flight Controller
3
4
5
2
Specifications
Part 3 - SpeedyBee BLS 35A Mini V2 4-in-1 ESC
Layout
Connection with Motors & Power Cable
ESC Configuration
ESC Firmware Update
Specifications
5
6
7
F405 Mini
Layout
FC’s Peripheral Connection
App & FC Configuration
FC Firmware Update
8
9
10
10
11
12
13
14
P
1/14
art 1 Overview
Specs Overview
1/14
Product Name
SpeedyBee F405 Mini BLS 35A 20x20 Stack
Flight Controller
SpeedyBee F405 Mini
ESC
SpeedyBee BLS 35A Mini V2 4-in-1 ESC
Bluetooth
Supported. Used to connect with the SpeedyBee App for
flight controller and ESC parameter configuration. Please
make sure the MSP switch on UART 4 is turned on and
set to a baud rate of 115200, otherwise Bluetooth
functionality will not be available.
WiFi
NOT Supported
Wireless FC
Firmware Flashing
NOT Supported
Wireless Blackbox
Dwonload & Analysis
NOT Supported
Power Input
3-6S LiPo
Mounting
20 x 20mm 3.5mm hole size，Compatible with M2 and
M3 screws/Silicone grommets.
Dimension
32mm(L) x 35mm(W) x 15.2mm(H)
Weight
13.5g
Dimensions
1.6mm
2/14
3.5mm
3.6mm
30mm
30mm
35mm
32mm
V2
7.8mm
20mm
5.5mm
20mm
15.2mm
Package
3/14
1
SpeedyBee F405 Mini Flight Controller x 1
2
SpeedyBee 35A BLHeliS Mini V2 4-in-1 ESC x 1
3
Manual & App Download Card x 1
4
35V 470uF Capacitor x 1
5
8pin JST cable(For FC & ESC Connection） x 1
6
DJI 6-pin Cable(80mm) x 1
7
XT30 Power Cable(Length: 7cm) x 1
M2 Accessories
8
M2 Silicone O-Ring x 5
9
M2 Nylon Hex Nut x 5
10
M2(Hole Diameter) * 7.6mm(Height) Anti-vibration Silicone Grommets x 9
11
M2(Diameter) * 25mm(Length) Screw x 4
12 M2(Diameter) * 20mm(Length) Screw x 4
M3 Accessories
13 M3 Silicone O-Ring x 5
14 M3 Nylon Hex Nut x 5
15 M3(Hole Diameter) * 6.6mm(Height) Anti-vibration Silicone Grommets x 9
M3(Diameter) * 25mm(Length) Screw x 4
17
M3(Diameter) * 20mm(Length) Screw x 4
2
3
MANUAL / APP
DOWNLOAD
1
MANUAL / APP
V2
4
5
6
7
8
11
9
13
14
12
10
16
17
15
MANUAL / A
www.SpeedyBee.com
16
FC & ESC Connection
4/14
Use the 8-pin cable in the package to connect the FC and the ESC. Or solder
8 wires directly to the 8 pads on each end.
Method 1 - Using 8-pin cable
V2
Use any end of the 8-pin JST cable to connect the FC to the ESC.
F405 Mini Flight Controller
BLS 35A Mini V2 4-in-1 ESC
GND/BAT/+
M1
M2
M3
M4
CURRENT
TELEMETRY
N/A
CURRENT
M4
M3
M2
M1
BAT/+
GND/-
Method 2 - Direct soldering
Solder 8 wires to the 8 pads on each end referring to the pad definition below.
GND
N
BAT
CURRENT
M1
S4
M2
S3
M3
S2
M4
S1
CUR
VBTA
TEL
GND
F405 Mini Flight Controller
BLS 35A Mini V2 4-in-1 ESC
P
5/14
SpeedyBee F405
art 2 Mini Flight Controller
Layout
5/14
FPV Cam
Buzzer
Receiver
Red LED
Blue LED
Green LED
Gyro(ICM42688P)
Bluetooth
Antenna
USB TYPC-C Port
Bluetooth Chip
4-level LED
battery
indicator
OSD
Chip(AT7456E)
Barometer
Betaflight LED
GPS&Compass VTX(Analog) VTX(DJI)
8pin Connector(to ESC)
TVS Diode
(Anti-volatge spike)
5V 2A BEC
MCU: F405
BOOT Button
9V 3A BEC
LED Indicator Definition
RED LED - Power Indicator.Solid Red after powering up.
GREEN LED - Bluetooth status light. Solid Green indicates Bluetooth is connected.
BLUE LED - Flight controller status light which is controlled by the flight
controller firmware.
BOOT Button
Only if the flight controller gets bricked and can’t power up, please follow these
steps to re-flash firmware for it:
① Insert a USB A to TYPE-C cable to your PC.
② Press and hold the BOOT button, insert the USB cable into the flight controller, then release
the BOOT button.
③ Open Betaflight/INAV configurator on the PC, go to the ‘Firmware Flashing’ page, choose the
target ‘SPEEDYBEEF405MINI’ and flash.
FC’s Peripheral Connection
Spektrum
SRXL2 Receiver
6/14
GND
3V3
NC
S
RX
TX
5V
G
RX
T2
TX
5V
PPM Receiver
G
ELRS Receiver
PPM
PPM
5V
GND
SBUS
5V
GND
Model:
Phoenix
2 2
Model:
Phoenix
Joshua
Edition
SBUS Receiver
5-36V
GND
Video
5-36V
GND
Video
GND
G/TX
M/RX
Menu
Menu
CH2 RX
CH1 TX
5V
GND
CH2
CH1
T2
R2
Crossfire Nano Rx
SBUS
G
4V5
3V3
CC
G
CAM
5V
5V
GND
BZBZ+
SBUS
G
R1
T1
IRC
Video
G
5V
T6
9V
CL
R6
G
4V5
DA
LED Strip
5V
GND
LED
Buzzer
5V
5V
5V
Video
SCL
GND
IRC
TX
RX
5V
GND
VIDEO
IRC
SDA
PGND
3.7-5V
GND
SBUS
TX
RX
GND
7.4-26.4V
GND
GPS
DJI Air Unit
Analog VTX
GND
N
BAT
CURRENT
M1
S4
M2
S3
M3
S2
M4
S1
CUR
VBTA
TEL
GND
F405 Mini Flight Controller
BLS 35A Mini V2 4-in-1 ESC
Motor 4
Motor 2
V2
Motor 3
Motor 1
XT30 Power
Cable
470uF Low-ESR
Capacitor
Note: In order to prevent the stack from being burnt
out by voltage spikes on powering up, it is strongly
recommended to use the Low ESR capacitor in the
package.
Cable Connection vs DJI O3 Air Unit
Use the DJI 6-pin cable(80mm) comes with the F405 Mini stack(See the accessory No.6 in the
package section). Cut off the 8-pin connector and keep the 6-pin connector.Use the 6-pin
connector to connect to the DJI O3 Air Unit, and then solder the other end to the flight controller.
Cable Connection vs RunCam Link/
Caddx Vista Air Unit
Use the DJI 6-pin cable(80mm) comes with the F405 Mini stack(See the accessory No.6 in the
package section). Cut off the connectors on both ends and solder the 6 wires.
SBUS
GND
TX
RX
GND
7.4-26.4V
Cable Connection vs DJI Air Unit V1
Use the DJI 6-pin cable(80mm) comes with the F405 Mini stack(See the accessory No.6 in the
package section). Cut off the 6-pin connector and keep the 8-pin connector. Use the 8-pin
connector to connect to the DJI Air Unit V1, and then solder the other end to the flight controller.
Important notice for SBUS receiver
When using an SBUS receiver, the SBUS signal wire of the receiver must be connected to the SBUS
pad on the front side of the flight controller (this pad internally uses UART2).
If you are also using the DJI Air Unit(O3/Link/Vista/Air Unit V1), you will need to disconnect the
SBUS signal wire from the Air Unit harness. Failure to do so will prevent the SBUS receiver from
being properly recognized by the flight controller. You can use tweezers to pick out the SBUS
wire from the 6-pin harness connector (or directly cut this wire) and insulate the exposed part
of the wire carefully.
SBUS Receiver
SBUS
Do NOT connect this wire
to assure the external
SBUS receiver work properly!
5V
GND
F405 Mini Flight Controller
DJI O3/Vista/Link/Air Unit V1
Important notice for ELRS receiver
We recommend connecting the ELRS receiver's TX and RX to the T2 and R2 pads on the flight
controller. However, when using the DJI Air Unit simultaneously, some ELRS receivers may not
be recognized properly by the flight controller. If you encounter this issue, you need to
disconnect the SBUS signal wire from the Air Unit harness. You can use tweezers to pick out
the SBUS wire from the 6-pin harness connector (or directly cut this wire) and insulate the
exposed part of the wire carefully.
RX
TX
5V
G
RX
TX
5V
G
ELRS Receiver
F405 Mini Flight Controller
For some ELRS receivers, it
is necessary to disconnect
this wire in order to function
properly!
DJI O3/Vista/Link/Air Unit V1
App & FC Configuration
7/14
Get the SpeedyBee App
Search ‘SpeedyBee’ on Google Play or App Store. Or download the Android .apk file on our
website: https://www.speedybee.com/download.
FC Configuration
2
1
3
4
FC Firmware Update
8/14
SpeedyBee F405 Mini flight controller does not support wireless firmware flashing, so please flash
firmware for it on your PC following the steps below:
① Connect the flight controller to the PC with a USB cable
② Open Betafight/INAV configurator on your PC. Take Betaflight configurator as an
example, go to the ‘Firmware Flashing’ page, choose the target ‘SPEEDYBEEF405MINI’ and flash.
Specifications
9/14
Product Name
SpeedyBee F405 V3 30x30 Flight Controller
MCU
STM32F405
IMU(Gyro)
ICM42688P
USB Portype
Type-C
Barometer
Built-in
OSD Chip
AT7456E chip
BLE Bluetooth
Supported. Used to connect with the SpeedyBee App for flight controller and ESC parameter
configuration. Please make sure the MSP switch on UART 4 is turned on and set to a baud
rate of 115200, otherwise Bluetooth functionality will not be available.
WIFI
Not supported
Wireless FC Firmware Flashing
NOT Supported.
Please connect to the Betaflight configurator on the PC to do FC firmeare update.
Wireless Blackbox
Dwonload & Analysis
NOT Supported.
Please connect to the Betaflight configurator on the PC to do blackbox analysis.
DJI Air Unit Connection Way
Direct soldering
DJI Air Unit Compatibility
Compatible with all DJI Air Units: DJI O3/RunCam Link/Caddx Vista/DJI Air Unit V1. Please
use the solder pads <9V, G, T1, R1, G, SUBS(R2)> on the front right corner of the flight
controller to make a pin-to-pin connection with the solder pads on the DJI Air Unit.
UART1(T1, R1) is used for OSD and SUBS(R2) is used for DJI Air Unit’s internal SBUS
receiver signal input.
Blackbox
8MB Onboard Flash
BetaFlight Camera Control Pad
Yes(CC pad on the front side)
Current Sensor Input
Supported. For SpeedyBee BLS 35A V2 ESC, please set Scale=250 and Offset=-500.
Power Input
3-6S LiPo. The flight controller is powered through the G, V wires of the 8pin harness
or G, V pads from the bottom side of the flight controller.
5V Output
4 groups of 5V output, three +5V pads and 1 BZ+ pad( used for Buzzer) on front side.
The total current load is 2A.
9V Output
1 group of 9V output, one +9V pad on front side. The total current load is 3A.
3.3V Output
Supported. Soldering pad named ‘3V3’ on the front top of the flight controller. Designed
for 3.3V input receivers. Up to 500mA current load.
4.5V Output
Supported. Designed for radio receiver and GPS module even when the FC is powered
through the USB port. Up to 1A current load.
ESC Signal
M1 - M4 wires or soldering pads on bottom side.
UART
6 sets(UART1, UART2, UART3, UART4(Dedicated for Bluetooth connection)),
UART5(Dedicated for ESC telemetry),UART6
ESC Telemetry
UART R5(UART5)
I2C
Supported. DA & CL pads on front side. Used for magnetometer, sonar, etc
Traditional Betaflight LED Pad
Supported. 5V, G and LED pads on bottom of the front side. Used for WS2812 LEDs
controlled by the Betaflight firmware.
Buzzer
BZ+ and BZ- pad used for 5V Buzzer
BOOT Button
Supported. Press and hold BOOT button and power the FC on at the same time will force
the FC to enter DFU mode, this is for firmware flashing when the FC gets bricked.
RSSI Input
Not Supported
Smart Port / F.Port
Not Supported
Supported Flight Controller Firmware
BetaFlight(Default), INAV
Firmware Target Name
SPEEDYBEEF405MINI
Mounting
20 x 20mm
Dimension
30(L) x 32(W) x 7.8(H)mm
Weight
9.6g
3.5mm hole diameter，Compatible with M2 and M3 screws/Silicone grommets.
P
10/14
SpeedyBee BLS 35A
art 3 Mini V2 4-in-1 ESC
Layout
10/14
MCU(BB21)
MOTOR 4
MOTOR 2
MOTOR 3
MOTOR 1
Capacitor pin
hole(BAT+)
BAT+
BAT-
Capacitor pin
hole(GND)
8pin connector
(to FC)
Driver chips
TVS Diode
Connection with Motors & Power Cable
Motor 4
11/14
Motor 2
V2
Motor 3
470uF Low-ESR
Capacitor
Motor 1
XT30 Power
Cable
Note: In order to prevent the stack from being burnt
out by voltage spikes on powering up, it is strongly
recommended to use the Low ESR capacitor in
the package.
ESC Configuration
12/14
You could use SpeedyBee app to completely configure this 8-bit ESC for both BLHeli_S or Bluejay
firmware. The steps are as follows:
1
2
3
You could also use PC configurators to configure this ESC. We recommend the ESC
Configurator. Please use Google Chrome browser and visist:
http://www.esc-configurator.com.
ESC Firmware Update
13/14
This 8-bit 50A ESC can run BLHeliS or Bluejay firmware. It is loaded with BLHeliS firmware by default.
You could also flash it to Bluejay firmware which can support RPM filtering and Bi-directional Dhsot.
Firmware flashing steps are as follows:
● Remove all the propellers from your drone.
● Ensure that the flight controller is connected properly to the ESC, then power up the drone. This
step ensures that the ESC starts up correctly.
● Connect the flight controller to the computer using a USB Type-C cable.
● Open the Chrome browser and visit the following website: https://www.esc-configurator.com/
● Follow the firmware flashing steps as shown in the screenshots below.
Important note:
On the 6th interface, the "ESC" type must be selected as "J-H-40".
1
2
3
4
0
0
5
J-H-40
6
Specifications
Product Name
SpeedyBee 35A BLHeli_S Mini V2 4-in-1 ESC
Firmware
BLHeli S J-H-40
Continuous Current
35A * 4
Burst Current
45A(5seconds)
ESC Protocol
DSHOT300/600
Power Input
3-6S LiPo
Power Output
VBAT(Battery voltage, used to power the flight controller)
Current Sensor
Support (Scale=250 Offset=-500)
ESC Telemetry
Not supported
Mounting
20 x 20mm 3.5mm hole size，compatible with M2 and M3
screws/Silicone grommets.
Dimension
35 * 35 * 5.5mm
Weight
7.2g
14/14
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