User Manual

CH3/4/7/8 can be used as general purpose IO when not used for Serial/PWM RX.
CH7/8 can be used for a 3.3v Sonar sensor when not used for PWM RX.
ADC_1/2 can be used to connect Battery Current Monitoring and RSSI signals. (3.3v MAX).
OUTPUT headers - Connect up to 8 motors and/or servos
Currently supports PWM ESCs (400hz default), Oneshot 125 ESCs and PWM servos (50hz
default).
WARNING: Configure outputs before connecting power to servos and ESCs.
Boot Headers - Used for recovering firmware
No connection = Boot Normally
Bridged = STM32 Bootloader
VBAT headers - Connect flight battery for voltage monitoring, logging and warnings
WARNING: DOUBLE CHECK POLARITY!
Buzzer headers - Connect to a buzzer for warnings and notifications
Use a low-power ~50mA 5.0v buzzer that only requires power to produce sound, e.g.
Sonicrest HCM1205X. See Cleanflight manual for links. Can also be used to find your aircraft
after a crash.
I2C connector - Used for external sensors and OLED displays.
The SCL and SDA are 3.3v signals.
5.0v is always supplied via the on-board voltage regulators, even when powering via USB.
WARNING: logic level converters are REQUIRED if your sensors require 5.0v signals
UART2 connector - Used for 5.0v Serial IO. (GPS, etc.)
MUST NOT be used when SWD port is in use
VIN/VOUT connector - Used for Camera and wireless video transmitter
VIN/GND connect to the video signal and GND of the camera
VOUT/GND connect to the video signal and GND of the video transmitter
No voltage output, please ensure the extra voltage input for you camera and transmitter