Pinout

ARK FPV Flight Controller Top

ARK FPV Flight Controller Bottom

UART Port Mapping

UART	Connector	PX4 name	Nuttx tty
USART1	GPS	GPS1	/dev/ttyS0
USART2	VTX	Telem3	/dev/ttyS1
USART3	Debug	Debug	/dev/ttyS2
UART4	PWM	UART4	/dev/ttyS3
UART5	VTX	Telem2	/dev/ttyS4
USART6	RC	USART6	/dev/ttyS5
UART7	Telem	Telem1	/dev/ttyS6

PWM UART4 - 8 Pin JST-GH

Pin Number	Signal Name	Voltage
1	VBAT IN	5.5V-54V
2	CURR_IN_EXT	3.3V
3	UART4_RX_EXT	3.3V
4	FMU_CH1_EXT	3.3V
5	FMU_CH2_EXT	3.3V
6	FMU_CH3_EXT	3.3V
7	FMU_CH4_EXT	3.3V
8	GND	GND

RC - 4 Pin JST-GH

Pin Number	Signal Name	Voltage
1	5.0V	5.0V
2	USART6_RX_IN_EXT	3.3V
3	USART6_TX_OUTPUT_EXT	3.3V
4	GND	GND

PWM EXTRA - 6 Pin JST-SH

Pin Number	Signal Name	Voltage
1	FMU_CH5_EXT	3.3V
2	FMU_CH6_EXT	3.3V
3	FMU_CH7_EXT	3.3V
4	FMU_CH8_EXT	3.3V
5	FMU_CH9_EXT	3.3V
6	GND	GND

POWER AUX - 3 Pin JST-GH

Pin Number	Signal Name	Voltage
1	12.0V	12.0V
2	GND	GND
3	VBAT IN/OUT	5.5V-54V

CAN - 4 Pin JST-GH

Pin Number	Signal Name	Voltage
1	5.0V	5.0V
2	CAN1_P	5.0V
3	CAN1_N	5.0V
4	GND	GND

GPS - 6 Pin JST-GH

Pin Number	Signal Name	Voltage
1	5.0V	5.0V
2	USART1_TX_GPS1_EXT	3.3V
3	USART1_RX_GPS1_EXT	3.3V
4	I2C1_SCL_GPS1_EXT	3.3V
5	I2C1_SDA_GPS1_EXT	3.3V
6	GND	GND

TELEM - 6 Pin JST-GH

Pin Number	Signal Name	Voltage
1	5.0V	5.0V
2	UART7_TX_TELEM1_EXT	3.3V
3	UART7_RX_TELEM1_EXT	3.3V
4	UART7_CTS_TELEM1_EXT	3.3V
5	UART7_RTS_TELEM1_EXT	3.3V
6	GND	GND

VTX - 6 Pin JST-GH

Pin Number	Signal Name	Voltage
1	12.0V	12.0V
2	GND	GND
3	UART5_TX_TELEM2_EXT	3.3V
4	UART5_RX_TELEM2_EXT	3.3V
5	USART2_RX_TELEM3_EXT	3.3V
6	GND	GND

SPI (OSD or IMU) - 8 Pin JST-SH

Pin Number	Signal Name	Voltage
1	5.0V	5.0V
2	SPI6_SCK_EXT	3.3V
3	SPI6_MISO_EXT	3.3V
4	SPI6_MOSI_EXT	3.3V
5	SPI6_nCS1_EXT	3.3V
6	SPI6_DRDY1_EXT	3.3V
7	SPI6_nRESET_EXT	3.3V
8	GND	GND

Flight Controller Debug - 6 Pin JST-SH

Pin Number	Signal Name	Voltage
1	3V3_FMU	3.3V
2	USART3_TX_DEBUG	3.3V
3	USART3_RX_DEBUG	3.3V
4	FMU_SWDIO	3.3V
5	FMU_SWCLK	3.3V
6	GND	GND