Interfaces

This page describes general information and interface location of SmartAP AIRLink.

Connectors pinout

Left side

Left side

• Power input with voltage & current monitoring

• AI Mission Computer micro SD card

• Flight Controller micro SD card

• AI Mission Computer USB Type-C

• PPM input, SBUS output, RSSI monitor

POWER - JST GH SM10B-GHS-TB

Pin	Name	Voltage level	Function
1	12V	+12V	Main power input
2	12V	+12V	Main power input
3	12V	+12V	Main power input
4	BAT_CURRENT	+3.3V	Battery current monitoring
5	BAT_VOLTAGE	+3.3V	Battery voltage monitoring
6	3V3	+3.3V	3.3V output
7	PWR_KEY	+3.3V	Power key input
8	GND		Ground
9	GND		Ground
10	GND		Ground

CPU SD card - microSD

CPU USB - USB Type C

RC Connector - JST GH SM06B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	5V output
2	PPM_IN	+3.3V	PPM input
3	RSSI_IN	+3.3V	RSSI input
4	FAN_OUT	+5V	Fan output
5	SBUS_OUT	+3.3V	SBUS output
6	GND		Ground

FMU SD card - microSD

Right side

Right side

• Ethernet port with power output

• Telemetry port

• Second GPS port

• Spare I2C / UART port

• Flight controller USB Type-C

• Micro SIM Card

• HDMI input port (payload camera)

ETHERNET - JST GH SM08B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Radio module power supply
2	5V	+5V	Radio module power supply
3	ETH_TXP	+3.3V	Ethernet transmit positive
4	ETH_TXN	+3.3V	Ethernet transmit negative
5	ETH_RXP	+3.3V	Ethernet receive positive
6	ETH_RXN	+3.3V	Ethernet receive negative
7	GND		Ground
8	GND		Ground

Ethernet interface is decoupled with capacitors. Ethernet cable should be twisted to reduce EMI noise. Shorter cables are recommended for increased performance and higher bandwidth of the interface.

TEL3 - JST GH SM06B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	USART2_TX	+3.3V	Telemetry 3 TX
3	USART2_RX	+3.3V	Telemetry 3 RX
4	USART2_CTS	+3.3V	Telemetry 3 CTS
5	USART2_RTS	+3.3V	Telemetry 3 RTS
6	GND		Ground

I2C3 / UART4 - JST GH SM06B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	USART4_TX	+3.3V	UART 4 TX
3	USART4_RX	+3.3V	UART 4 RX
4	I2C3_SCL	+3.3V	I2C3 Clock
5	I2C3_SDA	+3.3V	I2C3 Data
6	GND		Ground

GPS2 - JST GH SM06B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	USART8_TX	+3.3V	UART 8 TX GPS2
3	USART8_RX	+3.3V	UART 8 RX GPS2
4	I2C2_SCL	+3.3V	I2C2 Clock
5	I2C2_SDA	+3.3V	I2C2 Data
6	GND		Ground

AIRLink has integrated 1.5KΩ pull-up resistors for all I2C lines. No external pull-up resistors required.

FMU USB - USB Type C

SIM Card - micro SIM

HDMI - mini HDMI

Front side

Front side

• Main GNSS and compass port

• Main telemetry port

• CSI camera input

• CAN 1

• CAN 2

TEL1 - JST GH SM06B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	USART7_TX	+3.3V	Telemetry 1 TX
3	USART7_RX	+3.3V	Telemetry 1 RX
4	USART7_CTS	+3.3V	Telemetry 1 CTS
5	USART7_RTS	+3.3V	Telemetry 1 RTS
6	GND		Ground

GPS1 - JST GH SM10B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	USART1_TX	+3.3V	GPS 1 TX
3	USART1_RX	+3.3V	GPS 1 RX
4	I2C1_SCL	+3.3V	MAG 1 Clock
5	I2C1_SDA	+3.3V	MAG 1 Data
6	SAFETY_BTN	+3.3V	Safety button
7	SAFETY_LED	+3.3V	Safety LED
8	+3V3	+3.3V	3.3V output
9	BUZZER	+5V	Buzzer output
10	GND		Ground

CAN1 - JST GH SM04B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	CAN1_H	+5V	CAN 1 High (120Ω)
3	CAN1_L	+5V	CAN 1 Low (120Ω)
4	GND		Ground

CAN2 - JST GH SM04B-GHS-TB

Pin	Name	Voltage level	Function
1	5V	+5V	Power supply output
2	CAN2_H	+5V	CAN 2 High (120Ω)
3	CAN2_L	+5V	CAN 2 Low (120Ω)
4	GND		Ground

AIRLink has integrated 120Ω CAN bus termination resistor. To comply with ISO 11898 user the second 120Ω resistor at the other end of the bus.

CAMERA - FPC 30 pin, 0.5mm pitch

Rear side

4G / LTE Edition

5G Edition

• SBUS input

• 16 PWM output channels

• 2x LTE antenna sockets in 4G, 4x LTE antenna sockets in 5G

• WiFi antenna socket (AP & Station modes)

Serial ports mapping

SmartAP AIRLink has a large number of serial ports with the following pinout:

UART Port	Path	Description
UART1	/dev/ttyS0	GPS 1
UART2	/dev/ttyS1	Telemetry 3
UART3	/dev/ttyS2	Debug console (internal connector)
UART4	/dev/ttyS3	Telemetry 4
UART5	/dev/ttyS4	Telemetry 2 (used internally with Mission Computer)
UART6	/dev/ttyS5	PWM IO Module (used internally)
UART7	/dev/ttyS6	Telemetry 1
UART8	/dev/ttyS7	GPS 2

Looking for CAD files? Here they are:

CAD Model

Want to see the detailed full specifications? Here is the PDF datasheet:

5MB

AIRLink-Datasheet.pdf

PDF

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SmartAP AIRLink Datasheet