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 number

Pin name

Direction

Voltage level

Function

1

12V

IN

+12V

Main power input

2

12V

IN

+12V

Main power input

3

12V

IN

+12V

Main power input

4

BAT_CURRENT

IN

+3.3V

Battery current monitoring

5

BAT_VOLTAGE

IN

+3.3V

Battery voltage monitoring

6

3V3

OUT

+3.3V

3.3V output

7

PWR_KEY

IN

+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 number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

5V output

2

PPM_IN

IN

+3.3V

PPM input

3

RSSI_IN

IN

+3.3V

RSSI input

4

FAN_OUT

OUT

+5V

Fan output

5

SBUS_OUT

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 number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Radio module power supply

2

5V

OUT

+5V

Radio module power supply

3

ETH_TXP

OUT

+3.3V

Ethernet transmit positive

4

ETH_TXN

OUT

+3.3V

Ethernet transmit negative

5

ETH_RXP

IN

+3.3V

Ethernet receive positive

6

ETH_RXN

IN

+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 number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

USART2_TX

OUT

+3.3V

Telemetry 3 TX

3

USART2_RX

IN

+3.3V

Telemetry 3 RX

4

USART2_CTS

IN

+3.3V

Telemetry 3 CTS

5

USART2_RTS

OUT

+3.3V

Telemetry 3 RTS

6

GND

Ground

I2C3 / UART4 - JST GH SM06B-GHS-TB

Pin number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

USART4_TX

OUT

+3.3V

UART 4 TX

3

USART4_RX

IN

+3.3V

UART 4 RX

4

I2C3_SCL

I/O

+3.3V

I2C3 Clock

5

I2C3_SDA

I/O

+3.3V

I2C3 Data

6

GND

Ground

GPS2 - JST GH SM06B-GHS-TB

Pin number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

USART8_TX

OUT

+3.3V

UART 8 TX GPS2

3

USART8_RX

IN

+3.3V

UART 8 RX GPS2

4

I2C2_SCL

I/O

+3.3V

I2C2 Clock

5

I2C2_SDA

I/O

+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 number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

USART7_TX

OUT

+3.3V

Telemetry 1 TX

3

USART7_RX

IN

+3.3V

Telemetry 1 RX

4

USART7_CTS

IN

+3.3V

Telemetry 1 CTS

5

USART7_RTS

OUT

+3.3V

Telemetry 1 RTS

6

GND

Ground

GPS1 - JST GH SM10B-GHS-TB

Pin number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

USART1_TX

OUT

+3.3V

GPS 1 TX

3

USART1_RX

IN

+3.3V

GPS 1 RX

4

I2C1_SCL

I/O

+3.3V

MAG 1 Clock

5

I2C1_SDA

I/O

+3.3V

MAG 1 Data

6

SAFETY_BTN

IN

+3.3V

Safety button

7

SAFETY_LED

OUT

+3.3V

Safety LED

8

+3V3

OUT

+3.3V

3.3V output

9

BUZZER

OUT

+5V

Buzzer output

10

GND

Ground

CAN1 - JST GH SM04B-GHS-TB

Pin number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

CAN1_H

I/O

+5V

CAN 1 High (120Ω)

3

CAN1_L

I/O

+5V

CAN 1 Low (120Ω)

4

GND

Ground

CAN2 - JST GH SM04B-GHS-TB

Pin number

Pin name

Direction

Voltage level

Function

1

5V

OUT

+5V

Power supply output

2

CAN2_H

I/O

+5V

CAN 2 High (120Ω)

3

CAN2_L

I/O

+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

Read side
  • SBUS input

  • 16 PWM output channels

  • 2x LTE antenna sockets (MIMO)

  • 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:

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