Interfaces
This page describes general information and interface location of SmartAP AIRLink.
Connectors pinout
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
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
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
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
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
TEL3 - JST GH SM06B-GHS-TB
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
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
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
FMU USB - USB Type C
SIM Card - micro SIM
HDMI - mini HDMI
Front side
Main GNSS and compass port
Main telemetry port
CSI camera input
CAN 1
CAN 2
TEL1 - JST GH SM06B-GHS-TB
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
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
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
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
CAMERA - FPC 30 pin, 0.5mm pitch
Rear side
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:
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
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