Interface Definition

Peripheral Interface Table

Interface No.	Interface Name	Function Description
1	C1	Camera 1
2	POWER	IO 17-Pin interface, see "IO 17-PIN Definition Table"
3	LINK	Aviation plug to Ethernet adapter
4	C2	Camera 2
5	Type-C	Type-C interface
6	HDMI	HDMI display interface
7	Indicators	PWR/LNK/SYS/C0/C1/C2
8	WIFI/BT	WIFI/BT protective cover, WIFI/BT antenna hidden beneath

IO 17-PIN Definition Table

The power & IO aviation interface, cable, and pin definitions are as follows. The housing uses an M12 male connector.

Pin	Signal	I/O Signal Source	Description	Cable Color Reference (subject to actual label)
1	VCC+	NA	DC Power +	Green
2	VCC+	NA	DC Power +	Green-White
3	VCC-	NA	Power Ground	Brown
4	VCC-	NA	Power Ground	White
5	LED+	NA	External Light Source +	Red
6	LED-	NA	External Light Source -	Black
7	RS485_A	NA	RS485_A	Yellow
8	RS485_B	NA	RS485_B	Yellow-White
9	OPTO_IN0	Line0 +	Opto-isolated Input 0+	Orange
10	OPTO_IN1	Line1 +	Opto-isolated Input 1+	Orange-White
11	IN_COM0	Line0/1/2 -	Opto-isolated Input 0/1/2 -	Purple
12	OPTO_OUT0	Line4 +	Opto-isolated Output 4+	Purple-White
13	OPTO_OUT1	Line5 +	Opto-isolated Output 5+	Blue
14	OUT_COM0	Line3/4/5/6 -	Opto-isolated Output -	Pink
15	OPTO_OUT2	Line3 +	Opto-isolated Output 3+	Brown-White
16	OPTO_IN2	Line2 +	Opto-isolated Input 2+	Blue-White
17	OPTO_OUT3	Line6 +	Opto-isolated Output 6+	Gray

⚠ Warning

1. The sub-wire colors of the 17 PIN cable may vary by production batch. Please refer to the actual label colors. This document provides reference only!
2. Some batches of the 17 PIN cable have LED+ and LED- paralleled into a separate terminal. It is not recommended to use this together with the LED+ and LED- in the 17 PIN connector, as using both parallel light source outputs simultaneously may result in insufficient power.

Network Port Aviation Header Pin Definition

The 8-PIN interface on the camera housing uses an M12 female connector.

Peripheral Devices

Camera

Item	Specification
Camera Configuration	1x Main Camera (optional) + 2x GMSL Sub-Cameras (optional)
Lens Mount	C-Mount, with lens protective cover

Comparison of the two optional sensors:

Parameter	SC535HGS	SC880sl
Sensor Type	CMOS, Global shutter, Color	CMOS, Rolling shutter, Color
Sensor Size	2/3"	1/1.2"
Pixel Size	3.45μm	2.988μm
Max Resolution	2448×2048	3840×2160
Max Frame Rate	80 FPS	60 FPS
CRA	0°	9°

Display

• 1x HDMI port, supports external display connection

Bluetooth

The camera supports Bluetooth (classic/BLE). You can use the bluetoothctl command to turn Bluetooth on/off, scan, pair, and connect devices. The Bluetooth stack is BlueZ 5.64.

Turn On Bluetooth

bluetoothctl power on

Check Status

bluetoothctl show          # View controller (powered/name/address)
hciconfig -a               # View hci0 status
bluetoothctl devices       # View paired devices

Scan

bluetoothctl               # Enter interactive mode
scan on                    # Start scanning (BLE + classic)
devices                    # List discovered devices
scan off                   # Stop scanning (for viewing only; keep scan on when pairing, see next step)

Classic Bluetooth only (requires root):

sudo hcitool scan           # Classic Bluetooth
sudo hcitool lescan         # Low Energy BLE

Connect and Use

⚠️ Note

Before pairing, put the target device into pairing mode (e.g., K380 keyboard: long-press F1/F2/F3 for 3 seconds until the indicator blinks rapidly); otherwise pair will report Device not available.

bluetoothctl               # Enter interactive mode
scan on                    # Start scanning (keep it on when pairing; do not scan off, otherwise the cache will be cleared)
pair <MAC>                 # Pair, e.g., pair F4:73:35:8B:B7:12
                           #   If a Passkey is prompted (e.g., 162375), type the 6-digit number on the keyboard and press Enter
trust <MAC>                # Trust (avoid repeated confirmation)
connect <MAC>              # Connect (after pairing, use this command to reconnect later)

Disconnect / remove:

disconnect <MAC>           # Disconnect
remove <MAC>               # Remove device

Turn Off Bluetooth

bluetoothctl power off

💡 Tip

Low-level commands such as hcitool require sudo; bluetoothctl can be used by regular users.

4G Module

The camera supports an external 4G module for cellular network access. The following describes how to test the external 4G module.

Hardware Preparation

• The 4G module requires a separate power supply.
• USB adapter: one end of the micro cable connects to the 4G module, and the other end connects to the USB adapter, which is then plugged into the camera.

Test Steps

1. Download the firmware to the camera, then power on and enter the system.

2. Connect the PC and the camera to the same WiFi network.

3. Connect to the camera via WiFi ADB:

   • Connect the camera to the PC via a Type-C cable.

   • Get the device WiFi IP address:

     adb shell ifconfig wlan0

     

   • Switch to TCP mode:

     adb root
     adb tcpip 5555

   • Connect to the device IP:

     adb connect <device-ip>:5555

4. Disconnect the Type-C cable between the camera and the PC.

5. Connect the 4G module to the camera via the USB adapter.

   

6. Run lsusb to check whether the 4G module is mounted. If 05c6:f601 appears, the module is mounted successfully:

   lsusb

   

7. Run ifconfig to check whether the usb0 network interface appears:

   ifconfig

   

8. Ping an external network through the 4G module's network interface. If the ping succeeds, communication is working:

   ping -I usb0 www.baidu.com

   

GPIO

• 3x Opto-isolated Input (Line0/Line1/Line2) + 1x Input Ground
• 4x Opto-isolated Output (Line3/Line4/Line5/Line6) + 1x Output Ground
• 1x RS485

See Board Hardware — Interfaces.

RS-485

⚠ Note

The camera's RS-485 interface is currently a 2-wire serial port without flow control, which may cause significant packet loss (20%+) during transmission and reception. Run the following command to restore the serial port to a "no packet loss" reliable communication mode (takes effect immediately).

Run the following command on the device:

stty -F /dev/ttyHS1 9600 cs8 -parenb -cstopb -echo -echoe -echok -echoctl -echoke -icanon -iexten -isig -opost -onlcr -ocrnl -onocr -icrnl -ixon -ixoff -ixany -crtscts raw

I2C

To be added.

SPI

To be added.