AoooG Fuel Level Sensor Serial Communication Protocol

1. Request and Response Data Format

The following table defines the structure of the request and response packets for communicating with the sensor:

Request
Head	Address	Event	Data	CRC-8/MAXIM
1 byte	1 byte	1 byte	[0-128] byte	1 byte
0x31	0x01	0x06	-	0x6C
Response
Head	Address	Event	Data	CRC-8/MAXIM
1 byte	1 byte	1 byte	[0-128] byte	1 byte
0x3E	0x01	0x06	-	-

2. Command to Request Sensor Data (HEX Format)

Request data from a sensor with address 1 (AG-RS485 default address is 1, AG-RS232 default address is 0). Note: If connecting two AG-RS485 sensors, do not set the same address for both sensors. Use the configuration tool to modify the sensor address. Valid address range: 1-253.

Command Sent by GPS Tracker	Sensor Response Data
31 01 06 6C 31: Head (0x31) 01: Sensor Address (0x01). Adjust based on the actual sensor address. Note: RS232 default address is 0x00. 06: Event Code (0x06 indicates reading sensor data) 6C: CRC-8/MAXIM Checksum (Calculated from: 0x31 0x01 0x06)	3E 01 06 21 96 00 A7 E7 FD 3E: Head (0x3E) 01: Sensor Address (0x01) 06: Event Code (Matches the request event code) 21: Temperature (33°C) 96 00: Fuel Value (0x0096 = 150) A7 E7: Reserved Value - Can be ignored (0xE7A7 = 59303) FD: CRC-8/MAXIM Checksum

Sensor Response HEX Format Conversion:

• 21 Temperature: 0x21 = 33°C (valid range: -45°C to 85°C)
• 96 00 Outputs 4 Types of Values (Configurable via PC Tool): 0x0096 = 150
1. Default (0 for empty, 4095 for full): 0 to 4095
2. Height in Millimeters: Volume * 0.1 = 150 * 0.1 = 15.0 mm
3. Fuel Volume in Liters: Volume * 0.1 = 150 * 0.1 = 15.0 L
4. Fuel Change in Percentage: Volume * 0.1 = 150 * 0.1 = 15.0%
• A7 E7: Reserved Value - Can be ignored: 0xE7A7 = 59303