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Advanced Guide: TR900 Protocol & NEO2 Configuration
The TR900 protocol is the industry standard for high-reliability data transmission. This guide covers the integration of TR-900, NEO1, and the advanced NEO2 model using Port 5074.
1. Device Specification Matrix
| Model | Interface | Port | Protocol | Fuel Monitoring |
|---|---|---|---|---|
| TR-900 | OBD-II | 5074 | TR900 | CAN-Bus Data |
| NEO1 | 4-Wire Hardwire | 5074 | TR900 | Digital On/Off |
| NEO2 | 12-Pin Multi-Wire | 5074 | TR900 | Analog (0-5V/RS232) |
2. Technical Wiring Diagram (NEO2)
NEO2 Multi-Pin Configuration
- Red Wire: Positive Power (12V-36V)
- Black Wire: Ground (GND)
- White Wire: Ignition Sensing (ACC)
- Yellow Wire: Fuel/Power Cut-off Relay Control
- Blue Wire: Analog Fuel Sensor Input (AD1)
3. NEO2 Fuel Sensor Calibration
The NEO2 supports high-precision fuel monitoring via analog voltage. To calibrate the sensor, you must define the “Empty” and “Full” voltage values using SMS commands.
Important: Ensure your fuel sensor is correctly grounded to the same ground as the NEO2 to prevent voltage fluctuations.
Step 1: Check Current Fuel Voltage
With the tank empty, send the status command to see the current AD value:
STATUS#
Step 2: Calibrate Empty Tank (Example at 0.5V)
FUEL,0,0.5#
Step 3: Calibrate Full Tank (Example at 4.5V)
FUEL,100,4.5#
Step 4: Set Reporting Interval
To receive fuel data updates every 30 seconds while moving:
TIMER,30#
4. Essential SMS Setup Commands
Note: Default password is 123456.
Server Configuration
SERVER,1,://yourserver.com,5074,0#
APN Setup
APN,://provider.com#
Remote Engine Immobilization
- Cut Fuel:
RELAY,1# - Restore Fuel:
RELAY,0#
- Cut Fuel:
5. Summary
By leveraging the NEO2 with the TR900 protocol on Port 5074, you gain access to professional-grade fleet metrics. Proper calibration of the blue analog wire is the key to accurate fuel consumption reporting and theft prevention.
