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GT02 Protocol Tracking Devices: Features and Compatibility
The GT02 protocol is one of the most widely used communication standards for budget-friendly GPS trackers. Whether you are using a generic GT02 or a branded TR02, these devices offer reliable vehicle tracking via SMS and GPRS. Below is a breakdown of how these common models compare.
GT02 vs. TR02 Comparison Table
| Feature | GT02 Standard | TR02 Model |
|---|---|---|
| Protocol Type | GT02 (Port 5022) | GT02 (Port 5022) |
| Communication | GSM / GPRS | GSM / GPRS |
| Voltage Range | 9V – 36V DC | 9V – 36V DC |
| Typical Port | 5022 | 5022 |
| Key Use Case | Basic Fleet Tracking | Motorcycle & Car Tracking |
| Reliability | Standard | High (Often OEM) |
Specific SMS Configuration Commands
To configure GT02 or TR02 devices using the GT02 protocol (typically on port 5022), you must send a sequence of SMS commands to the phone number of the SIM card inside the tracker.
1. Essential Configuration Commands
The following commands use the default password
666666. If you have changed your password, replace 666666 with your custom 6-digit code.- Set APN (Internet Access):
- Format:
APN,666666,apnname# - Example (using generic APN):
APN,666666,internet# - Note: If your carrier requires a username and password, use:
APN,666666,apnname,user,password#.
- Format:
- Set Server IP and Port:
- Format:
SERVER,666666,0,IP,Port,0# - Example (for port 5022):
SERVER,666666,0,123.123.123.123,5022,0# - Note: The
0after the first comma indicates an IP address; use1if you are using a Domain Name (DNS).
- Format:
- Set Reporting Interval:
- Format:
TIMER,666666,,seconds# - Example (for 30-second updates):
TIMER,666666,,30# - Note: The minimum interval is typically 10 seconds.
- Format:
2. Status and Troubleshooting Commands
- Check Parameters: Send
PARAM,666666#(or justPARAM#on some models) to receive a reply containing the current IMEI, IP address, and APN settings. - Check Working Status: Send
STATUS#to see current GPS signal strength, battery level, and GPRS connection status. - Reboot Device: Send
RESET,666666#to restart the terminal if it is not connecting. - Factory Reset: Send
FACTORY,666666#to clear all custom settings and return to default.
3. Location Query (SMS Mode)
If GPRS is not working, you can still get the location manually:
- Get Coordinates: Send
WHERE,666666#. - Get Google Maps Link: Send
URL,666666#.
Important Tips:
- Format: Ensure there are no spaces unless explicitly required, and always end with the
#symbol. - Case Sensitivity: Most newer models are not case-sensitive, but using UPPERCASE is recommended for compatibility.
- Reply: The device should reply with “OK” or “Success” for each command. If it doesn’t, check if the SIM card has enough credit to send SMS.
Why Use the GT02 Protocol?
Most tracking platforms support the GT02 protocol natively. Because it uses a lightweight data format, it is ideal for minimizing data consumption on SIM cards while providing real-time location updates.
