SMS Configuration

🔧 Basic Configuration via SMS

1. Insert SIM Card

• Insert either an open SIM or an M2M SIM card into the device.

• If using M2M SIM, ensure the required IP or URL is whitelisted on the operator portal for uninterrupted data communication.

2. Configure the APN

Set the APN according to the SIM card being used:

SET CUAPN:M2MISAFE.com     → (For VI M2M SIM)

SET CUAPN:airtelgprs.com    → (For AIRTEL)

Expected Response:

APN:M2MISAFEcom

✅ Ensure the APN response matches the command sent.

3. Verify Network Status

Send the following command to check network registration and signal strength:

GET CUNWI

Response Format:

CUNWI:<Operator Name>-<MCC>-<MNC>-<GSM Status>-<GPRS Status>-<Signal Strength>-<GSM Loss Timer>-<GPRS Loss Timer>

Parameter	Description
GSM Status	1 = Registered, 2 = Searching, 3 = Denied, 5 = Roaming OK, 0 = Not registered
GPRS Status	1 = Registered, 2 = Searching, 3 = Denied, 5 = Roaming OK, 0 = Not registered
Signal Strength	Range: 1–31 ASU
GSM/GPRS Loss Timer	Elapsed time in seconds since network loss

✅ Check for registration status and reasonable signal strength before proceeding.

4. Enable Data Transmission

To enable telemetry data transmission to your backend:

SET CUENIP:<IP_Mode>.<State>,<IP_Mode>.<State>

• IP Mode: 0 = Transight, 1 = Customer

• State: 1 = Enabled, 0 = Disabled

Example:

SET CUENIP:1.0

✅ This enables Transight server and disables Customer server by default.

5. Configure Server IP/URL

Set the backend server endpoint using TCP or HTTP:

SET CUURL:TCP:<IP>:<PORT>

SET CUURL:<HTTP URL>

Examples:

SET CUURL:http://livedata.example.net:6000/data

SET CUURL:TCP:15.235.9.66:50334

Expected Response:

URL:http://livedata.example.net:6000/data

URL:TCP:15.235.9.66:50334

✅ Verify response matches the server details.

6. Set Data Transmission Frequency (CUUR, CUURT, CUURS)

Configure reporting intervals for different operational states:

Mode	Purpose	Command Format	Unit	Example	Expected Response
Motion	When vehicle is moving	SET CUUR:<seconds>	Seconds	SET CUUR:30	CUUR: 30
Halt	When vehicle is stationary	SET CUURT:<minutes>	Minutes	SET CUURT:30	CUURT: 30
Sleep	In low-power/idle state	SET CUURS:<minutes>	Minutes	SET CUURS:30	CUURS: 30

✅ Ensure each setting reflects correct values as per use case.

7. Save Configuration – Restart the Device

After all settings are done, reboot the device to apply changes:

SET CUMR:2

✅ The device will restart and save all configurations.

✅ Final Validation

• Ensure data is being received successfully on your backend server.