FMC125 Pgm Number impossible to modify

[geff.lang]

Hello,

We’re currently unable to change the PGM number on a Teltonika FMC125 device connected to an All-CAN300 module. We’ve attempted the change via FOTA and MQTT, but the update does not take effect.

The current response from the device is:

“RSP”: “LVCAN ProgNum: 12672”

We are trying to change the PGM number to 15173, but the device does not apply the new value.

Do you have any suggestions or methods to force this change successfully?

Thank you in advance for your support.

Best

Geff

[laith.sa]

hello
Good day!

you need to send with the structure:
lvcansetprog #

for example:
12345 12345 lvcansetprog 15173

BR
laith

[geff.lang]

Hi @laith.sa

Thanks for your response. It seems that the command you provided is intended for SMS, whereas we’re communicating via MQTT, and my example was an MQTT command.

Do you have any alternative suggestions we could try?

Best regards,

[laith.sa]

hello @geff.lang

Sending Commands Using MQTT Protocol with Teltonika Devices

To send commands to Teltonika devices using the MQTT protocol, follow these steps:

1. Subscribe to the device’s command topic:

• Subscribe to the topic name: DeviceIMEI/commands
• This allows you to monitor command-related communications

2. Publish commands to the device:

• Select “Publish to a topic” in your MQTT client
• Enter the topic name: DeviceIMEI/commands (replace DeviceIMEI with your actual device IMEI)
• Format your command in the Message payload using this JSON structure:

{"CMD": "<Command>"}

• Press Publish to send the command

3. Receive command responses:

• The response to your command will be shown in the Data topic (DeviceIMEI/data)
• Responses are received in JSON format

Example Command Format

{"CMD": "lvcansetprog 15173"}

[1] FMB003 Getting Started with AWS IoT Core - Teltonika Telematics Wiki

For a complete list of available SMS/GPRS commands, you can refer to the SMS commands list on the Teltonika Wiki. The commands are sent using the same JSON structure shown above.