To find the required modem value for the “Send Message” API endpoint, you can use the following command on your RUT955 device CLI:
ubus call mctl list
In the command output, look for the “usb_id” parameter. This value indicates the modem identifier and typically looks like 1-1 or 3-1. Use this value as the modem parameter in your API request.
If you need further assistance, feel free to reach out.