Hi. In TRM240 configuration i change message format to the text mode AT+CMGF=1. Then i save configuration using command AT&W. When i restart terminal TRM240, message format is back to the PDU mode 0. What i did wrong ?
Since the TRM240 is not running any of our software, the issue is either in the configuration or the modem firmware.
Could you try using the command AT&F, which will restore the internal modem to the factory defaults and check if the issue persists?
I will also ask you to run the command AT+GMR to identify the firmware version of your device.
restoring the modem to factory settings does not solve the problem
TRM240 firmware version