why my Ec25-A module does not work the MQTT commands?

I have tested it to be normal

1 Like

Good afternoon Herbet, try again and it sends me an error from the command AT + QMTCFG =? I don’t know what the steps are before sending MQTT AT commands.

Are you the result of manual execution or MCU program execution?
If there are still exceptions, I recommend that you manually debug through the module’s serial port.