Hello Team,
I am working with a Quectel EC200U-CN module and want to implement DTMF tone detection during a voice call. I know it functions with this modem, but I am unsure which version does.
I’ve tried the command as per the manual:
AT+QTONEDET=1
But it returns:
+CME ERROR: 58
Model: EC200U-CN
Current Firmware: EC200UCNAAR02A09M08
Please provide me with the latest firmware that supports DTMF detection and all other AT commands. Also provide me steps to upgrade the firmware. Any video manual will be much appreciated.
.
Thanks in advance!