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MaJerle / lwcell

Lightweight cellular modem host AT library
MIT License
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dtmf #20

Open atulgo opened 4 years ago

atulgo commented 4 years ago

Detection of DTMF tones - SIM800L module.

I get "OK" when I send 'AT+DDET=1,1000,1,1* ' over uart . But it doesnt seem to detect anything afterwards. Perhaps I am doing something wrong. Would appreciate some feedback.

regards Atul ref : *SIM800 Series_AT Command Manual_V1.09

MaJerle commented 4 years ago

What do you expect to get? OK seems correct answer to this command.

atulgo commented 4 years ago

ya ...OK is fine. But its afterwards that i face problem. Because DTMF is not being detected. This is what happens :

  1. Put sim 'A' in modem.
  2. Connect to modem over serial using Minicom.
  3. Turn on DTMF detection.
  4. Initiate a call to modem using a mobile phone.
  5. Dial the digit (1,2.... etc) from the phone.
  6. Nothing appears on serial port