Jul 11, 2013 #1 S sakibnaz Full Member level 3 Joined Jul 6, 2008 Messages 165 Helped 6 Reputation 12 Reaction score 6 Trophy points 1,298 Activity points 2,778 Hi all. I need to detect DTMF Tone from a Voice call using SIMCOM SIM900D Module. I found document "SIM900_DDET_Application Note_V1.01". As per the document I executed command AT+DDET=1, but SIM900D reply is ERROR. Any advise please, why Module reply is ERROR or how to achieve this DTMF detection (without using external chip)? Regards.
Hi all. I need to detect DTMF Tone from a Voice call using SIMCOM SIM900D Module. I found document "SIM900_DDET_Application Note_V1.01". As per the document I executed command AT+DDET=1, but SIM900D reply is ERROR. Any advise please, why Module reply is ERROR or how to achieve this DTMF detection (without using external chip)? Regards.
Jul 19, 2013 #2 A agreatstar Junior Member level 2 Joined May 14, 2012 Messages 20 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,283 Activity points 1,464 Execute AT+CGMR=? See what it says