Manual

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 369 2015-08-03
+DTMF:1
//report DTMF value
+DTMF:2
+DTMF:3
Receive an incoming call ATA OK
If module detected DTMF,
URC will be reported via
serial port
+DTMF:1
//report DTMF value
+DTMF:2
+DTMF:3
+DTMF:4
enable DTMF detection AT+DDET=1,1000,1
//start DDET, interval
is 1000ms, report
mode is 1
OK
Set up a call connection ATD***********; OK
If module detected DTMF,
URC will be reported via
serial port, the minimal
interval between two identic
DTMF is 1000ms.
+DTMF:1,160
//report DTMF value
and last time
+DTMF:2,300
+DTMF:3,200
Receive an incoming call ATA OK
If module detected DTMF,
URC will be reported via
serial port
+DTMF:1,160