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Hi nngohel,
Can you show me: How to SIM900B can detect dtmf from my mobile when i call to SIM900B:
Revision:1137B01SIM900B64_ST_ENHANCE
Send: AT+DDET=1
Return: OK
...Receive an incoming call
Send: ATA
Return: connection is successful
From my button of Mobile: i press "1" or "2"... but i...
Hi, everybody
When I send: AT+CGPSSTATUS? and AT+CGPSINF=32
SIM908 return in different times:
1: +CGPSSTATUS: Location Unknown
32,000000.000,V,0.000000,N,0.000000,E,0.00,0.00,000000,,E,A
2: +CGPSSTATUS: Location 2D Fix
32,102443.000,A,2058.493712,N,10545.750240,E,0.03,0.00,290912,,E,A
3...
I want to switch SIM card "hot",
i use at_command to check SIM card:
"AT+CPIN?\r"
i feel:
modulSIM900 can automatic to understand:
if ModulSIM has got SIM Card ("respond : +CPIN: READY") and ModulSIM work normally (call, send SMS...).
if ModulSIM hasn't got SIM Card ("respond ...
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