I am using an Arduino UNO and a SIMCOM SIM900 GSM/GPRS Shield My code works and uploads and is shown below: However when I open the serial monitor I get this message: Serial Started. DB:NO RESP DB:NO RESP DB:NO RESP Trying to force the baud-rate to 9600 1200 2400 4800 9600 19200 38400 …

Problems with SIMCOM SIM900 GSM/GPRS Shield DB No Resp

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