I had just bought the ‘Trizium Evaluation Board - RS232’ from Sparkfun. Apparently, I understand that the Trizium module is a SMD version of the GM862 module and that the evaluation board has a build-in power supply, RS232 level shifter, on/off button and a SIM card adaptor.
I connected a 5VDC wall wart power supply to the evaluation board and connected a serial cable from the board to my PC COM1 port. I then started a terminal software in my PC with the following settings - COM1, 9600 bps, 8 bits, No Parity, 1 Stop bit. When I press the on/off button on the evaluation board the message in the hyperterminal is <0>.
I tried sending the command ATZ but the same ATZ message is echoed back and then no response. I was expecting OK response from the board.
I then tried ATD 12345678 command to dial out but the board just echo back the same message that I send and then no response. After sending the message ATD 12345678 a few times the board send back ERROR message.
Please give me some guidelines how to start as I am new. I am totally lost.
HC Wong