Hello all,Did anyone have this problem:GSM no responseRegistration 0Is there something else you have to do to get it to work?Ecave
Hi All,I am working with a iComSat V1.0 Shield with a SIM900 module on it and have a major problem working out how to control it's power and reset from within software.When the stack is initially powered up the Shield goes into a standby mode and requires you to press the power button on the shield to fully power up.Secondly, when the Arduino is reset, the Shield is not, again it has its own reset button.Has anyone found a way to override these buttons in software or, if need be, hardware?As the Arduino is running at 5V and the SIM900 at 3.3V I am reluctant to try and override the buttons with I/O pins directly.The application calls for the product to be inside a locked box so having to push buttons renders the shield useless in this application.
I could not get my shield working with the Arduino UNO. Are you able to provide any sample code as I keep getting "no response" and "SMS ERROR" when trying to send an SMS or do practically anything with it.It powers on, I hold the PWR button so then the STATUS LED displays. NET flashes every now and then but like I said I just keep getting "no response" every single time. I'm running serial and gsm at 9600 baud rate if that helps.
How do you have the jumpers set?
So if I'm using the Debug port I need to use a voltage divider on the RX Port of the gsm module?I can receive messages in Hyperterminal but I get no response to the commands I send.The Shield should already step down the voltages right?
fulvio I resolved the problem! the modul can communicate!
The DTR signal must be pulled to low level voltage when DTE is sending data to the module.Otherwise, the CTS signal may always not be asserted by module and the handshaking will not be established
I know that 2A is recommended; however I do not plan on making phone calls, just text and e-mail.