Hi,
First time I am trying to connect GSM modem (SIM300) with microcontroller. First I am trying to communicate SIM300 with my PC through RS232 port. I am using hyperterminal to send AT commands to SIM300.
Problem I am facing is, my each command is getting echoed back i.e If I type AT<cr> it gives me AT<cr> back. But I think modem should respond with OK.
Can anybody help me why is this happening...?
Regards, Hari
Why is it that you haven't checked previuos forum threads about this?
You really do believe the SIM300 module is in error? What does Google say about GSM modules - or modems in general - that echoes received data? What conclusions do you make from all other threads about this on this site?
Thanks for response!!!
I am not doubting that sim300 is in error, as it was tested by third party.
I have checked some previous forum, they say module should respond with OK. But as I am only getting echo from the module I have started this thread.