I currently used the sim300 kit with my atmega128 uniboard v1.1 . I burned the Chat program on the MCU and I connected the SIM 300 module with the UART0 of the MCU and connected the %V and GND pins of the module from the MCU 5v and grnd supplies .Also I tried powering it externally using a 7V battery.However the power led is the only one that glows with no network detection despite the fact that the simcard has been inserted.Please help
remove the controller board and power the gsm module.. you also specify what is the current rating of the power supply .. it should be 12Volts/1Ampere. check for ignition key on the board.. some modems have it....
Not getting anything upon connecting it to the hyperterminal and neither are any of the at commands working .Yes I measured the current its 1A of current.
I powered it externally using a 9V adapter and i am still using the same chat program which is being interface using uart0 of the atmega uniboard.This time I tried a different software instead of putty which seems to be the main problem behind the scene.Using Docklight now and the module is accepting AT commands now. However the network coverage still seems to be the issue .When i do AT+CSQ it returns +CSQ:30,0 and no sms or calls can be made.Please help me out :roll:
Your AT+CSQ is absolutely fine.. it means that the signal received by the module is good. that should not be a problem at all.. confirm that your SIM Is not password protected. try to make a call to the sim in the modem and see what is the response......
No the sim card isn't pass protected.I tried calling on the sim it says the number is switched off :| and besides tried sending sms it says +CMS 517 error neither is the Netwok LED blinking.
I had the same 517 error because in my case the sim card's voltage was not present (1,8V measure between pins 1 and 4 of the sim holder), the problem was false contact in the gsm module.