Arduino Forum

Products => Arduino GSM Shield => Topic started by: merci on Jul 18, 2015, 09:42 am

Title: upload code to arduino when sim900 plugged
Post by: merci on Jul 18, 2015, 09:42 am
I uploaded the code to arduino when the sim990 plugged on it,, now the sim900 not works, even just for check the IMEI , it doesn't works, the result: no modem answer,,
I have read on the article, when upload the code, better to unplug the sim900,,
how to fix it? please help

I use arduino uno & ICOMSAT V1.1 sim900 as the GSM shield
Title: Re: upload code to arduino when sim900 plugged
Post by: ProfRon on Aug 02, 2015, 01:21 pm
I would. Separate the two modules. Then establish that the Arduino is not damaged by loading in a couple of basic scripts like "blink" or something.

Then power up the GSM separately with a valid SIM card (no PIN number) in of course  and see if it logs on to a network. Watch the flashing LEDs.
THEN
Can you phone it and get a dialling tone??? If you can then it is probably not damaged.

If the GSM module doesn't light up at all then there is a more serious issue.

Try again to join them up.

Good luck