I have problem with GSM module

[Yousuf Yamani]

I have problem with GSM module which as in this site:
http://www.aliexpress.com/item/New-S...282557094.html

The idea of program is when I run the pic the led will light 5 times (i didnt attached this function in the picture), after that when I press the key the GSM will call me, then send a message written on it "testing", but unfortunately the GSM didnt call me.

I connected GSM module to the pic16f628a as in the picture


And this the code




Also I attached the code as a text file.

 

[donkey]

might be a good idea to send pic of the project, it could be as simple as a loose wire or sim card not being inserted properly, right through to the wire hookup for the micro or programming

 

[jayanthd]

Hi

The power from a PICKit 3 is not sufficient to power the SIM900. PICKit 3 will be connected to USB of PC and USB can only provide 500 mA current but SIM900 requires 2.5A burst current (100 ms to 200 ms) while sending SMS. I am not sure how much current SIM900 requires when calling but I think even if it requires 200 mA to 300 mA then PICKit3 will not be able to provide it from its USB soucrce. So, use a external power supply (5V) for the SIM900 and try.

One more thing don't forget to debounce your switch in the code.