GSM Header hang-up

Using Arduino Programming Questions
1

Hello,
I am trying to do something with the GSM modul and using the GSM.h for it.
But sometimes by:

if(gsmAccess.begin(PINNUMBER)==GSM_READY) &
      (gprs.attachGPRS(GPRS_APN, GPRS_LOGIN, GPRS_PASSWORD)==GPRS_READY)

the program just hang-up and doesn't go on. I just can go on if i reset the arduino or load the program again in.
Sometimes it just works without any problems.

Maybe anyone got the same bug and knows what to do/change?

Thank you :slight_smile:

2

I am trying to do something with the GSM modul

Which GSM module?

& is the bitwise AND operator. You want &&, the logical AND operator.

3

Thank you Paul, but i already used && just copied wrong.

I searched in the forum and found some persons who have the same problem.

Obviously it's too much work at the same time and so the arduino just hangs-up.

The problem can be solved with a delay between the two requests, which you also can see in this post:

http://forum.arduino.cc/index.php?topic=171435.0

Thank you anyway :slight_smile:

4

Search for other solutions..

Would suggest delay is wrong approach..

Look at synchronisation you neeed to read reply..