Weird problem with Serial.print in the main loop

Projects Programming
1

Hi All!

I have a problem with the hardware Serial.print. I'm using the example sketch GSM_GPRSLibrary_AT.ino from gsm-shield-arduino:

http://code.google.com/p/gsm-shield-arduino/source/browse/branches/SIM900IDE100/examples/GSM_GPRSLibrary_AT/GSM_GPRSLibrary_AT.ino

Serial.print prints just fine from inside the SIM900 class but it doesn't print anything from the main loop / setup function.

Am I missing something?

I'm using the following configuration:

MacOS X

Arduino IDE 1.0

Seeeduino Stalker 2.1

Seeeduino GPRS Shield

Thanks!

2

The device works by serial commands, unless you have more than one serial (one for the GSM, another for debug) it will turn out to a mess if you use the same serial port for two things.

3

Hi fuh, thanks for your reply, i'm not using the same serial port, the communication with the GPRS shield uses softwareSerial ( pins 7 and 8 )

Thanks!

4

The link you posted is the code that doesn't work ? Or is it the example were you're using as a base for your code ?

5

i'm not using the same serial port, the communication with the GPRS shield uses softwareSerial ( pins 7 and 8 )

That's not what you indicated earlier:

Serial.print prints just fine from inside the SIM900 class but it doesn't print anything from the main loop / setup function.

You need to post your code

6

I'm using exactly that code, the Serial.println in line 28,32,33 doesn't print anything, Serial.println in line 67 works fine

Maybe because in Arduino 1.0 the Serial is asynchronous? So maybe the SIM900 library is doing something, but all seem fine.

Thanks