Cobra and Telit communication problem

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1

I have Fez Cobra board connected to Telit GM862-QUAD through COM3 on Cobra(but whatever I use, behavior is same), and beside other, I have communication problem in runtime.

While Cobra is connected to debugger, I have serial communication between devices. But when start application in runtime, it is not communicating with gm862. I log data, and seems that I send data to module, but it is not respond.

I tried to wire both, 3.3 and 5v fez outputs to VCC_BRD on GM862, but same results.

So, in debug, everything works fine, but after restart, it stops.

I use this board for Telit: SmartGM862 Board - MikroElektronika

2

Make sure you Open serial port first and then subscribe to the events. If that doesn’t help show us some code.

3

Mr. Architect, this solved my problem. Thank you very much.

4

You are welcome!