Trouble Dropping GSM Connection With No Recovery

[PhysicsUofRAUI]

I have been having trouble with the Arduino MKR GSM dropping the connection to the Arduino IoT cloud and not being able to recover.

I was thinking that it must be the connection to the antenna, so I tried putting dielectric grease on the connection of the antenna. That seemed to help, but I still have had a few times the connection has dropped and failed to reconnect.

I am thinking it is similar to this issue: arduino-libraries/MKRGSM#66.

I think it might be fixed by adding

static int const GPRS_TIMEOUT = 30000;

to the constants in src\Arduino_GSMConnectionHandler.cpp, and then

_gprs.setTimeout(GPRS_TIMEOUT);

directly under

_gsm.setTimeout(GSM_TIMEOUT);

In the implementation of GSMConnectionHandler::update_handleInit() in the same file as mentioned before.

This is what I am planning to try anyways.

I am not that experienced with regards to GSM communication, so if someone has a better idea to try and fix the problem I've been having I'd like to hear it.

[PhysicsUofRAUI]

Adding the two lines of code is working for me at the moment. I am currently running two MKR GSM units in different locations doing different things. One unit is in an area with good cell service and the other one has bad cell service. If they both run without outside intervention for the next two weeks I am going to guess that this was the problem.

Could the library be changed to either let the user set these timeouts, or so that this timeout is set the way I set it.

I would be willing to make a pull request for this.

[aentinger]

Hi @PhysicsUofRAUI 👋 ☕

Thank you very much for your report. Would you be willing to supply a PR with - for a start - internally defined timeouts?

[per1234]

Closing as fixed by #61

Based on comment here:
#61 (comment)