SARA R5 function board appears to hang after an unpredictable amount of time

I’ve been experimenting with the SARA R5 using both LTE and GPS functionality. At unpredictable intervals (about a day or so) the board becomes unresponsive to commands over UART.

The problem is sufficiently rare that debug could be quite slow going…

Has anyone seen a similar problem? Initial attempts to use the reset pin to force the module to reboot haven’t worked (don’t yet know why, but it isn’t reconnecting in the way it does after a power cycle).

The SARA firmware is v 3.15.

Any thoughts are appreciated.

Doug

First thing I would double-check the code and/or settings and make sure that some log/other kind of buffer isn’t filling up after X

Well, there is very little code. So far, I’m just sending gps coordinates to an MQTT broker and not storing anything locally. Obviously, there could be a problem in my code, but it’s hard to find with a rare, intermittent problem.

So far, the work around is to detect the failure, then use the micro to power-cycle the SARA. Ugly…

I’m still struggling with the SARA R5. I’m (sort of) OK with a power cycle to rescue a lost connection, but, unfortunately I’m having some difficulties with the board not always reconnecting after a 30 second power down. (Hologram SIM)

I’m not very familiar with the connection sequence that cellular IOT devices go through, so I’m wondering if I am missing some obvious “gotcha’s”. At this time, I’m simply following sparkfun example code to get the connection going.

Are there any obvious traps that a cellular IOT beginner might be missing?

I’m seriously thinking about getting another SARA R5 board to see if it behaves the same way…

Doug