Can reliably hang GPY on expansion board with the following

[timh]

Hi

I have a GPY on expansion board 2.
Have been trying unsuccessfully since last week to get LTE running ;-) Have tried everything outlined in various form posts and have contributed to that discussion ;-(

Just upgraded to latest firmware and have found a repeatable hang on the system necessitating a hard reset.

  (sysname='GPy', nodename='GPy', release='1.17.2.b1', version='v1.8.6-849-1bf377b on 2018-03-16', machine='GPy with  ESP32')

Essentially the problem repeatable by performing the following steps.

from network import LTE
lte = LTE()
lte.send_at_cmd('AT+COPS=?')   # ineteract with the modem via send_at_cmd
import time

At this point the system will hang until a reset.

Crtl-C won't interrupt nor any other sequences sent through the console.

[timh]

@seb Problem ceased with the latest firmware.

[bali]

@timh @seb

My GPY hangs when i call lte = LTE(). I'm stuck with this for weeks already, even on 1.17.3.b1.

[timh]

@seb Yes. I am only interested in CAT-M1 and have confirmed with Telstra they are for CAT-M1 (see discussions re: telstra).
Irrespective I don't believe the system should hand when importing time module.

Any send_at_cmd performed before importing time will hang the current firmware.

Have you tried it ?

Thanks

T

[seb]

Are you trying to connect to regular LTE? Our modules only support LTE CAT-M1 and NB-IoT, these a lower power protocols that differ from regular LTE.