Modem attachment refusal
We're running what we think are the latest gpy/modem firmwares
>>> import sqnsupgrade; sqnsupgrade.info() <<< Welcome to the SQN3330 firmware updater [1.2.6] >>> >>> GPy with firmware version 1.20.2.r4 Your modem is in application mode. Here is the current version: UE184.108.40.206 LR220.127.116.11-48829
This printout is always followed by a core dump which doesn't inspire much confidence in the latest firmwares but that's another matter.
The modem won't attach
>>> from network import LTE >>> lte=LTE() >>> lte.attach() >>> lte.isattached() False
https://docs.pycom.io/tutorials/networks/lte/ says this is because the cereg might be wrong (latest formware needs cereg=1), so we checked
>>> lte.send_at_cmd('AT+CEREG?') '\r\n+CEREG: 1,0\r\n\r\nOK\r\n'
This modem was working fine till we tried lte.attach(band=28), which is the catM1 band in AU, to try to speed up first time attachments (suggested at https://docs.pycom.io/tutorials/networks/lte/). It hasn't attached since!
We tried to backup out of the hole of yet another failed modem
>>> lte.factory_reset(debug=1) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: function doesn't take keyword arguments >>> lte.factory_reset() Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: the requested operation failed
We tried reloading the 48829 firmware into the modem, still won't attach. Any one think of something else we might try to get attachment working again?