Doing some development with an EG915U-EU module…
Using several different SIM cards, one of them constantly stuck with +CREG:0,0 or +CREG:0,2 - I just put in another SIM and it worked.
(I basically initialize the module and then wait for network registration, nothing special. With the EG91EX it worked and for a while it worked too with the EG915U.)
Now suddenly a few of my EG915U modules started to do this +CREG:0,2 constantly - with any SIM card. They can spend hours in that state and will not connect.
Those cards work well in phones or with other Quectel modules. It has been proven that it is not a faulty SIM card as I thought earlier.
And I also get this when doing AT+COPS:
CMD :: ModemSend (10) at+cops=0
X 00:15:59 MODEM :: <<< RD (052) +CME ERROR: Network not allowed emergency calls only
X 00:15:59 MODEM :: <<< RD (027) +CREG: 2,“0D85”,“005FD3D”,7
CMD :: ModemSend (9) at+creg?
X 00:16:04 MODEM :: <<< RD (029) +CREG: 2,2,“0D85”,“005FD3D”,7
X 00:16:04 MODEM :: <<< RD (002) OK
- Can a given piece of LTE module get permanently banned from network? (If yes, what is the reason exactly?)
- Can I reset somehow the internal non-volatile settings? (I got hints for some unpublished commands like AT+QPRTPARA but not working on EG915U.)
- I have tried to manually reset the scan and band configuration settings, no luck with that either…
- Many of the QCFG settings are disabled on the EG915U, why???
What can I do in order to get my EG915U modules working again?
Is there someone who has faced this kind of sutiation? If so, is there a solution?
Or should I stop using the EG915 as it seems to be unreliable…?
Thanks