We have in the past designed two IoT boards – one using the BG600L and another using the BG770A. On both boards, we occasionally experience issues with reconnecting to the network, especially after the device has been moved. We primarily use SIM cards from 1NCE.
In both cases, we identified that the issue often seems to be related to cached cell data or SIM-related presets. We have found that executing specific AT commands helps to resolve these issues. For example:
On the BG600L, we use commands such as AT+QCFG="simeffect", AT+QNVFD, etc.
On the BG770A, we use commands like AT+QCFG, among others.
These commands have proven effective in many cases.
My question:
For a new board with teh EG912U Is there a similar set of AT commands for the EG912U that can be used to clear cached cell information or reset/ignore SIM presets – similar to what we used on the BG600L and BG770A?
could you please clarify which exact commands can be used on the EG912U?
From the manual, I noticed that the available commands differ between the various modules.
Background:
Our company develops tracking solutions for different networks (LTE-M/NB, LTE Cat 1, with or without 2G fallback). This is why we use different modems (BG700L, BG770A, EG912U, etc.). Not all providers or networks support PSM modes, so our loggers are designed to deregister from the network during sleep and, if not moved, in order to achieve operating lifetimes of up to 10 years.
Sometimes, we encounter issues when crossing network technology borders (e.g., from Germany’s LTE-M to the Czech Republic, which has LTE-NB but no LTE-M) or with certain SIM cards (e.g., occasionally 1NCE SIMs in KPN networks).
As a “hard” approach, we try to clear as much cached or preset data as possible to force the modem to re-register after a certain number of errors (usually after one day and more than five errors). This seems to work with the BG600L and BG770A.
My question: Which exact commands can be applied for the EG912U?
Are there any specific documents or command lists available? This would be a great help.
Hi Mikey,
thanks for your mail. But in the regular “AT-command-manual”, as you sent, there is no info about special commands like (for BG600L/BG770A) AT+QCFG="simeffect" , AT+QNVFD or AT+QCFG that could be used to “force” the manual to register in cases of failures.Since it is very difficult to find solutions “ad hoc”, it would be very worthful to have these implementes in advance
" My question:
For a new board with the EG912U Is there a similar set of AT commands for the EG912U that can be used to clear cached cell information or reset/ignore SIM presets – similar to what we used on the BG600L and BG770A?"
I think I remember, there was a similar question a few months ago for another modem family from another user and for these modems such a list of commands existed, but I can not find this post any more…
