I have EC20 and EC25 modules.
I use at+qcfg=“band” to set lte band. it is working. however when I want to reset the band to default, the value “7FFFFFFFFFFFFFFF” is not working. I need to set the accurate value like “80080000dd” or “1e200000095”. but I don’t want to remember the default value of each different model. is there a general way to reset lte band to default value?
I also want to lock the connection type to “lte+wcdma” only. reading the
AT command manual, I only found AT+QCFG=“nwscanmode” and AT+QCFG=“nwscanseq”. but after browsing the quectel forum, I found there are more command like “AT+QCOPS” . where can I find these command?
Thanks for your inquiry in Quectel forum. About your question, please check the following answers. Thanks!
1.you can try to use the following command to reset the setting to default.
2.If you want to lock the connection to LTE+WCDMA, you just can try to use AT+QCFG=“nwscanseq”, the command AT+QCOPS cannot lock it, just can used for scan the current Available Networks. Thanks!
yes I have tried to use AT+QCFG=“nwscanseq”, to use the value “0403010205” or “0304010205” for locking. but I can not lock only “0403” or “0304”, the end “010205” must always there. or I miss something to lock only the sequence I want?
Please try to use AT+QPRTPARA=? to confirm whether the firmware can support it. If it return the error, it may can not support it, you can try to upgrade the firmware. Please email to email@example.com to get the latest firmware and upgrade tool.
Just as you have said that there is no such command can just lock LTE+WCDMA, the command nwscanseq just can specifies the sequence of searching network, and nwscanmode just can lock to LTE only or WCDMA only. Thanks!
I found another EC25-AU, and AT+QPRTPARA=3 is working fine. however I search the forum and it said that command should not be used too often, better use AT+QCFG=“nvrestore”,0. although that command is not there for EC25. I wonder why the documented lte band value “7FFFFFFFFFFFFFFF” won’t work. is there other value means “any band”?
and my EC25-AU have band below:
if I change the last value from “0x0” to “0x21”, how can I change it back?
at+qcfg=“band”,0,0,0,1 won’t do it. how can I write the value “0” to band settings?
yes I understand I should not use “AT+QPRTPARA=3”. since it not only reset the band but everything to default. I will remember the default value of every model if no common value like “7FFFFFFFFFFF” exists.(maybe the AT command document should be fixed since 7FFFFFFFFFFFFF is not working)
howerver I still want to know how to write “0x0” to band. some of the models default to “0x21” of tdsbandval.
I would like set all of them to “0x0” if possible.
Thanks for your suggestions, i will feedback your requirement to our R&D, they will confirm whether can add it. Thanks!
We do not recommend you to change the band setting, you should know that the module support which band not only depends on the AT setting, but also depends on the hardware design. Thanks!
thanks for your help. I didn’t add any extra band, but shrink the band to only what I want, I think it is ok? sometimes the band auto scan would cause trouble. in reality, I have a EC20 module can not connect to LTE in specific environment and condition, until I lock the band to correct one.