How to set lte band

IoT Modules LTE Standard Module
1

Hi:
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 a lot for your help!!

10

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!

11

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.

12

Please note that the module scan will not cost long time except the network have some issues, lock band may be can help you sometimes, but it can not solve your root issue. Thanks!

13

Yes. all these are prepare for exceptional condition under mass deployment.

14

AT+QCFG=“band”
+QCFG: “band”,0x260,0x5,0x0
i get this whta this mean

15

Hello,

Is there a tool to use to calculate the AT+QCFG=“band”?

This is what I found, but I do not know they arrived at the command.

I have a EC25 and I want the module not to use B2.

I want to use B12 and B71.
I found this for Band 4 and Band 12 AT+QCFG=“band”,0,808,1

How can I add Band 71 to it?

Thank You, Wally

16

AT+QCFG=“band”[,,,] (0 = No change)
e.g.: 0x15 = 0x1 (LTE B1) + 0x4 (LTE B3) + 0x10 (LTE B5)
eg.: 0x80005=0x1(LTEB1)+0x4(LTE B3)+0x80000(LTE B20)
0x400000000000000000 (LTE71) + 0x800 (LTE12) = 0x400000000000000800 so put AT+QCFG="band"0,400000000000000800,0

1 Like
17

Please also see my post on this topic: Can someone explain how command AT+QCFG="band" works?(ec200t) - #2 by snowgum

18

I made a spreadsheet, below, however limitations with Google Sheet’s functions (numeric precision?) means the maximum LTE channel this calculator can handle is B39. Perhaps a smarter person can evolve this sheet, but the basics are here.