How to get the signal strength value of NB quickly after power on

RE: How to get the signal strength value of NB quickly after power on

Carl Richard — Fri, 26 Feb 2021 11:57:43 GMT

I understand. The issues you are seeing, are they only on the client board? NB-IoT is a quite slow protocol and it can take some time to establish connection, especially if the reception is bad.

Anyway, based on the code you posted initially I see that you're using "at_cmd_write" directly. I'd recommend that you'd rather use the LTE link controller for initiating the LTE connection. It handles all responses from the modem properly and could help with stability.

Best regards,
Carl Richard

RE: How to get the signal strength value of NB quickly after power on

duxinglang — Wed, 24 Feb 2021 10:02:18 GMT

My application is the same, only the hardware board is different, one is the DK board, one is the client board.

In addition, I found that when the terminal was registered to the NB network, there was too much delay in the w_lte_lc_connect function, which caused my application to almost stop for a few seconds. Is there any way to solve this problem?

RE: How to get the signal strength value of NB quickly after power on

Carl Richard — Mon, 22 Feb 2021 15:30:55 GMT

Hi!

I'm not sure if I understand you correctly here, but the reported signal strength will always be 255 before a connection. Could you elaborate a little on your application:
- You're saying that you are using two different boards, is one DK and one a custom board?
- What are the differences between the applications you are using?

Best regards,
Carl Richard