# LTE strength

Source: https://forum.modalai.com/topic/165/lte-strength
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2021-03-25 19:41:20 UTC by Aldo Castro Freire
Replies: 10 · Views: 1643

## Aldo Castro Freire · 2021-03-25 19:41:20 UTC

Is there any advice or method to measure the lte strength that my module is able to receive?

## Reply by tom (ModalAI staff) · 2021-03-25 21:07:45 UTC

You can use a variety of AT commands in order to read / write to the modem. One command that we often use to query signal strength is `AT+QENG="servingcell"`. You can send this command and read the output to the terminal all in a single command using `echo -ne "AT+QENG=\"servingcell\"\r" | busybox microcom -t 1000 /dev/ttyUSB2`.

## Reply by Aldo Castro Freire · 2021-03-31 19:52:05 UTC

thank you I will try that

## Reply by Aldo Castro Freire · 2021-04-12 16:55:03 UTC

@tom said in [LTE strength](/post/744):
> busybox microcom -t 1000 /dev/ttyUSB2.
> 
> 

Hi just one question what does this mean ? :   busybox microcom -t 1000 /dev/ttyUSB2

## Reply by tom (ModalAI staff) · 2021-04-12 16:59:10 UTC

@Aldo-Castro-Freire [microcom](http://manpages.ubuntu.com/manpages/bionic/man1/microcom.1.html) is a program that can be used to talk to devices over a serial port (`/dev/ttyUSB2`). It handles sending AT commands to the modem cleanly.

## Reply by Aldo Castro Freire · 2021-04-12 17:05:46 UTC

I also have another modem that is 5g that I would like to connect to the microusb? what device would that be ? it would be ttyUSB1 ?

## Reply by tom (ModalAI staff) · 2021-04-12 17:29:40 UTC

What 5g modem are you attempting to use? The drivers would need to be integrated into the kernel in order for it to be recognized.

## Reply by Aldo Castro Freire · 2021-11-01 19:39:35 UTC

I am getting "ERROR" when running this command

## Reply by tom (ModalAI staff) · 2021-11-02 16:42:54 UTC

Check here for Sierra's AT command documentation: https://source.sierrawireless.com/resources/airprime/software/airprime_wpx5xx_wp76xx_wp77xx_at_command_reference/

## Reply by Aldo Castro Freire · 2021-11-03 18:07:38 UTC

I am not sure but none of the commands are running.
Also, it does not have the command AT+QENG for me to check out

## Reply by tom (ModalAI staff) · 2021-11-03 18:36:58 UTC

Can you show an example output of what you are seeing? Also, which modem are you using?