Get the RSSI value with nRF9160

RE: Get the RSSI value with nRF9160

JONATHAN LL — Fri, 08 Jan 2021 12:55:29 GMT

Hi Adeel,

I might suggest that you create a new Devzone case, but the asset tracker example dose use the RSRP value and sends it to the cloud, start looking at that.

Regards,
Jonathan

RE: Get the RSSI value with nRF9160

Adeel — Thu, 07 Jan 2021 16:04:25 GMT

Hi Jonathan,

I assume this post is quite old but it is of use to me. I am trying to get the RSSI value through the AT command : AT+CESQ :

+CESQ: 99,99,255,255,18,36

I get this response and I wanted to store this RSSI calculation value (36) in a variable. 
My main use is that I need to print the RSSI value explicitly and send it over MQTT. 
Could you guide me as to how to do it ? Is there a sample code that I could use for it ?

Regards,
Adeel.

RE: Get the RSSI value with nRF9160

JONATHAN LL — Wed, 12 Aug 2020 11:35:12 GMT

In the latest version of the AT command Guide v1.3 the following is noted:

The +CSQ command reads 2G and 3G signal quality.

Note: Not detectable, RAT not supported. Use +CESQ and %CESQ for E-UTRA signal quality

It is not supported to read the RSSI value thus the reason why you get 99,99

from the AT command guide:
99 – Not detectable

Since the nrf9160 uses 4G (LTE-M)

Hope this explains the reason why

Regards,
Jonathan

RE: Get the RSSI value with nRF9160

WassimZ98 — Wed, 12 Aug 2020 10:23:39 GMT

Thanks for the answer. But I don't want RSRP, instead I am interested on RSSI.

RE: Get the RSSI value with nRF9160

JONATHAN LL — Wed, 12 Aug 2020 07:03:41 GMT

Here is a link to another devzone question:

https://devzone.nordicsemi.com/f/nordic-q-a/42241/nrf9160-zephyr-ncs-zte-m-nb-iot-cell-tower-rssi

RSRP is the reference signal received power (RSRP).

example:
The last number (40) is the RSRP

>> AT+CESQ
<< +CESQ: 99,99,255,255,23,40
<< OK

This gives us -140dBm + 40 = -100dBm

nrf9160 AT Commands, Command Reference Guide :
Ref https://infocenter.nordicsemi.com/pdf/nrf91_at_commands_v1.0.pdf

Regards,
Jonathan