+QCSQ and +CSQ reports different signal strength

[bjorns]

Hello,

The following at commands are from the same device seconds apart.

+QCSQ: “eMTC”,-125,0,161,0
+CSQ: 25,99

QCSQ report -125 dBm and CSQ reports more reasonable -63 dBm (25). It worked good for a long time where QCSQ and CSQ reported the same values and suddenly QCSQ starts to behave bad. Whats going on? This started after the modem changed network and bearer technology. Also the value from QCSQ does not fluctuate it is constantly -125.

I have seen the following posts with similar but not exactly the same issue. But no answer or explanation.

BG95-M3, signal strength often unkown (QNWINFO, QCSQ,CSQ)

Hi all, we are using the BG95-M3 for our new product. In the past we used the BC95-G. With the BC95 the command “AT+NUESTATS” was used to get a signal strength from the module which worked very reliable. Now with the BG95-M3 we use the commant AT+QCSQ as well as AT+QNWINFO to get the signal stength. However, very often the signal strength is “0”, sometimes “-127”, sometimes a reasonable value we would expect between “-50” to “-120”. Can you please advice which commands to use with the BG95-M3…

BG95-M3 - Canada Provider

Hi, In the latest product specification of the BG95-M3 (https://www.quectel.com/wp-content/uploads/pdfupload/Quectel_BG95_Series_LPWA_Specification_V1.5.pdf) the provider for the Canada are: Rogers*/Telus* means under development/on-going/planning. Is there any update on the provider in Canada? Do I need to do a modem firmware update to support the new provider? I’m asking this question because I got a custom hardware with BG96 or BG95-M3 and only BG96 is able to get signal (AT+CSQ -> 23,9…

Please help me understand why I see this behavior.
Thanks
/Björn

[Linkin-Q]

@bjorns

QCSQ report -125 dBm and CSQ reports more reasonable -63 dBm (25). It worked good for a long time where QCSQ and CSQ reported the same values and suddenly QCSQ starts to behave bad. Whats going on? This started after the modem changed network and bearer technology. Also the value from QCSQ does not fluctuate it is constantly -125.

Hi @bjorns

Both QCSQ and CSQ are has time delay(not real time) to compared with network measurement. Its hard to say what’s going on without any modem log and AT command log. we suggest to collect modem log for us if this issue stucked your development.