WM620 AT
Command Manual
Copyright © Neoway Technology Co., Ltd
29
3 Network Service Commands
3.1 Querying Signal Quality: +CSQ
Description
To check the receiving signal strength indication (RSSI) and the bit error rate (BER)
of the channel
Format
AT+CSQ<CR>
AT+CSQ=?<CR>
Parameter
N/A
Return Value
<CR><LF> +CSQ: < signal >, <ber><CR><LF>
<CR><LF> OK <CR><LF>
< signal >
The following table shows the relationship between the signal and the RSSI.
signal
rssi
0
<4 or 99 <-107 dBm or unknown
1
<10
<-93dBm
2
<16
<-71 dBm
3
<22
<-69dBm
4
<28
<-57dBm
5
>=28
>=-57 dBm
<ber>
0...7
Refer to the value of RXQUAL in the table of GSM
05.08 8.2.4.
99
Unknown or not detectable
Example
AT+CSQ
+CSQ: 24,99
OK
Query the current RSSI.
