Quectel BC95 User Manual

NB-IoT Module Series
BC95 AT Commands Manual
BC95_AT_Commands_Manual Confidential / Released 20 / 58
3.8. AT+CSQ Get Signal Strength Indicator
The terminal will provide a current signal strength indicator of 0 to 255 where larger is generally better.
This information is based on a single measurement so can be expected to change greatly over short
periods of time and may never use all possible (or even the majority) of the entire possible range or
codes.
Execution command returns received signal strength indication <rssi> and channel bit error rate <ber>
from the MT. Refer to Chapter 6 for possible <err> values.
Test command returns values supported as compound values.
Parameter
Example
AT+CSQ
+CSQ:31,99
OK
AT+CSQ Get Signal Strength Indicator
Execute Command
AT+CSQ
Response
+CSQ: <rssi>,<ber>
OK
+CME ERROR: <err>
Test Command
AT+CSQ=?
Response
+CSQ: (list of supported <rssi>s),(list of supported <ber>s)
OK
<rssi> Integer type
0 -113dBm or less
1 -111dBm
2...30 -109... -53dBm
31 -51dBm or greater
99 Not known or not detectable
<ber> Integer type; channel bit error rate (in percent)
0...7 As RXQUAL values (refer to 3GPP specification)
99 Not known or not detectable
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Quectel BC95 Specifications

General

Brand	Quectel
Model	BC95
Category	Control Unit
Language	English