Rainbow Electronics GM862-QUAD-PY - Manual (Page 19)

GM862-QUAD / PY Software User Guide
1vv0300747 Rev. 3 - 10/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 19 of 96
NOTE: this command issues a network request and it may require a quite long time to respond,
since the device has to wait the answer from the network (it can be as long as 60 seconds).
Hence don't use it if not needed
.
2.5.3.3 Check for received signal strength & quality
Once the mobile has registered on one network, it may be useful to know the received signal strength
& quality to give the user an indication of the reliability of the network.
•
send command AT+CSQ<cr>
•
wait for response in the format:
+CSQ: <rssi>,<ber>
OK
where:
<rssi> is an integer from 0 to 99 that indicates the received signal strength:
<rssi> value Signal strength Indication
0 -113 dBm or less Signal is VERY low: at the extreme sensibility limit
1 -111 dBm MMI may indicate only 1 antenna bar
2 -109 dBm MMI may indicate only 1 antenna bar
3 -107 dBm MMI may indicate only 1 antenna bar
4 -105 dBm MMI may indicate only 1 antenna bar
5 -103 dBm MMI may indicate only 1 antenna bar
6 -101 dBm MMI may indicate 2 antenna bars
7 -99 dBm MMI may indicate 2 antenna bars
8 -97 dBm MMI may indicate 2 antenna bars
9 -95 dBm MMI may indicate 2 antenna bars
10 -93 dBm MMI may indicate 3 antenna bars
11 -91 dBm MMI may indicate 3 antenna bars
12 -89 dBm MMI may indicate 3 antenna bars
13 -87 dBm MMI may indicate 3 antenna bars
14 -85 dBm MMI may indicate 3 antenna bars
15 -83 dBm MMI may indicate 4 antenna bars
16 -81 dBm MMI may indicate 4 antenna bars
17 -79 dBm MMI may indicate 4 antenna bars
18 -77 dBm MMI may indicate 4 antenna bars
19 -75 dBm MMI may indicate 4 antenna bars
20 -73 dBm MMI may indicate 4 antenna bars
21 -71 dBm MMI may indicate 4 antenna bars
22 -69 dBm MMI may indicate 4 antenna bars
23 -67 dBm MMI may indicate 4 antenna bars
24 -65 dBm MMI may indicate 4 antenna bars
25 -63 dBm MMI may indicate 4 antenna bars