User Manual

GM862-GPS Software User Guide

1vv0300729 Rev. 5 - 05/07/07

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>

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

26 -61 dBm MMI may indicate 4 antenna bars