I want to obtain the CQI parameter (channel quality indication) from my Quectel EC25. I reviewed the AT commands but I have no clue of how I could obtain this value.
Asked
Active
Viewed 389 times
1 Answers
2
I reviewed the guide as well, and I confirm that the CQI itself is not returned by any command. Anyway, the command closer to what you are looking is probably +CQT.
From EC25 AT commands guide the command, which is a standar ETSII command so you'll find it in pretty every cellular modem, is:
The command indicates the received signal strength
<rssi>and the channel bit error rate<ber>. By issuing execution command
AT+CSQ
the following response is received
+CSQ: <rssi>,<ber>
OK
in which <rssi> contains the received signal strength
indication mapped in the following way:
<rssi> |
Signal level |
|---|---|
| 0 | -113dBm or less |
| 1 | -111dBm |
| 2...30 | -109dBm... -53dBm |
| 31 | -51dBm or greater |
| 99 | Not known or not detectable |
| 100 | -116dBm or less |
| 101 | -115dBm |
| 102...190 | -114dBm...-26dBm |
| 191 | -25dBm or greater |
| 199 | Not known or not detectable |
Roberto Caboni
- 7,252
- 10
- 25
- 39