Hi all,
I have some questions/clarifications re getting the signal level from
the modem.
I'm using a Huawei modem via USB.
In getSignalLevel (ModemGateway.java) we have:
response = getATHandler().getSignalLevel();
Following the trail in the code this leads to (ATHandler.java):
getModemDriver().write("AT+CSQ\r");
return (getModemDriver().getResponse());
which effectively does the job (for my modem anyway).
The string that we get back is something like "+CSQ: 14,99OK"
getSignalLevel in ModemGateway.java converts it to an int given by
(for the above case): 14 * 100 / 31 = 45 (%).
My questions are:
* What does the return string really mean (i.e. is it "signal is 14
out of 99)?
* Why do we multiply by 100/31 ?
* How do I get the signal strength in dBm, which is what I am really
after?
* In any case, what is the signal value that we get: before
demodulation, or after? If it is after, which standard was
demodulated.
Thanks!
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