Hi Alex,
I have been chasing this up with Quectel and they tell me this the correct
implementation.
"QCOPS and QENG command show the RSSI、RSRP and SINR value of the network, this
is in accordance with the 3GPP TS regulations, so it is normal for negative
numbers to be displayed.image"
So the image shows the value for <rsrp>
'0' if -140 dbm
...
'95' if dbm is -46 to -45
etc.
<rsrp> (what is actually sent over AT commands) is never negative. Isn't the
image supporting my earlier assertion: 'AT commands do not have a concept of
negative numbers'?
oFono exposes the <rsrp> value from 3GPP:
"byte ReferenceSignalReceivedPower [optional, lte]
Contains the Reference Signal Received Power. Valid range of values
is 0-97. Refer to <rsrp> in 27.007, Section 8.69 for more details.
"
Regards,
-Denis
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