LoRaWAN Demonstrator (Provider) - User guide version V1.2
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ANNEX 1: RSSI and SNR
The uplink frame contains information about the RSSI and the SNR.
x
The RSSI value is the actual absolute value in dB. It is in fact a negative number, as the RSSI will saturate above -
20dBm.
For example: if the value is 100, this means that the RSSI is -100 dBm
x
The SNR value is a signed value in tw
o’s complement, ranging from
-128 to +127
Values from 0 to 127 are positive values: 0=0; 1=1; 2=2…
For example: if the value is 10, the SNR is +10dB
Values from 255 to 128 are negative values: 255=-1; 254=-2; 253=-
3…
For example: if the value is 251, the SNR is -5dB