If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
The RSSI value read from the RSSI status register is a 2’s complement number. The following procedure can be used to convert the RSSI reading to an absolute power level (RSSI_dBm)
1) Read the RSSI status register
2) Convert the reading from a hexadecimal number to a decimal number (RSSI_dec)
3) If RSSI_dec ≥ 128 then RSSI_dBm = (RSSI_dec - 256)/2 – RSSI_offset Note: It takes some time from the radio enters RX mode until a valid RSSI value is present in the RSSI register. Please see DN505 [12] for details on how the RSSI response time can be estimated. CC1101 SWRS061I Page 45 of 98
4) Else if RSSI_dec < 128 then RSSI_dBm = (RSSI_dec)/2 – RSSI_offset
