Found that issue when trying to receive a 125kHz, SF 12 LoRa signal, which did not work.
For low data rates (symbol length > 16ms), the LowDataRateOptimize bit should be set according to the Semtech SX1276/77/78/79 Datasheet. Transmitter and receiver must have the same setting.
I noticed a huge improvement using this feature.
Found that issue when trying to receive a 125kHz, SF 12 LoRa signal, which did not work. For low data rates (symbol length > 16ms), the LowDataRateOptimize bit should be set according to the Semtech SX1276/77/78/79 Datasheet. Transmitter and receiver must have the same setting. I noticed a huge improvement using this feature.