arduino-LoRa
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How to implement Low Data Rate Optimization (LDRO)
Low Data Rate Optimization (LDRO) is one of the key features of LoRa, and it is essential for SF11 and SF12. How to enable LDRO?
By setting bit 3 of RegModemConfig3 (0x26). See https://github.com/sandeepmistry/arduino-LoRa/blob/master/src/LoRa.cpp#L576-L587