Is the frequency you use US915? RX2DR cannot be set to 0 on the US915 frequency. RX2DR is between DR8 and 13. Please read the description from LoRaWAN 1.0.3 Regional Parameters
Do you use us915? Rx2dr cannot be set to 0 on us915 frequency. Rx2dr is between DR8 and 13. Please read the instructions from lorawan 1.0.3 regional parameters<br>
Is the frequency you use US915? Rxdr cannot be set to 0 on US915 frequency. RX2DR is between DR8 and dr13. Please read the description from LoRaWAN 1.0.3 Regional Parameters.