I was using Aruino + Lora Shield to communicate with LoRaGo Port + Rpi gateway. The loraserver is also installed on the same Rpi. Arduino is running lmic sample code for both ABP and OTAA. The frequency is US_915MHz with LMIC_selectSubBand(0). While ABP mode succeeds, OTAA shows EV_JOIN_FAILED. Although the latter did assign device address, network session key and application session key and Live Frame Logs showed uplink and downlink traffic, there was no event of EV_JOINED. MQTT message shows the following:
Anyone sees similar issue? BTW, how does OTAA to know which subband to use? Does it scan entire spectrum?