Problem
Device send a join request but it is never accepted or randomly fails.
Solution
Two reasons:
- Downlink issue
- Overused App nonce. Those are unique identifiers used during the join request and if the the device perform join request too often, it will eventually run out. If your device join the network with a high frequency, you need to review your device join policy as it is not LoRaWAN compliant. For example should the device be in deep sleep during between each message it can do the join request once and store the network keys ("mac save" for RN2438 module).
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