Multiple "invalid MIC" withnode that connect ok after that

ChirpStack Network Server
1

Well … i have read all “invalid mic” info that i can find…

i have many error like that:

application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}
application/9/device/e8db848b783f8b3f/error {"applicationID":"9","applicationName":"APP1","deviceName":"e8db848b783f8b3f","devEUI":"e8db848b783f8b3f","type":"UPLINK_MIC","error":"invalid MIC"}

I have +200 nodes with 3 gateway

  • the node that you see (in error) did pass OTAA JOIN step.
  • somethime i have error before, sometime error after OTAA … sometime no error at all
  • sometime i have 3, 4 or more error (like example) with the same node really quick (at same time)

I dont know what to do next, to fix “invalid mic”.

  • rssi:-80
  • loRaSNR:10.300000190734863
  • channel:3