The OTAA registration of the LoRa IO Controller Dragino LT-22222-L on the TTS V3 EU863 fails. The device sends multiple join requests but receives no response. The following error message (event) is generated for the end device:
“data”: {
“@type”: “type.googleapis.com/ttn.lorawan.v3.ErrorDetails”,
“namespace”: “pkg/joinserver”,
“name”: “mic_mismatch”,
“message_format”: “MIC mismatch”,
“correlation_id”: “eeebf41f92a5494d9c630850bfbc0e6f”,
“code”: 3
}
Since the error message is displayed on the TTS console on the end device, the DevEUI and AppEUI should be correct. The error also occurs with modified DevEUI and AppEUI. The AppKey was also compared with the device data.
The error also occurs with different firmware versions. Versions 1.4.2, 1.5.5, 1.5.6 were tested.
According to the manual, MAC V1.0.3 and Class C are set as LoRaWAN Network layer settings.
The device was not registered in TTN V2.
Solution: The error seems to be fixed by a changed TTN End device ID and a changed AppKey.