MIC mismatch error

End Devices (Nodes)
1

Hi everyone,

I’m trying to OTAA connect using ISP4520 LoRa module.

I use ISP4520-example on GitHub.
Project file: ISP4520-examples/src/apps/lorawan/class_A/ses/class-A.emProject

The edited se-identity.h is as attached.
se-identity.txt (26.2 KB)

The Things Network V3 Settings:
Asia 920-923 MHz with LBT
LoRaWAN Specification 1.0.2
RP001 Regional Parameters 1.0.2 revision B
Activation mode: OTAA
Additional LoRaWAN class capabilities: None(Class A only)
Network defaults: Use network’s default MAC settings
DevEUI: 70 B3 D5 7E D0 04 F6 EF (generated by TTN)
AppEUI: 00 00 00 00 00 00 00 00 (generated by TTN)
AppKey: CA 95 FF C9 3C 4E C0 44 E0 FF EE D9 4F 7D D3 48 (generated by TTN)

ttn_v3_app_console

Live data shows MIC mismatch. Am I in the wrong place to edit the parameters?
How can I resolve this error?

Kiyoshi

2

Check se-identity file again, specifically the ‘translation’ table at the top and you’ll see you’ve changed the wrong key value. You need the one below the one you changed (which is also mentioned in the comment above that key).
Yes, it is confusing with those closely resembling names and differences between 1.0.x and 1.1

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