Hi All,
I tried to use ABP to send message to TTN and i got the payload, but since i try to use OTAA, i can’t join, at TTN console gateway i got message join accept but in node side, the log said EV_JOIN_FAILED. After check debug output at my node rfm95 i found odd output where the TX send data using x frequency but RX using y frequency as example log output below:
66429753: EV_JOIN_FAILED
66429758: engineUpdate, opmode=0xc
67349743: engineUpdate, opmode=0xc
67351971: TXMODE, freq=914300000, len=23, SF=10, BW=125, CR=4/5, IH=0
67671843: RXMODE_SINGLE, freq=925700000, SF=10, BW=500, CR=4/5, IH=0
67704521: RXMODE_SINGLE, freq=923300000, SF=12, BW=500, CR=4/5, IH=0
67835100: engineUpdate, opmode=0xc
67846746: engineUpdate, opmode=0xc
67848965: TXMODE, freq=909400000, len=23, SF=8, BW=500, CR=4/5, IH=0
68163918: RXMODE_SINGLE, freq=925700000, SF=7, BW=500, CR=4/5, IH=0
68168276: RXMODE_SINGLE, freq=923300000, SF=12, BW=500, CR=4/5, IH=0
68298866: EV_JOIN_FAILED
So i think that’s why node print EV_JOIN_FAILED didn’t accept message join approval from TTN due to difference frequency.
And added information, my gateway with the node pretty near, only 1-2 meters
Here a video record i took while troubleshoot this issue, https://youtu.be/XZjgEnLvwrc