The Txpower was +20dBm before and after (I and my colleague put the maximum), but since the reset we didn’t touch it, +11dBm.
Edit :
We tried Jason’s configuration and it works but we still have this question :
Why it was working with txf = 0 and txp = 20 ?
I just remember that I only touched transmitter power, or antenna gain.
I have an EU868 mDot, and now I have 8 channels, with the correct mask (00FF). I don’t touch any configuration since the reset.
I agree with you about the duty cycle regulation but before the problem I could send 20+ messages without a high delay … So I don’t understand what it happened.
Thanks,
Loïc