Introducing OpenPlotter hats!!!

[Sailoog]

Hello,
I don't know the reason. I used another pi.
It's both PI3. I had another one I use for my home automation. I just switched them. My house works with the other PI. I've tried several times.
I can't tell you what's going on.
You can see the difference when booting. With the "defective" pi, the two green LEDs on the HAT light up immediately. With the pi on which the system works, it takes a while for them to light up. It's all a little weird.
Greetings Jürgen

If the green leds are on only for a moment at the beginning and then off means that the raspberry has been detected by the hat.

If the green leds keep flashing all the time means that the hat has not detected a raspberry and is working in standalone mode and getting data.