Your answer sent me in the right direction. It was a little more complicated than you wrote, but the Arduino page gave sufficient extra help and now everything is working properly. I think that the way you're working, building and selling boards, publishing software for it, helping people to get thi...

I hope this is the way to implement a picture. If not, it only shows 'No Signal' nothing else.
The lamda sonde doesn't warm up and the green leds on the shield don't light.

I have a genuine Uno wifi rev2 with a Lambda-shield-2. No problems with two of your examples ...-2-Gui-Example and ...-2-Example (with SD), they're running fine. But ...the third, ..-2-Smartphone-Example doesn't function. The heating doesn't start.
What can be the problem?