Line Follower V2

I have created a new line following programm. This time I have included a light sensor calibration function and the option to adjust the power settings by pressing the left / right buttons.

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First steps with ESP-09

When I received my ESP-09 I had to learn that – in opposite to boards like NodeMCU and WeMos D1 mini – is it much more complicated to get it running. With it´s size of about 1 cm by 1 cm it is really tiny. Since there are no pins attached you have to…