coding the line follower in the Elecfreaks 32 in 1 robotics kit
the kit
https://www.elecfreaks.com/micro-bit-wonder-building-kit-without-micro-bit-board.html
model building wiki
https://www.elecfreaks.com/learn-en/microbitKit/Wonder_Building_Kit/index.html
the included expansion board
https://www.elecfreaks.com/wukong-board-with-lego-holder-for-micro-bit.html
expansion board wiki
https://elecfreaks.com/learn-en/microbitExtensionModule/wukong.html
the line follower sensor
https://www.elecfreaks.com/octopus-2-channel-tracking-module.html