One Wire Temperature sensor with Microbit

Hello,

i try to use le One Wire Temperature sensor (https://wiki.seeedstudio.com/One-Wire-Temperature-Sensor-DS18B20/) with microbit.

it’s not naturally functional but I think mesuring analog value and find equation to transform it into temperature.

But no variation of any value.

Do you have some ideas ?

ps : sorry about my english, i’m french