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  • Hi Nick, are you typing this into the left hand side or right hand side of the IDE? Most modules aren't built into the firmware, the IDE loads it onto the board when you upload code from the right hand side. You could try typing the same code into the right hand side, or type

    require("DS18B20") 
    
    

    into the right hand side and click upload, which will load the module, then type your code into the left hand side.

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