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  • Will you need pull up resistors to get the DS18B20 working reliably with the pi?

    Also, why not do it wirelessly? You can get a decent WiFi Dev board for less than a fiver now days. I know that's another £50 down but surely worth it for no cables?

  • Yes, pull up resistors required.

    I've already got 4-core alarm cable running to most rooms.

    I also don't want a whole bunch of wifi devices to have to manage.

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