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I am setting up a rpi weather station with several rpi 0's (one for each sensor) and a main rpi 2 (for the data collection and storage). Does anyone have any ideas on how I can go about damp proofing my pi's? I live in the UK so it's quite rainy most of the time. They are under a roof.

Thanks in advance.

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The best solution is 3M's Novec 1700 electronic coating... but it may not be available in the UK, in a form and quantity suitable for hobbyist usage. Failing that, a more conventional conformal coating will improve things some, and make your boards more resistant to the effects of moisture - here's one available from a UK distributor, or a somewhat better, although more expensive product.

If you're keen on doing a bit of reading and research on some details of conformal coating, this Wikipedia article is a fair place to begin.

  • Thanks! I'll take a look at the links you have provided. – user10208400 Oct 19 '18 at 19:49
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Depending on how permanent you want to make your set up this might work: Circuit protected by a brick of clear resin

Encasing everything in clear resin will keep the damp out, your sensors will probably need to be exposed or very near the surface?

  • They will need to be near the surface for things like the temperature and humidity sensor. However I will need to have some wires going outside for the wind speed and direction sensors. – user10208400 Oct 19 '18 at 15:02
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Small Waterproof ”Tough Box" Dry Box for First Aid Kits, Survival Kits and valuables https://www.amazon.com/dp/B074L1Y897/ref=cm_sw_r_cp_apa_f8LYBb67EB6VR

I use these with some cable glands. I've had one outside for over a year. Rain, snow, sun. Still working.

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