There could be a couple of vent holes on the top to circulate air, but not in an area where rain could get in. I could suspend it there, and I could put a 'cup' around it that would protect it against the worst of the rain, the sides would have holes around it, but no holes around the top where the sensor is, but below enough to circulate the air in the sensor area. There is a little overhang in the front of my house where the second story is, it is about 20 cm long. My plan is to use a protected area around my house. The crystal is the first thing that stops working. With an Ethernet Shield or Wifi Shield, you can upload it to The Arduino itself might stop working with freezing temperatures. You could even use three DHT22 / AM3202 sensors, and replace them if only one is working. Why not add a light sensor ? An Arduino is also capable to measure it's own voltage, so you can measure that. I think the DS18B20 is still more accurate. Thay way you can compare the temperatures. With a box made of a few porous bricks, you have good protection.Īs long as the bricks are in the air, protected from rain and not touching the wet ground. Is there a place that is always dry ? Under a tree of even in a shed ? Perhaps the humidity in a shed is not the same, but it gives some protection for the sensor. The DHT22 / AM3202 is better.įreezing condensated moisture will destroy the sensor for sure. The soil moisture sensor with SHT10 is not ment for freezing temperatures. The DS18B20 doesn't produce heat, so it will no influence the temperature. A sealed DS18B20 will give the same temperature as an metal encapsulated DS18B20 of Sparkfun.
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