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Soil moisture sensor project
OpenSprinkler already has an input to connect external sensors. In principle it works like this: If watering is pending, it is checked whether the sensor allows it, then watering starts; if not, then not. So the whole thing is a yes/no game (digital). There are a variety of solutions on the market, but none of them seem optimal to me.
By the way, OpenSprinkler 3.0/3.2 has a 5V DC output - labeled “VIN” for the power supply to the sensor.
I see the following points as important:
– Version as a capacitive sensor: Important for protection against corrosion
– Longevity: Maintenance-free and stable
– 24V AC or 5V DC supply
What is your solution?
Edit: My solution is presented here: Soil moisture sensor
Hello,
Unfortunately, the information from OpenSprinkler is pretty much advice. As a customer, I would like product examples to be included here.
Can I use this sensor:
https://dvs-beregnung.de/kapazitiver-bodenFeuchte-sensor-inkl-temperaturmessen-Truebner-smt50-arduino?c urr=EUR&gclid=Cj0KCQjwla7nBRDxARIsADll0kBxU0v3c10ZYIKotw9t3hrwRU0cJtnXKCFd–SvQ4hUL5xGlAzj8noaAvNaEALw_wcB
Or maybe you have another one. Suggestion where compatibility is guaranteed?
Yes, almost! I have already had experience with exactly this soil moisture sensor. However, you still need an A/D converter for OpenSprinkler. Details coming soon!
Cool. Can you possibly recommend an A/D converter?
Take a look in the shop...
I'm now starting to design my garden and was actually planning on getting the greenIQ. Well, that doesn't exist anymore. Now I have to reschedule my garden watering a bit.
The OpenSprinkler is already an alternative to greenIQ.
I'm also now looking for a robust soil moisture sensor.
I came across a model that was affordable and didn't disappear after a year.
Possibly a solution for the project.
https://www.reichelt.de/bodenfeuchtigkeitssensor-12-v-dc-m-173-p108537.html?PROVID=2788&gclid=EAIaIQobChMI2NfX-syq4gIVEUTTCh3D0wsGEAYYAyABEGKBfPD_BwE&&r=1
I'm also curious to see how the soil moisture sensor project develops for you.
Hello Wilhelm,
Unfortunately it is not a capacitive sensor. Yours works by sending electricity through the ground between the two metal pins. This causes corrosion on the pins and poisons collect in the soil. Yes, it will work, especially in the beginning. The corrosion is slow and after 3-4 years the sensor only reports nonsense.
A capacitive sensor is better.