![]() Our sensors range (resolution) is double which allows more sensitivity and accuracy over time, we also found out that some sensors output voltage higher than 3.3V which could cause damage to Arduino, ESP, or Raspberry Pi device if not treated properly, our design includes a voltage regulator in order to make sure that the voltage is stable and doesn't exceed 3.3V. for comparing, we bought original sensors (yes, we spent 6$ on each soil moisture sensor) for the generic sensor, we bought multiple as many Chinese companies produce those and it has no brand. The tests have been done using the original Arduino Uno and FLUKE multimeter. The final stage of development was a comparison, so let's check the charts below:ĭuring our comparison, we didn't think about comparing to resistive sensors as those could be impacted by corrosion pretty quickly so we choose the capacitive sensors instead. We found out long sensor to be more accurate than the short sensor due to its wide surface but long sensors don't necessarily fit all the plant pots so we've decided to go on both. we feel we spent 3 months on it as well as we need to manually produce it instead of purchasing Chinese-made sensors in bulk but as you guys probably figured out - quality is everything for us. Now, it's important to say, we wish we wouldn't come on our own. ![]() STEMinds soil moisture sensors, long and short. soil moisture sensors! We purchased over *10* soil moisture sensors from different brands and even generic ones (1.2 or 2.0 soil moisture sensors) and tested them for quite some time, till we came up with our own. Little we knew our biggest challenge is going to be. In this post we would like to do some comparison and introduce soil moisture sensors, we've been working on a smart plant watering project for quite some time and we had one goal: to make it high quality and suitable for long-term usage.
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