I started a second take on the long term tests for the plant watering sensor. This tests are required to be sure, the measurements follow the expected cycles. After watering the sensor, the frequency should go down and while the soil is drying up, the frequency should go up the the initial value.

Logging this measurements is very important to get a good overview of the measurements and be sure if every aspect of the device works as expected. At this point, I especially test the sealing of the foot part of the sensor. If it keeps completely sealed against water, I should get very consistent and repeatable readings.

lucky-resistor-2

The curve on the right side shows the measurements of the last 48 hours. These small variations are normal and are most likely caused by the plant itself or because of temperature changes of the board.

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