IP65 Capacitive Soil Moisture Sensor for ESP32
Karl.Exler 2026-02-18 19:39:10 86 Views1 Replies I am developing a solution which works far from any infrastructure in my garden. For powering this sensor I am using a LiPo and a solar panel. The board is a Firebeetle ESP32 C6 from DFRobot.
To save as much energy as possible I am using deep sleep mode and in addition I power off the sensor.. In opposite to my testing I see that the soil moisture values are… not so serious.. Therefore the question: how long before measuring I have to power on the sensor?
Second question: It seems that the 3,3 Volt from my battery is too less for the sensor? Could that be?
Third question: There are two black cables on this sensor.. Is it really obligatory to connect both black with ground?
Many thanks in advance
Karl, Vienna
1) I cannot see any warm-up time mentioned in the wiki page. Make sure that you followed the proper calibration process mentioned here:
https://wiki.dfrobot.com/Waterproof_Capacitive_Soil_Moisture_Sensor_SKU_SEN0308#target_3
2) The operating voltage is 3.3V-5V. So, 3.3V must not be a problem.
3)In the connection diagram and chart given here,
https://wiki.dfrobot.com/Waterproof_Capacitive_Soil_Moisture_Sensor_SKU_SEN0308#target_3
It shows that two blacks are connected to the GND.
love.forcircuits 