does anyone have a sensor or idea how to measure the water filling level of a rain barrel in the garden?
Most of my sensors are from vendor “Homematic” and I’m also aware of sensor HM-Sen-Wa-Od. I saw that the minimum height of the barrel needs to be at least 1.1 meter for this sensor to work. Mine is only 80 centimeter in height. So this sensor seems to be not the right one for my use case.
Are there any other solutions or ideas how to implement a wireless solution? Any hardware tip? Maybe via ultrasonic sound or some other technology? It should work with batteries if possible and send the data wireless to my raspberry / openhab.
Thanks for all your creative suggestions!