The extremely good plant sensor named LILYGO TTGO-T-HIGrow, is here integrated into Home Assistant, via MQTT messages, that can be Autodiscovered, via the belonging Python program. The program supports both DHT sensors, the new BME280 sensor and the external soil temperature sensor.
I noticed it before, readings of soil humidity increases in correlation with lowering battery level:
now made "laboratory test", with lilygrow in glass, first there was evaporating, I fixed it, put more water and covered glass
Then you can see twice, "voltage lower than 3,6V" => humidity rises.
Can it be software compensated? It is the question.
Does it have the same effect for different humidity levels?
More testing necessary.
And there comes another thing, reading depends of physical water level, I start to thinking that visible round connectors are for salt (it measure like resistance, but other way, in the air reading is 0, when I connected them with wire reading was like 3000), and the water level measurement is coming from painted surfaces, so calibration probably should take it into account and during water level calibration.
I made a test, the the water is always wet, but readings are changing during Liligo immersing into water, (and it not dry fast)
So I think the calibration description should be more specific about how to put it in water, and warn that first completely dry device should be checked, before going into water, or long drying will be necessary.
I noticed it before, readings of soil humidity increases in correlation with lowering battery level:
now made "laboratory test", with lilygrow in glass, first there was evaporating, I fixed it, put more water and covered glass
Then you can see twice, "voltage lower than 3,6V" => humidity rises.
Can it be software compensated? It is the question. Does it have the same effect for different humidity levels? More testing necessary.
And there comes another thing, reading depends of physical water level, I start to thinking that visible round connectors are for salt (it measure like resistance, but other way, in the air reading is 0, when I connected them with wire reading was like 3000), and the water level measurement is coming from painted surfaces, so calibration probably should take it into account and during water level calibration.
I made a test, the the water is always wet, but readings are changing during Liligo immersing into water, (and it not dry fast)
So I think the calibration description should be more specific about how to put it in water, and warn that first completely dry device should be checked, before going into water, or long drying will be necessary.