ESP8266 Community Forum

- Sat Aug 20, 2016 1:01 pm #53410

be prepared to replace
a) the elctrodes regularily because off corrosion
b) the pot plant occasionally because of corrosion residue

I am aware of this, so I only powerup the sensor for 50ms every 30 minutes, so this shouldn't be an issue.

- Sat Aug 20, 2016 1:13 pm #53413 Maybe I figured out a possible issue: my module is like this one: http://www.ebay.it/itm/ESP8266-Wireless ... SwboVXPD5z

which has an LDR sensor which can be read through the ADC. Even if I have my sensor connected to the ADC, I see that obscuring or adding light to the sensor changes the reading. I have yet to figure out how to exclude the LDR sensor (if possible) and read just the soil moisture sensor. Otherwise, I will solder a board from scratch.

As for now, when the soil moisture sensor is totally wet, changing the light does not change the reading (always 0, as I want). However, when the sensor is dry, I get around 0.2V when the sensor is under a light, and 0.5V when obscured (which is fine for my purpose).

I am also considering to just remove the LDR sensor