Hello,

I am a newbie to M5stack and want to use the Earth sensor to display moisture values. I followed the instructions as outlined in this video by exactly rebuilding the respective code: https://www.youtube.com/watch?v=rYi8XLe3X_c

The device now does show data, but it is constantly above 1000 even when just laying on my desk without any contact to water (up to the maximum of 1024 which, as far as I understand, indicates that the sensor detects water (fully wet)). When I put the senor into water, the readings do not change they stay above 1000.

Any idea what I did wrong?

It wont work as the RED Port is PortA I2C, you need to connect it to a Black Port B or use a PBhub to convert to I2C

And just for the sake of completeness: The sensor is on Port B.

is example which you can load from Earth unit section works?

@rudi15 said in Earth sensor:

@ajb2k3 Sure, thanks. Here is the code:

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
earth_0 = unit.get(unit.EARTH, unit.PORTB)

MoistureAnalog = M5TextBox(14, 59, "Analog", lcd.FONT_Ubuntu, 0xFFFFFF, rotate=0)

while True:
MoistureAnalog.setText(str((str('Earth Sensor Analog: ') + str((earth_0.analogValue)))))
wait_ms(500)
wait_ms(2)

Is your earth unit initialized? I cant see any reference to port B gpio

Judging by the colour blocks he’s using UIFlow 1 not UIFlow2

@ajb2k3 Sure, thanks. Here is the code:

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
earth_0 = unit.get(unit.EARTH, unit.PORTB)

MoistureAnalog = M5TextBox(14, 59, "Analog", lcd.FONT_Ubuntu, 0xFFFFFF, rotate=0)

while True:
MoistureAnalog.setText(str((str('Earth Sensor Analog: ') + str((earth_0.analogValue)))))
wait_ms(500)
wait_ms(2)

Is your earth unit initialized? I cant see any reference to port B gpio

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
earth_0 = unit.get(unit.EARTH, unit.PORTB)

MoistureAnalog = M5TextBox(14, 59, "Analog", lcd.FONT_Ubuntu, 0xFFFFFF, rotate=0)

while True:
MoistureAnalog.setText(str((str('Earth Sensor Analog: ') + str((earth_0.analogValue)))))
wait_ms(500)
wait_ms(2)