ESP32 with Soil Moisture Sensor and LCD using MicroPython

Monitor Soil Moisture with ESP32 board and Soil Moisture Sensor Module with MicroPython. Show Status on LCD Display.

MicroPython Code – ESP32 with Soil Moisture Sensor and LCD Display

from machine import Pin, SoftI2C
from machine import Pin, ADC
from i2c_lcd import I2cLcd
import time

# LCD
i2c = SoftI2C(scl=Pin(22), sda=Pin(21),freq=100000)
lcd = I2cLcd(i2c, 0x27,2,16)
time.sleep(1)
lcd.clear()

# Soil Moisture
soil = ADC(Pin(35))
m = 100

min_moisture=0
max_moisture=4095

soil.atten(ADC.ATTN_11DB)       #Full range: 3.3v
soil.width(ADC.WIDTH_12BIT)     #range 0 to 4095

# START
text = 'Starting...'
lcd.putstr(text)

while True:
    try:
        soil.read()
        time.sleep(2)
        m = (max_moisture-soil.read())*100/(max_moisture-min_moisture)
        moisture = '{:.1f} %'.format(m)
        print('Soil Moisture:', moisture)
        lcd.clear()
        lcd.putstr('Soil Moisture: ')
        lcd.move_to(0,1)
        lcd.putstr(moisture)
        time.sleep(5)
    except:
        pass