類比實作Part4 – 電容式土壤溼度感測器(Capacitive Soil Moisture Sensor)

 

類比實作Part4 – 電容式土壤溼度感測器(Capacitive Soil Moisture Sensor)

 

感測器簡介

電阻式土壤溼度感測器由於電極裸露易被腐蝕，會縮短感測器的工作壽命。電容式土壤溼度感測器係採用電容感應原理來檢測土壤濕度。

Capacitive Soil Moisture Sensor V1.2 - 參考https://www.taiwansensor.com.tw/product/analog-capacitive-soil-moisture-sensor-電容式土壤濕度感測器-不易腐蝕-寬電壓/

 

Capacitive Soil Moisture Sensor V1.2 - 參考https://www.taiwansensor.com.tw/product/analog-capacitive-soil-moisture-sensor-電容式土壤濕度感測器-不易腐蝕-寬電壓/

 

電路圖

 

 

程式列表

"""  ePy_CapMoisture.py    EPY       Sensor  -----------------  ADC(0)    VOUT  3V3       +VS  GND       GND """   from machine import ADC from machine import PIN from machine import KEY  #獲取按鍵KEY庫 import utime   AirValue = 235 WaterValue = 225 intervals = (AirValue - WaterValue)/3   # Start Function if __name__ == '__main__':   sensor = ADC(0)     #創建ADC物件   key_c = KEY(KEY.KEYC)    #創建按鍵C   soilMoistureValue = 0     while True:     soilMoistureValue = sensor.read() #讀取ADC數據     print("Moisture Sensor Value:",soilMoistureValue)        #打印ADC值       if 0 <= soilMoistureValue and soilMoistureValue < WaterValue:       print("Moisture Dry")     elif WaterValue <= soilMoistureValue and soilMoistureValue < AirValue:       print("Moisture Moist")     else:       print("Moisture Wet")       utime.sleep_ms(400)     if key_c.value() == 0:      #如果按鍵C被按下，離開程式       break     sensor.deinit()   key_c.deinit()

 

執行結果

 

 

參考文獻

l   Capacitive Soil Moisture Sensor Calibration with Arduino https://makersportal.com/blog/2020/5/26/capacitive-soil-moisture-calibration-with-arduino

l   Capacitive_Soil_Moisture_Sensor_SKU_SEN0193-DFRobot https://wiki.dfrobot.com/Capacitive_Soil_Moisture_Sensor_SKU_SEN0193