class SoilMoistureSensor(BaseSensor):
def __init__(self):
BaseSensor.__init__(self)
self.sensor = None
self.soil_moisture_pin = 0
self.setup()
def setup(self):
try:
self.sensor = ADC()
self.init = True
except Exception as e:
print("SoilMoistureSensor.setup: " + str(e))
self.init = False
def read(self):
try: # connect Grove Capacitive Soil Moisture Sensor (4096-0) - Dry ~2504 Wet ~1543
if not self.init:
self.setup()
soil_moisture = self.sensor.read_raw(self.soil_moisture_pin)
soil_moisture = self.mapNum(soil_moisture, 2504, 1543, 0.00, 1.00)
soil_moisture = self.rolling_average(soil_moisture, self.measurements, 20)
except Exception as e:
print("SoilMoistureSensor.read: " + str(e))
soil_moisture = self.null_value
self.init = False
finally:
return soil_moisture
lcd = CharLCD('PCF8574', address=0x27, port=1, backlight_enabled=True)
adc = ADC()
Offset = -2.2
print("name: {0:20}, version: {1:4}".format(adc.name, adc.version))
try:
print('按下 Ctrl-C 可停止程式')
lcd.clear()
while True:
lcd.cursor_pos = (0, 0)
lcd.write_string("Date: {}".format(time.strftime("%Y/%m/%d")))
lcd.cursor_pos = (1, 0)
lcd.write_string("Time: {}".format(time.strftime("%H:%M:%S")))
#voltage = adc.read_voltage(0)/1000
raw = adc.read_raw(0)
voltage = adc.read_voltage(0)
percent = adc.read(0)
print("raw:{0:>6}, voltage:{1:>6}, percent(%):{2:>6} ".format(
raw, voltage, percent))
# phValue = 7.0 + (voltage - 3.2) * (-5.5)
# phValue= voltage*5.0/1024/6
# phValue=3.5*phValue+Offset
# print(voltage, phValue)
time.sleep(1)
except KeyboardInterrupt:
lcd.backlight_enabled = False
print('關閉程式')
finally:
lcd.clear()