Embedded Files
Hardware-aansluiting
Hardware-aansluiting
Stap 1 Sluit Grove - 16 * 2 LCD-scherm aan op I2C-poort, Grove - Moisture Sensor op A0-poort en Grove - Buzzer op PWM-poort van Grove Base Hat.
Stap 2 Plaats de Base Hat in de Raspberry Pi.
Stap 3 Gebruik micro-USB om Raspberry Pi met pc te verbinden.
Software programmeren
Software programmeren
Stap 1: voer de volgende opdrachten uit om een python-bestand te maken
cd grove.py
nano lesson_8.py
#!/usr/bin/env python
import time
from mraa import getGpioLookup
from upm import pyupm_buzzer as upmBuzzer
from grove.grove_moisture_sensor import GroveMoistureSensor
from grove.lcd.sh1107g import JHD1802
def main():
# Grove - 16x2 LCD(White on Blue) connected to I2C port
lcd = JHD1802()
# Grove - Moisture Sensor connected to port A0
sensor = GroveMoistureSensor(0)
# Grove - Buzzer connected to port PWM
buzzer = upmBuzzer.Buzzer(getGpioLookup('GPIO12'))
while True:
mois = sensor.moisture
if 0 <= mois and mois < 300:
level = 'dry'
elif 300 <= mois and mois < 600:
level = 'moist'
else:
level = 'wet'
buzzer.playSound(upmBuzzer.BUZZER_DO, 200000)
print('moisture: {}, {}'.format(mois, level))
lcd.setCursor(0, 0)
lcd.write('moisture: {0:>6}'.format(mois))
lcd.setCursor(1, 0)
lcd.write('{0:>16}'.format(level))
time.sleep(1)
if __name__ == '__main__':
main()
t programma uit
sudo chmod +x lesson_8.py
sudo ./lesson_8.py
. Zoemer wordt gebruikt om mensen te waarschuwen zodra het vochtniveau "nat" wordt.
pi@raspberrypi:~/grove.py $ sudo ./lesson_8.py
moisture: 0, dry
moisture: 0, dry
moisture: 396, moist
moisture: 398, moist
moisture: 407, wet
moisture: 418, wet
^CTraceback (most recent call last):
File "./lesson_8.py", line 41, in <module>
main()
File "./lesson_8.py", line 38, in main
time.sleep(1)
KeyboardInterrupt
pi@raspberrypi:~/grove.py $
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