如何用树莓派python语言调动dht11温湿度传感器收集数据在lcd1602上显示出来

Question

如何用树莓派python语言调动dht11温湿度传感器收集数据在lcd1602上显示出来

Answer 1

import RPi.GPIO as GPIO
import time
import Adafruit_DHT
from RPLCD.i2c import CharLCD

# 设置GPIO和DHT11传感器参数
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
DHT_SENSOR = Adafruit_DHT.DHT11
DHT_PIN = 4

# 初始化LCD1602显示屏
lcd = CharLCD(i2c_expander='PCF8574', address=0x27)

while True:
    # 从DHT11传感器中读取温湿度数据
    humidity, temperature = Adafruit_DHT.read_retry(DHT_SENSOR, DHT_PIN)

    # 如果读取成功，则在LCD1602显示屏上显示温湿度数据
    if humidity is not None and temperature is not None:
        lcd.clear()
        lcd.cursor_pos = (0, 0)
        lcd.write_string("Temp: {:.1f} C".format(temperature))
        lcd.cursor_pos = (1, 0)
        lcd.write_string("Humidity: {:.1f}%".format(humidity))
    else:
        lcd.clear()
        lcd.cursor_pos = (0, 0)
        lcd.write_string("Read error")
    
    # 等待一段时间后再次读取温湿度数据
    time.sleep(2)