树莓派python开发

饮啦冰美式2024-05-13 13:41

树莓派自带thonny

点亮LED灯

python 复制代码

import RPi.GPIO as GPIO
import time

# 设置GPIO模式为BCM
GPIO.setmode(GPIO.BCM)

# 设置LED引脚
led_pin = 18

# 设置LED引脚为输出
GPIO.setup(led_pin, GPIO.OUT)

# 点亮LED
GPIO.output(led_pin, GPIO.HIGH)

# 延时2秒
time.sleep(2)

# 关闭LED
GPIO.output(led_pin, GPIO.LOW)

# 清理GPIO设置
GPIO.cleanup()

python 复制代码

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)

try:
    while True:
        GPIO.output(11, True) # 将 GPIO11 引脚设置为高电平
        time.sleep(1)         # 持续一秒
        GPIO.output(11, False) # 将 GPIO11 引脚设置为低电平
        time.sleep(1)         # 持续一秒

except KeyboardInterrupt:
    GPIO.cleanup()          # 清除 GPIO 引脚并退出应用

示例：读取DHT22温湿度传感器数据

python 复制代码

import Adafruit_DHT

# 指定传感器型号和GPIO引脚
sensor = Adafruit_DHT.DHT22
pin = 4

# 读取温湿度数据
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)

if humidity is not None and temperature is not None:
    print(f"温度={temperature:0.1f}°C，湿度={humidity:0.1f}%")
else:
    print("读取传感器数据失败")

示例：控制舵机

python 复制代码

import RPi.GPIO as GPIO
import time


# 设置GPIO模式为BCM
GPIO.setmode(GPIO.BCM)

# 设置舵机引脚
servo_pin = 17

# 设置舵机引脚为输出
GPIO.setup(servo_pin, GPIO.OUT)

# 创建PWM对象
pwm = GPIO.PWM(servo_pin, 50)

# 将舵机转动到90度位置
pwm.start(7.5)
time.sleep(2)

# 将舵机转动到0度位置
pwm.ChangeDutyCycle(2.5)
time.sleep(2)

# 停止PWM
pwm.stop()

# 清理GPIO设置
GPIO.cleanup()