执行下面的代码便可:
echo 'disable_camera_led=1' >> /boot/config.txt
执行下面的代码便可:
echo 'disable_camera_led=1' >> /boot/config.txt
树莓派现在已经出到4了,手上也有几个不同的版本,有时候要查看一下版本,新的raspbian支持直接查看了,执行命令为:
cat /proc/device-tree/model
输出结果如下(型号不同结果也有不同),如:
Raspberry Pi 2 Model B Rev 1.1
旧的系统版本则需要通过查看/proc/cpuinfo中的Revision的值来判断。
使用python读取dht22温湿度传感器的值。
import sys import Adafruit_DHT import requests import json url = 'https://www.3gcomet.com/iot/iot_receive.php' sensor = Adafruit_DHT.DHT22 pin = 4 humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) if humidity is not None and temperature is not None: temp = '{:.1f}'.format(temperature) humi = '{:.1f}'.format(humidity) payload = {"ac":'iotofict',"loc":'CloudDC',"tem":temp,"hum":humi} response = requests.post(url=url,data=payload) print(response.text) #print('Temp={0:0.1f}* Humidity={1:0.1f}%'.format(temperature, humidity)) else: print('Failed to get reading. Try again!') sys.exit(1)