树莓派学习笔记——获取树莓派CPU温度

#include <stdio.h>
#include <stdlib.h> 

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define TEMP_PATH "/sys/class/thermal/thermal_zone0/temp"
#define MAX_SIZE 32
int main(void) 
{
    int fd;
    double temp = 0;
    char buf[MAX_SIZE];
    
    // 打开/sys/class/thermal/thermal_zone0/temp
    fd = open(TEMP_PATH, O_RDONLY);
    if (fd < 0) {
        fprintf(stderr, "failed to open thermal_zone0/temp\n");
        return -1;
    }
    
    // 读取内容
    if (read(fd, buf, MAX_SIZE) < 0) {
        fprintf(stderr, "failed to read temp\n");
        return -1;
    }
    
    // 转换为浮点数打印
    temp = atoi(buf) / 1000.0;
    printf("temp: %.2f\n", temp);
    
    // 关闭文件
    close(fd);
}

!#/usr/bin/python
# -*- coding: utf-8 -*-
# 打开文件
file = open("/sys/class/thermal/thermal_zone0/temp")
# 读取结果，并转换为浮点数
temp = float(file.read()) / 1000
# 关闭文件
file.close()
# 向控制台打印
print "temp : %.1f" %temp

!#/usr/bin/python
# -*- coding: utf-8 -*- 
import requests 
import json 
# 打开文件 
file = open("/sys/class/thermal/thermal_zone0/temp") 
# 读取结果，并转换为浮点数 
temp = float(file.read()) / 1000 
# 关闭文件 
file.close() 
# 向控制台打印结果 
print "temp : %.1f" %temp 

# 设备URI 
apiurl = 'http://api.yeelink.net/v1.1/device/1949/sensor/2510/datapoints' 
# 用户密码, 指定上传编码为JSON格式 
apiheaders = {'U-ApiKey': 'ffa3826972d6cc7ba5b17e104ec5xxxx', 'content-type': 'application/json'} 
# 字典类型数据，在post过程中被json.dumps转换为JSON格式字符串 {"value": 48.123} 
payload = {'value': temp} 
#发送请求 
r = requests.post(apiurl, headers=apiheaders, data=json.dumps(payload)) 

# 打印返回码
print "response status: %d" %r.status_code

    APIKEY="U-ApiKey:ffa3826972d6cc7ba5b17e104ec5xxxx"
    APIURL="http://api.yeelink.net/v1.0/device/1949/sensor/2510/datapoints"
    curl --request GET --header $APIKEY $APIURL