如何用ESP8266做一个天气预报

1、硬件

用一个四博智联提供的nodemcu。一个OLED屏，一个USB线，4根杜邦线，可以上网的路由器，电脑。

3V3---VCC

GND---GND

GPIO4(D2)---SDA

GPIO5(D1)---SCL

2、设置路由器

把路由器账号设置为把路由器账号设置为

账号：xh003

密码：zxd+19901120=

3、烧录程序

打开ESP_TOOLS下载工具，选择8266.

工具下载：http://bbs.doit.am/forum.php?mod ... 6&highlight=TOO

点击START.等待烧录完成。

烧录完成后复位一下nodemcu。等待10s左右。

测试结果如下：

Arduino代码如下：

#include

#include "OLED.h"

static const char logo[] PROGMEM={

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xff,0x7f,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xff,0x03,0x00,0xf0,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x7f,0x00,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0x00,0xfe,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x03,0x00,0x00,0x00,0xf8,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xe0,0xff,0x03,0x00,0xe0,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x1f,0x1c,0xf0,0x1f,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x0f,0x00,0x80,0x7f,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0xff,0x01,0x00,0xfc,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x07,0x00,0x00,0xfe,0x03,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x03,0x00,0x00,0xfc,0x07,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x01,0x00,0x00,0xf8,0x0f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x3f,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x1f,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x0f,0x00,0x00,0x00,0xf0,0x3f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x07,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x07,0x00,0x00,0x00,0xf0,0x0f,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x03,0x00,0x00,0x00,0xf8,0x03,0x00,0xfc,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x01,0x00,0x00,0x00,0xfc,0x00,0x00,0x7e,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x01,0x00,0x00,0x00,0x7f,0x00,0x00,0x7f,0xf8,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x00,0x00,0x00,0x80,0x1f,0x00,0x80,0x7f,0xf8,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x00,0x00,0x00,0xe0,0x07,0x00,0xc0,0x3f,0xf0,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x00,0x00,0x00,0xf8,0x01,0x00,0xe0,0x3f,0xf0,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x00,0x00,0x7f,0x00,0x00,0xf8,0x3f,0xf0,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x00,0xe0,0x1f,0x00,0x00,0xfe,0x0f,0xf0,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x00,0xf8,0x03,0x00,0x80,0xff,0x0f,0xf8,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x00,0x7e,0x00,0x00,0xe0,0xff,0x01,0xf0,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x00,0x1f,0x00,0x00,0xf8,0xff,0x00,0xf8,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0xc0,0x0f,0x00,0x00,0xfe,0x7f,0x00,0xfc,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0xe0,0x03,0x00,0x80,0xff,0x1f,0x00,0xfe,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0xf8,0x01,0x00,0xe0,0xff,0x07,0x00,0xfe,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x7c,0x00,0x00,0xfc,0xff,0x00,0x00,0xfc,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x3e,0x00,0x00,0xff,0x07,0x00,0x00,0xfc,0xff,0xff,0xff,0x7f,

0xff,0xff,0x7f,0x00,0x0f,0x00,0xc0,0xff,0x07,0x00,0x00,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x80,0x07,0x00,0xf0,0xff,0xff,0x0f,0xc0,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xc0,0x03,0x00,0xf8,0xff,0xff,0x3f,0xf8,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xc0,0x01,0x00,0xfe,0xf8,0xc7,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xe1,0x01,0x00,0x7f,0xc0,0x03,0x87,0x00,0xfe,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xe1,0x00,0xc0,0x7f,0x80,0x01,0x86,0x00,0xfe,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x63,0x00,0xe0,0x7f,0x80,0x01,0x86,0x00,0xfe,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x63,0x00,0xe0,0x7f,0x8c,0x31,0x86,0xc3,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x67,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x6f,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0x7f,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x00,0x80,0x7f,0x80,0x01,0x86,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x01,0x00,0x7f,0x80,0x01,0x86,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x03,0x00,0x7c,0xc0,0x03,0x87,0x83,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x07,0x00,0xf8,0xff,0xff,0xf1,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x0f,0x00,0xe0,0xff,0x7f,0xf0,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x3f,0x00,0x00,0xfe,0x07,0xfc,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0x7f,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x03,0x00,0x00,0xe0,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0x7f,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xff,0x3f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f

};

//GPIO4(SDA) GPIO5(SCL)

OLED display(4, 5);

const char* ssid = "xh003"; // XXXXXX -- 使用时请修改为当前你的 wifi ssid

const char* password = "zxd+19901120="; // XXXXXX -- 使用时请修改为当前你的 wifi 密码

const char* host = "api.seniverse.com";

const char* APIKEY = "wcmquevztdy1jpca"; //API KEY

const char* city = "shenzhen";

const char* language = "en";//zh-Hans 简体中文会显示乱码

const unsigned long BAUD_RATE = 115200; // serial connection speed

const unsigned long HTTP_TIMEOUT = 5000; // max respone time from server

const size_t MAX_CONTENT_SIZE = 1000; // max size of the HTTP response

// 我们要从此网页中提取的数据的类型

struct UserData {

char city[16];//城市名称

char weather[32];//天气介绍（多云...）

char temp[16];//温度

char udate[32];//更新时间

};

WiFiClient client;

char response[MAX_CONTENT_SIZE];

char endOfHeaders[] = "\r\n\r\n";

/**

* @Desc 初始化操作

void setup() {

WiFi.mode(WIFI_STA); //设置esp8266 工作模式

Serial.begin(BAUD_RATE);

delay(10);

Serial.println();

Serial.print("Connecting to ");//写几句提示，哈哈

Serial.println(ssid);

WiFi.begin(ssid, password); //连接wifi

while (WiFi.status() != WL_CONNECTED) {

//这个函数是wifi连接状态，返回wifi链接状态

delay(100);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

delay(100);

Serial.println("IP address: ");

Serial.println(WiFi.localIP());//WiFi.localIP()返回8266获得的ip地址

client.setTimeout(HTTP_TIMEOUT);

}

/**

* @Desc 主函数

void loop() {

//初始化oled

display.begin();

//测试显示信息

display.print("Hello DOIT",2,3);

display.print("www.doit.am",4,3);

delay(2*1000);

display.clear();

while (!client.connected()){

if (!client.connect(host, 80)){

Serial.println("connection....");

delay(100);

}

if (sendRequest(host, city, APIKEY) && skipResponseHeaders()) {

clrEsp8266ResponseBuffer();

readReponseContent(response, sizeof(response));

UserData userData;

if (parseUserData(response, &userData)) {

printUserData(&userData);

}

delay(300);//每5s调用一次

}

/**

* @发送请求指令

bool sendRequest(const char* host, const char* cityid, const char* apiKey) {

// We now create a URI for the request

//心知天气

String GetUrl = "/v3/weather/now.json?key=";

GetUrl += apiKey;

GetUrl += "&location=";

GetUrl += city;

GetUrl += "&language=";

GetUrl += language;

// This will send the request to the server

client.print(String("GET ") + GetUrl + " HTTP/1.1\r\n" +

"Host: " + host + "\r\n" +

"Connection: close\r\n\r\n");

Serial.println("create a request:");

Serial.println(String("GET ") + GetUrl + " HTTP/1.1\r\n" +

"Host: " + host + "\r\n" +

"Connection: close\r\n");

delay(100);

return true;

}

/**

* @Desc 跳过 HTTP 头，使我们在响应正文的开头

bool skipResponseHeaders() {

// HTTP headers end with an empty line

bool ok = client.find(endOfHeaders);

if (!ok) {

Serial.println("No response or invalid response!");

}

return ok;

}

/**

* @Desc 从HTTP服务器响应中读取正文

void readReponseContent(char* content, size_t maxSize) {

size_t length = client.peekBytes(content, maxSize);

delay(100);

Serial.println("Get the data from Internet!");

content[length] = 0;

Serial.println(content);

Serial.println("Read data Over!");

client.flush();//这句代码需要加上不然会发现每隔一次client.find会失败

}

/**

* @Desc 解析数据

* 数据格式如下：

* {

* "results": [

* {

* "location": {

* "id": "WX4FBXXFKE4F",

* "name": "北京",

* "country": "CN",

* "path": "北京,北京,中国",

* "timezone": "Asia/Shanghai",

* "timezone_offset": "+08:00"

* },

* "now": {

* "text": "多云",

* "code": "4",

* "temperature": "23"

* },

* "last_update": "2017-09-13T09:51:00+08:00"

* }

bool parseUserData(char* content, struct UserData* userData) {

// -- 根据我们需要解析的数据来计算JSON缓冲区最佳大小

// 如果你使用StaticJsonBuffer时才需要

// const size_t BUFFER_SIZE = 1024;

// 在堆栈上分配一个临时内存池

// StaticJsonBuffer jsonBuffer;

// -- 如果堆栈的内存池太大，使用 DynamicJsonBuffer jsonBuffer 代替

DynamicJsonBuffer jsonBuffer;

JsonObject& root = jsonBuffer.parseObject(content);

if (!root.success()) {

Serial.println("JSON parsing failed!");

return false;

}

//复制我们感兴趣的字符串

strcpy(userData->city, root["results"][0]["location"]["name"]);

strcpy(userData->weather, root["results"][0]["now"]["text"]);

strcpy(userData->temp, root["results"][0]["now"]["temperature"]);

strcpy(userData->udate, root["results"][0]["last_update"]);

// -- 这不是强制复制，你可以使用指针，因为他们是指向“内容”缓冲区内，所以你需要确保

// 当你读取字符串时它仍在内存中

return true;

}

// 打印从JSON中提取的数据

void printUserData( struct UserData* userData) {

Serial.println("Print parsed data :");

display.print("City: ",0,0);

display.print(userData->city,0,6);

display.print("Weat: ",2,0);

display.print(userData->weather,2,6);

display.print("Temp: ",4,0);

display.print(userData->temp,4,6);

// display.print("Last Updata : ",7,2);

display.print(userData->udate,6,0);

// display.print("\r\n");

delay(4*1000);

}

// 关闭与HTTP服务器连接

void stopConnect() {

Serial.println("Disconnect");

client.stop();

}

void clrEsp8266ResponseBuffer(void){

memset(response, 0, MAX_CONTENT_SIZE); //清空

}

转载地址：http://bbs.doit.am/forum.php?mod=viewthread&tid=442&extra=

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