利用esp8266做气象站
2023-04-18 15:35:10 时间
所需库
- ArduinoJson.h
- OLED.h 若提示没有ESP8266WiFi.h库,请选择你的开发版即可。
库下载:
Arduinojson.h
Oled库
将库下载后放到Arduino
的libraries
目录下
代码
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <Wire.h>
#include "OLED.h"
static const char logo[] PROGMEM={
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,
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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,
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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,
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 = "PDCN"; // XXXXXX -- 使用时请修改为当前你的 wifi ssid
const char* password = "1234567890"; // 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[] = "
";
/**
* @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.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 JACK",2,3);
display.print("bbskali.cn",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
" +
"Host: " + host + "
" +
"Connection: close
");
Serial.println("create a request:");
Serial.println(String("GET ") + GetUrl + " HTTP/1.1
" +
"Host: " + host + "
" +
"Connection: close
");
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<BUFFER_SIZE> 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("
");
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
}
设置WiFi信息和城市信息
const char* ssid = "PDCN"; // XXXXXX -- 使用时请修改为当前你的 wifi ssid
const char* password = "1234567890"; // 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
测试编译
正常情况下不会报错,编译上传即可!
效果如下
版权属于:逍遥子大表哥
本文链接:https://blog.bbskali.cn/1241.html
按照知识共享署名-非商业性使用 4.0 国际协议进行许可,转载引用文章应遵循相同协议。
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