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从零开始使用ESP8266+OLED打造智能时钟（网络校时+实时天气+天气预报）
目录
零、前言
一、材料准备
1、ESP8266（NodeMCU V3）
2、OLED（SSD1306）（四针脚，利用I2C通信）
3、杜邦线（我使用4根母对母）
3、WiFi或者手机热点
温馨提示：不要打开WIFI6，不要打开5.0GHz频段温馨提示：不要打开WIFI6，不要打开5.0GHz频段温馨提示：不要打开WIFI6，不要打开5.0GHz频段
4.一台能上网的电脑
5、心知天气账号（免费版即可）（👉传送门）
二、开发环境配置
1、Arduino基础安装
（1）访问Arduino官网，下载Arduino IDE  (2)接入开发板，查看端口是否可选，如果端口是灰色的，请查看文末的Q&A
2、安装ESP8266所需要的库
（1）打开 文件->首选项 （2）在附加开发板管理器网址里添加以下内容
https://arduino.esp8266.com/stable/package_esp8266com_index.json
 （3）打开工具->开发板->开发板管理器，等待同步完成（由于网络原因，可能会失败，请多试几次） 
（4）搜索esp8266并安装（由于网络原因，可能会失败，请多试几次） 
3、安装所需要的库
展示需要引入的头文件（其实装了太多，我也忘记那些是必须的了
#include //JSON解析
#include //WIFI
#include
#include
#include
#include //时间
#include
#include
三、ESP8266与OLED连接
OLED 显示模块ESP8266开发板GNDGVCC3VSCLD1SDAD2
注意图中杜邦线颜色 
四、代码编写
//引入必要的头文件
#include
#include
#include
#include
#include
#include
#include
#include
WiFiUDP Udp;
unsigned int localPort = 8888; // 用于侦听UDP数据包的本地端口
//网络校时的相关配置
static const char ntpServerName[] = "ntp1.aliyun.com"; //NTP服务器，使用阿里云
int timeZone = 8; //时区设置，采用东8区
//保存断网前的最新数据
int results_0_now_temperature_int_old;
String results_0_now_text_str_old;
int results_0_daily_1_high_int_old;
int results_0_daily_1_low_int_old;
String results_0_daily_1_text_day_str_old;
//函数声明
time_t getNtpTime();
void sendNTPpacket(IPAddress &address);
void oledClockDisplay();
void sendCommand(int command, int value);
void initdisplay();
void connectWiFi();
void parseInfo_now(WiFiClient client,int i);
void parseInfo_fut(WiFiClient client,int i);
//
boolean isNTPConnected = false;
const unsigned char xing[] U8X8_PROGMEM = {
0x00, 0x00, 0xF8, 0x0F, 0x08, 0x08, 0xF8, 0x0F, 0x08, 0x08, 0xF8, 0x0F, 0x80, 0x00, 0x88, 0x00,
0xF8, 0x1F, 0x84, 0x00, 0x82, 0x00, 0xF8, 0x0F, 0x80, 0x00, 0x80, 0x00, 0xFE, 0x3F, 0x00, 0x00}; /*星*/
const unsigned char liu[] U8X8_PROGMEM = {
0x40, 0x00, 0x80, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0xFF, 0x7F, 0x00, 0x00, 0x00, 0x00,
0x20, 0x02, 0x20, 0x04, 0x10, 0x08, 0x10, 0x10, 0x08, 0x10, 0x04, 0x20, 0x02, 0x20, 0x00, 0x00}; /*六*/
typedef struct
{ //存储配置结构体
int tz; //时间戳
} config_type;
config_type config;
WiFiClient clientNULL;
DNSServer dnsServer;
ESP8266WebServer server(80);
//----------WIFI连接配置----------
const char* ssid = "XXX"; // 连接WiFi名（此处使用XXX为示例）
const char* password = "12345678"; // 连接WiFi密码（此处使用12345678为示例）
// 请将您需要连接的WiFi密码填入引号中
//----------天气API配置----------
const char* host = "api.seniverse.com"; // 将要连接的服务器地址
const int httpPort = 80; // 将要连接的服务器端口
// 心知天气HTTP请求所需信息
String reqUserKey = "XXXXXX"; // 私钥
String reqLocation = "hangzhou"; // 城市
String reqUnit = "c"; // 摄氏/华氏
//----------设置屏幕----------
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE);
int sta = 0;
//----------初始化OLED----------
void initdisplay()
{
u8g2.begin();
u8g2.enableUTF8Print();
}
//----------用于获取实时天气的函数(0)----------
void TandW(){
String reqRes = "/v3/weather/now.json?key=" + reqUserKey +
+ "&location=" + reqLocation +
"&language=en&unit=" +reqUnit;
// 向心知天气服务器服务器请求信息并对信息进行解析
httpRequest(reqRes,0);
//延迟，需要低于20次/分钟
delay(5000);
}
void display_1(int results_0_now_temperature_int,String results_0_now_text_str);//声明函数，用于显示温度、天气
//----------获取3天预报(1)----------
void threeday(){
// 建立心知天气API当前天气请求资源地址
String reqRes = "/v3/weather/daily.json?key=" + reqUserKey +
+ "&location=" + reqLocation + "&language=en&unit=" +
reqUnit + "&start=0&days=3";
// 向心知天气服务器服务器请求信息并对信息进行解析
httpRequest(reqRes,1);
delay(5000);
}
void clock_display(time_t prevDisplay){
server.handleClient();
dnsServer.processNextRequest();
if (timeStatus() != timeNotSet)
{
if (now() != prevDisplay)
{ //时间改变时更新显示
prevDisplay = now();
oledClockDisplay();
}
}
}
void setup(){
Serial.begin(9600);
Serial.println("");
initdisplay();
// 连接WiFi
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_unifont_t_chinese2);
u8g2.setCursor(0, 14);
u8g2.print("Waiting for WiFi");
u8g2.setCursor(0, 30);
u8g2.print("connection...");
u8g2.sendBuffer();
connectWiFi();
Udp.begin(localPort);
setSyncProvider(getNtpTime);
setSyncInterval(300); //每300秒同步一次时间
}
time_t prevDisplay = 0; //当时钟已经显示
void loop(){
if (sta>=0 && sta
TandW();
}else{
threeday();
}
++sta;
if(sta==253){
sta = 0;
}
}
// 向心知天气服务器服务器请求信息并对信息进行解析
void httpRequest(String reqRes,int stat){
WiFiClient client;
// 建立http请求信息
String httpRequest = String("GET ") + reqRes + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n";
Serial.println("");
Serial.print("Connecting to "); Serial.print(host);
// 尝试连接服务器
if (client.connect(host, 80)){
Serial.println(" Success!");
// 向服务器发送http请求信息
client.print(httpRequest);
Serial.println("Sending request: ");
Serial.println(httpRequest);
// 获取并显示服务器响应状态行
String status_response = client.readStringUntil('\n');
Serial.print("status_response: ");
Serial.println(status_response);
// 使用find跳过HTTP响应头
if (client.find("\r\n\r\n")) {
Serial.println("Found Header End. Start Parsing.");
}
if (stat == 0){
// 利用ArduinoJson库解析心知天气响应信息(实时数据)
parseInfo_now(client,1);
}else if(stat == 1){
parseInfo_fut(client,1);
}
}
else {
Serial.println(" connection failed!");
if (stat == 0){
// 利用ArduinoJson库解析心知天气响应信息(实时数据)
parseInfo_now(clientNULL,0);
}else if(stat == 1){
parseInfo_fut(clientNULL,0);
}
}
//断开客户端与服务器连接工作
client.stop();
}
// 连接WiFi
void connectWiFi(){
WiFi.begin(ssid, password); // 启动网络连接
Serial.print("Connecting to "); // 串口监视器输出网络连接信息
Serial.print(ssid); Serial.println(" ..."); // 告知用户NodeMCU正在尝试WiFi连接
int i = 0; // 这一段程序语句用于检查WiFi是否连接成功
while (WiFi.status() != WL_CONNECTED) { // WiFi.status()函数的返回值是由NodeMCU的WiFi连接状态所决定的。
delay(1000); // 如果WiFi连接成功则返回值为WL_CONNECTED
Serial.print(i++); Serial.print(' '); // 此处通过While循环让NodeMCU每隔一秒钟检查一次WiFi.status()函数返回值
} // 同时NodeMCU将通过串口监视器输出连接时长读秒。
// 这个读秒是通过变量i每隔一秒自加1来实现的。
Serial.println(""); // WiFi连接成功后
Serial.println("Connection established!"); // NodeMCU将通过串口监视器输出"连接成功"信息。
Serial.print("IP address: "); // 同时还将输出NodeMCU的IP地址。这一功能是通过调用
Serial.println(WiFi.localIP()); // WiFi.localIP()函数来实现的。该函数的返回值即NodeMCU的IP地址。
}
// 利用ArduinoJson库解析心知天气响应信息(实时)
void parseInfo_now(WiFiClient client,int i){
if(i==1){
const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(1) + 2*JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 230;
DynamicJsonDocument doc(capacity);
deserializeJson(doc, client);
JsonObject results_0 = doc["results"][0];
JsonObject results_0_now = results_0["now"];
const char* results_0_now_text = results_0_now["text"]; // "Sunny"
const char* results_0_now_code = results_0_now["code"]; // "0"
const char* results_0_now_temperature = results_0_now["temperature"]; // "32"
const char* results_0_last_update = results_0["last_update"]; // "2020-06-02T14:40:00+08:00"
// 通过串口监视器显示以上信息
String results_0_now_text_str = results_0_now["text"].as();
int results_0_now_code_int = results_0_now["code"].as();
int results_0_now_temperature_int = results_0_now["temperature"].as();
String results_0_last_update_str = results_0["last_update"].as();
Serial.println(F("======Weahter Now======="));
Serial.print(F("Weather Now: "));
Serial.print(results_0_now_text_str);
Serial.print(F(" "));
Serial.println(results_0_now_code_int);
Serial.print(F("Temperature: "));
Serial.println(results_0_now_temperature_int);
Serial.print(F("Last Update: "));
Serial.println(results_0_last_update_str);
Serial.println(F("========================"));
display_0(results_0_now_temperature_int,results_0_now_text_str);
results_0_now_text_str_old = results_0_now_text_str;
results_0_now_temperature_int_old = results_0_now_temperature_int;
}
else{
display_0(results_0_now_temperature_int_old,results_0_now_text_str_old);
}
}
//----------输出实时天气----------
void display_0(int results_0_now_temperature_int,String results_0_now_text_str){
//显示输出
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_wqy16_t_gb2312);
u8g2.setCursor(15, 14);
u8g2.print("杭州实时天气");
u8g2.setFont(u8g2_font_logisoso24_tr);
u8g2.setCursor(45, 44);
u8g2.print(results_0_now_temperature_int);
u8g2.setCursor(35, 61);
u8g2.setFont(u8g2_font_unifont_t_chinese2);
u8g2.print(results_0_now_text_str);
u8g2.sendBuffer();
}
// 利用ArduinoJson库解析心知天气响应信息(预测)
void parseInfo_fut(WiFiClient client,int i){
if(i==1){
const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(3) + JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 3*JSON_OBJECT_SIZE(14) + 860;
DynamicJsonDocument doc(capacity);
deserializeJson(doc, client);
JsonObject results_0 = doc["results"][0];
JsonArray results_0_daily = results_0["daily"];
JsonObject results_0_daily_0 = results_0_daily[0];
const char* results_0_daily_0_date = results_0_daily_0["date"];
const char* results_0_daily_0_text_day = results_0_daily_0["text_day"];
const char* results_0_daily_0_code_day = results_0_daily_0["code_day"];
const char* results_0_daily_0_text_night = results_0_daily_0["text_night"];
const char* results_0_daily_0_code_night = results_0_daily_0["code_night"];
const char* results_0_daily_0_high = results_0_daily_0["high"];
const char* results_0_daily_0_low = results_0_daily_0["low"];
const char* results_0_daily_0_rainfall = results_0_daily_0["rainfall"];
const char* results_0_daily_0_precip = results_0_daily_0["precip"];
const char* results_0_daily_0_wind_direction = results_0_daily_0["wind_direction"];
const char* results_0_daily_0_wind_direction_degree = results_0_daily_0["wind_direction_degree"];
const char* results_0_daily_0_wind_speed = results_0_daily_0["wind_speed"];
const char* results_0_daily_0_wind_scale = results_0_daily_0["wind_scale"];
const char* results_0_daily_0_humidity = results_0_daily_0["humidity"];
JsonObject results_0_daily_1 = results_0_daily[1];
const char* results_0_daily_1_date = results_0_daily_1["date"];
const char* results_0_daily_1_text_day = results_0_daily_1["text_day"];
const char* results_0_daily_1_code_day = results_0_daily_1["code_day"];
const char* results_0_daily_1_text_night = results_0_daily_1["text_night"];
const char* results_0_daily_1_code_night = results_0_daily_1["code_night"];
const char* results_0_daily_1_high = results_0_daily_1["high"];
const char* results_0_daily_1_low = results_0_daily_1["low"];
const char* results_0_daily_1_rainfall = results_0_daily_1["rainfall"];
const char* results_0_daily_1_precip = results_0_daily_1["precip"];
const char* results_0_daily_1_wind_direction = results_0_daily_1["wind_direction"];
const char* results_0_daily_1_wind_direction_degree = results_0_daily_1["wind_direction_degree"];
const char* results_0_daily_1_wind_speed = results_0_daily_1["wind_speed"];
const char* results_0_daily_1_wind_scale = results_0_daily_1["wind_scale"];
const char* results_0_daily_1_humidity = results_0_daily_1["humidity"];
JsonObject results_0_daily_2 = results_0_daily[2];
const char* results_0_daily_2_date = results_0_daily_2["date"];
const char* results_0_daily_2_text_day = results_0_daily_2["text_day"];
const char* results_0_daily_2_code_day = results_0_daily_2["code_day"];
const char* results_0_daily_2_text_night = results_0_daily_2["text_night"];
const char* results_0_daily_2_code_night = results_0_daily_2["code_night"];
const char* results_0_daily_2_high = results_0_daily_2["high"];
const char* results_0_daily_2_low = results_0_daily_2["low"];
const char* results_0_daily_2_rainfall = results_0_daily_2["rainfall"];
const char* results_0_daily_2_precip = results_0_daily_2["precip"];
const char* results_0_daily_2_wind_direction = results_0_daily_2["wind_direction"];
const char* results_0_daily_2_wind_direction_degree = results_0_daily_2["wind_direction_degree"];
const char* results_0_daily_2_wind_speed = results_0_daily_2["wind_speed"];
const char* results_0_daily_2_wind_scale = results_0_daily_2["wind_scale"];
const char* results_0_daily_2_humidity = results_0_daily_2["humidity"];
const char* results_0_last_update = results_0["last_update"];
// 从以上信息中摘选几个通过串口监视器显示
String results_0_daily_0_date_str = results_0_daily_0["date"].as();
String results_0_daily_0_text_day_str = results_0_daily_0["text_day"].as();
int results_0_daily_0_code_day_int = results_0_daily_0["code_day"].as();
String results_0_daily_0_text_night_str = results_0_daily_0["text_night"].as();
int results_0_daily_0_code_night_int = results_0_daily_0["code_night"].as();
int results_0_daily_0_high_int = results_0_daily_0["high"].as();
int results_0_daily_0_low_int = results_0_daily_0["low"].as();
String results_0_last_update_str = results_0["last_update"].as();
int results_0_daily_1_high_int = results_0_daily_1["high"].as();
int results_0_daily_1_low_int = results_0_daily_1["low"].as();
String results_0_daily_1_text_day_str = results_0_daily_1["text_day"].as();
Serial.println(F("======Today Weahter ======="));
Serial.print(F("DATE: "));
Serial.println(results_0_daily_0_date_str);
Serial.print(F("Day Weather: "));
Serial.print(results_0_daily_0_text_day_str);
Serial.print(F(" "));
Serial.println(results_0_daily_0_code_day_int);
Serial.print(F("Night Weather: "));
Serial.print(results_0_daily_0_text_night_str);
Serial.print(F(" "));
Serial.println(results_0_daily_0_code_night_int);
Serial.print(F("High: "));
Serial.println(results_0_daily_0_high_int);
Serial.print(F("LOW: "));
Serial.println(results_0_daily_0_low_int);
Serial.print(F("Last Update: "));
Serial.println(results_0_last_update_str);
Serial.println(F("=============================="));
display_1(results_0_daily_1_high_int,results_0_daily_1_low_int,results_0_daily_1_text_day_str);
results_0_daily_1_high_int_old=results_0_daily_1_high_int;
results_0_daily_1_low_int_old=results_0_daily_1_low_int;
results_0_daily_1_text_day_str_old=results_0_daily_1_text_day_str;
}else{
display_1(results_0_daily_1_high_int_old,results_0_daily_1_low_int_old,results_0_daily_1_text_day_str_old);
}
}
//----------预测明天天气----------
void display_1(int results_0_daily_1_high_int,int results_0_daily_1_low_int,String results_0_daily_1_text_day_str){
//显示输出
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_wqy16_t_gb2312);
u8g2.setCursor(15, 14);
u8g2.print("杭州明天天气");
u8g2.setFont(u8g2_font_logisoso24_tr);
u8g2.setCursor(20, 46);
u8g2.print(results_0_daily_1_low_int);
u8g2.setCursor(56, 46);
u8g2.print("~");
u8g2.setCursor(75, 46);
u8g2.print(results_0_daily_1_high_int);
u8g2.setCursor(30, 62);
u8g2.setFont(u8g2_font_unifont_t_chinese2);
u8g2.print(results_0_daily_1_text_day_str);
u8g2.sendBuffer();
}
/*-------- NTP 代码 ----------*/
const int NTP_PACKET_SIZE = 48; // NTP时间在消息的前48个字节里
byte packetBuffer[NTP_PACKET_SIZE]; // 输入输出包的缓冲区
time_t getNtpTime()
{
IPAddress ntpServerIP; // NTP服务器的地址
while (Udp.parsePacket() > 0)
; // 丢弃以前接收的任何数据包
Serial.println("Transmit NTP Request");
// 从池中获取随机服务器
WiFi.hostByName(ntpServerName, ntpServerIP);
Serial.print(ntpServerName);
Serial.print(": ");
Serial.println(ntpServerIP);
sendNTPpacket(ntpServerIP);
uint32_t beginWait = millis();
while (millis() - beginWait
Serial.println("Receive NTP Response");
isNTPConnected = true;
Udp.read(packetBuffer, NTP_PACKET_SIZE); // 将数据包读取到缓冲区
unsigned long secsSince1900;
// 将从位置40开始的四个字节转换为长整型，只取前32位整数部分
secsSince1900 = (unsigned long)packetBuffer[40]
int years, months, days, hours, minutes, seconds, weekdays;
years = year();
months = month();
days = day();
hours = hour();
minutes = minute();
seconds = second();
weekdays = weekday();
Serial.printf("%d/%d/%d %d:%d:%d Weekday:%d\n", years, months, days, hours, minutes, seconds, weekdays);
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_unifont_t_chinese2);
u8g2.setCursor(0, 14);
if (isNTPConnected)
{
if(timeZone>=0)
{
u8g2.print("当前时间(UTC+");
u8g2.print(timeZone);
u8g2.print(")");
}
else
{
u8g2.print("当前时间(UTC");
u8g2.print(timeZone);
u8g2.print(")");
}
}
else
u8g2.print("无网络!"); //如果上次对时失败，则会显示无网络
String currentTime = "";
if (hours |