ESP-01 & lcd1602 网络时钟

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已于 2022-11-05 16:00:17 修改

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文章标签：网络 unix 服务器

于 2022-11-04 18:36:11 首次发布

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <Wire.h>
#include <NTPClient.h>               // Include NTPClient library
#include <TimeLib.h>                 // Include Arduino time library
#include <LiquidCrystal_I2C.h>       // Include LiquidCrystal_I2C library

LiquidCrystal_I2C lcd(0x3f, 16, 2);  // Configure LiquidCrystal_I2C library with 0x27 address, 16 columns and 2 rows

const char *ssid     = "无线名称";
const char *password = "密码";

WiFiUDP ntpUDP;

// 'time.nist.gov' is used (default server) with +8 hour offset (28800 seconds) 60 seconds (60000 milliseconds) update interval
NTPClient timeClient(ntpUDP, "time.nist.gov", 28800, 60000);

char Time[] = "TIME:00:00:00";
char Date[] = "DATE:00/00/2000";
byte last_second, second_, minute_, hour_, day_, month_;
int year_;

void setup() {

  Serial.begin(115200);
  Wire.begin(0,2);
  lcd.begin();                   // Initialize I2C LCD module (SDA = GPIO0, SCL = GPIO2)
  lcd.backlight();                   // Turn backlight ON
  lcd.setCursor(0, 0);
  lcd.print(Time);
  lcd.setCursor(0, 1);
  lcd.print(Date);

  WiFi.begin(ssid, password);

  Serial.print("Connecting.");
  while ( WiFi.status() != WL_CONNECTED ) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("connected");

  timeClient.begin();
}

void loop() {

  timeClient.update();
  unsigned long unix_epoch = timeClient.getEpochTime();    // Get Unix epoch time from the NTP server

  second_ = second(unix_epoch);
  if (last_second != second_) {

    minute_ = minute(unix_epoch);
    hour_   = hour(unix_epoch);
    day_    = day(unix_epoch);
    month_  = month(unix_epoch);
    year_   = year(unix_epoch);

    Time[12] = second_ % 10 + 48;
    Time[11] = second_ / 10 + 48;
    Time[9]  = minute_ % 10 + 48;
    Time[8]  = minute_ / 10 + 48;
    Time[6]  = hour_   % 10 + 48;
    Time[5]  = hour_   / 10 + 48;

    Date[8]  = day_   / 10 + 48; //日
    Date[9]  = day_   % 10 + 48; //日
    Date[5]  = month_  / 10 + 48; //月
    Date[6]  = month_  % 10 + 48; //月
    Date[13] = (year_   / 10) % 10 + 48;
    Date[14] = year_   % 10 % 10 + 48;

    // Send time and date to serial monitor
    Serial.println(Time);
    Serial.println(Date);

    // Display time and date on the 16x2 LCD
    lcd.setCursor(0, 0);
    lcd.print(Time);
    lcd.setCursor(0, 1);
    lcd.print(Date);

    last_second = second_;
  }

  delay(200);

}