用ESP8266做的RGB时钟，文末附代码、电路图等资源

#include <ESP8266WiFi.h>#include <Adafruit_NeoPixel.h>#include <WiFiUdp.h>#include <NTPClient.h>#include <TimeLib.h>#include <DHT.h>#include <Adafruit_Sensor.h>

#define PIXEL_PER_SEGMENT 2 // Number of LEDs in each Segment#define PIXEL_DIGITS 4 // Number of connected Digits#define PIXEL_PIN 2 // GPIO Pin#define PIXEL_DASH 1 // Binary segment#define LDR_PIN A0 // LDR pin#define DHT_PIN 13 // DHT Sensor pin#define BUTTON_PIN 12 // Button pin

WiFi.begin(ssid, password);Serial.print("Connecting.");while ( WiFi.status() != WL_CONNECTED )

void disp_Time() {clearDisplay();writeDigit(0, Hour / 10);writeDigit(1, Hour % 10);writeDigit(2, Minute / 10);writeDigit(3, Minute % 10);writeDigit(4, Second / 10);writeDigit(5, Second % 10);disp_Dash();

if (index == 0 || index == 1 ) color = strip.Color(0, Brightness, 0);if (index == 2 || index == 3 ) color = strip.Color(0, Brightness, 0);if (index == 4 || index == 5 ) color = strip.Color(Brightness, 0, 0);

#include <ESP8266WiFi.h>#include <Adafruit_NeoPixel.h>#include <WiFiUdp.h>#include <NTPClient.h>#include <TimeLib.h>#include <DHT.h>#include <Adafruit_Sensor.h>
#define PIXEL_PER_SEGMENT  2     // Number of LEDs in each Segment#define PIXEL_DIGITS       4     // Number of connected Digits #define PIXEL_PIN          2     // GPIO Pin#define PIXEL_DASH         1    // Binary segment
#define LDR_PIN       A0    // LDR pin#define DHT_PIN       13    // DHT Sensor pin#define BUTTON_PIN    12    // Button pin
// Uncomment the type of sensor in use#define DHT_TYPE    DHT11     // DHT 11//#define DHT_TYPE    DHT22     // DHT 22 (AM2302)//#define DHT_TYPE    DHT21     // DHT 21 (AM2301)
#define TIME_FORMAT        12    // 12 = 12 hours format || 24 = 24 hours format 
Adafruit_NeoPixel strip = Adafruit_NeoPixel((PIXEL_PER_SEGMENT * 7 * PIXEL_DIGITS) + (PIXEL_DASH * 2), PIXEL_PIN, NEO_GRB + NEO_KHZ800);DHT dht(DHT_PIN, DHT_TYPE);
// set Wi-Fi SSID and passwordconst char *ssid     = "Hackster";const char *password = "Sainisagar7294";
WiFiUDP ntpUDP;// 'time.nist.gov' is used (default server) with +1 hour offset (3600 seconds) 60 seconds (60000 milliseconds) update intervalNTPClient timeClient(ntpUDP, "time.nist.gov", 19800, 60000); //GMT+5:30 : 5*3600+30*60=19800
int period = 2000;   //Update frequencyunsigned long time_now = 0;int Second, Minute, Hour;
// set default brightnessint Brightness = 40;// current temperature, updated in loop()int Temperature;
bool Show_Temp = false;
//Digits arraybyte digits[12] = {  //abcdefg  0b1111110,     // 0  0b0110000,     // 1  0b1101101,     // 2  0b1111001,     // 3  0b0110011,     // 4  0b1011011,     // 5  0b1011111,     // 6  0b1110000,     // 7  0b1111111,     // 8  0b1110011,      // 9  0b1001110,     // C  0b1000111,     // F};
//Clear all the Pixelsvoid clearDisplay() {  for (int i = 0; i < strip.numPixels(); i++) {    strip.setPixelColor(i, strip.Color(0, 0, 0));  }  strip.show();}
void setup() {  Serial.begin(115200);  strip.begin();  strip.show();
  dht.begin();  pinMode(BUTTON_PIN, INPUT);
  WiFi.begin(ssid, password);  Serial.print("Connecting.");  while ( WiFi.status() != WL_CONNECTED ) {    delay(500);    Serial.print(".");  }  Serial.println("connected");  timeClient.begin();  delay(10);}
void loop() {  if (WiFi.status() == WL_CONNECTED) { // check WiFi connection status    int sensor_val = analogRead(LDR_PIN);    Brightness =40;    timeClient.update();    int Hours;    unsigned long unix_epoch = timeClient.getEpochTime();   // get UNIX Epoch time    Second = second(unix_epoch);                            // get seconds    Minute = minute(unix_epoch);                            // get minutes    Hours  = hour(unix_epoch);                              // get hours
    if (TIME_FORMAT == 12) {      if (Hours > 12) {        Hour = Hours - 12;      }      else        Hour = Hours;    }    else      Hour = Hours;  }
  if (digitalRead(BUTTON_PIN) == LOW) {    Show_Temp = true;  }  else    Show_Temp = false;
  if (Show_Temp) {    Temperature = dht.readTemperature();    Serial.println(Temperature);    clearDisplay();    writeDigit(0, Temperature / 10);    writeDigit(1, Temperature % 10);    writeDigit(2, 10);    strip.setPixelColor(28, strip.Color(Brightness, Brightness,  Brightness));    strip.show();    delay(3000);    clearDisplay();    Show_Temp = false;  }  while (millis() > time_now + period) {    time_now = millis();    disp_Time();     // Show Time  }}
void disp_Time() {  clearDisplay();  writeDigit(0, Hour / 10);  writeDigit(1, Hour % 10);  writeDigit(2, Minute / 10);  writeDigit(3, Minute % 10);  writeDigit(4, Second / 10);  writeDigit(5, Second % 10);  disp_Dash();  strip.show();}
void disp_Dash() {  int dot, dash;  for (int i = 0; i < 2; i++) {    dot = 2 * (PIXEL_PER_SEGMENT * 7) + i;    for (int j = 0; j < PIXEL_DASH; j++) {      dash = dot + j * (2 * (PIXEL_PER_SEGMENT * 7) + 2);      Second % 2 == 0 ? strip.setPixelColor(dash, strip.Color(0,Brightness ,0)) : strip.setPixelColor(dash, strip.Color(0, Brightness,0));    }  }}
void writeDigit(int index, int val) {  byte digit = digits[val];  int margin;  if (index == 0 || index == 1 ) margin = 0;  if (index == 2 || index == 3 ) margin = 1;  if (index == 4 || index == 5 ) margin = 2;  for (int i = 6; i >= 0; i--) {    int offset = index * (PIXEL_PER_SEGMENT * 7) + i * PIXEL_PER_SEGMENT + margin * 2;    uint32_t color;    if (digit & 0x01 != 0) {      if (index == 0 || index == 1 ) color = strip.Color(Brightness, 0,  Brightness);      if (index == 2 || index == 3 ) color = strip.Color(Brightness, 0,Brightness);      if (index == 4 || index == 5 ) color = strip.Color(Brightness, 0,  0);    }    else      color = strip.Color(0, 0, 0);
    for (int j = offset; j < offset + PIXEL_PER_SEGMENT; j++) {      strip.setPixelColor(j, color);    }    digit = digit >> 1;  }}