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#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <WiFiUdp.h>
#include <FastLED.h>
#define DEBUG_ON
const char ssid[] = "*"; // Your network SSID name here
const char pass[] = "*"; // Your network password here
unsigned long timeZone = 1.0; // Change this value to your local timezone (in my case +1 for Amsterdam)
// Change the colors here if you want.
// Check for reference: https://github.com/FastLED/FastLED/wiki/Pixel-reference#predefined-colors-list
// You can also set the colors with RGB values, for example red:
// CRGB colorHour = CRGB(255, 0, 0);
CRGB colorHour = CRGB::Red;
CRGB colorMinute = CRGB::Green;
CRGB colorSecond = CRGB::Blue;
CRGB colorHourMinute = CRGB::Yellow;
CRGB colorHourSecond = CRGB::Magenta;
CRGB colorMinuteSecond = CRGB::Cyan;
CRGB colorAll = CRGB::White;
// Set this to true if you want the hour LED to move between hours (if set to false the hour LED will only move every hour)
#define USE_LED_MOVE_BETWEEN_HOURS true
// Cutoff times for day / night brightness.
#define USE_NIGHTCUTOFF false // Enable/Disable night brightness
#define MORNINGCUTOFF 8 // When does daybrightness begin? 8am
#define NIGHTCUTOFF 20 // When does nightbrightness begin? 10pm
#define NIGHTBRIGHTNESS 20 // Brightness level from 0 (off) to 255 (full brightness)
ESP8266WiFiMulti wifiMulti;
WiFiUDP UDP;
IPAddress timeServerIP;
const char* NTPServerName = "time.nist.gov";
const int NTP_PACKET_SIZE = 48;
byte NTPBuffer;
unsigned long intervalNTP = 5 * 60000; // Request NTP time every 5 minutes
unsigned long prevNTP = 0;
unsigned long lastNTPResponse = millis();
uint32_t timeUNIX = 0;
unsigned long prevActualTime = 0;
#define LEAP_YEAR(Y) ( ((1970+Y)>0) && !((1970+Y)%4) && ( ((1970+Y)%100) || !((1970+Y)%400) ) )
static const uint8_t monthDays[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
#define NUM_LEDS 60
#define DATA_PIN D6;
CRGB LEDs;
struct DateTime {
intyear;
byte month;
byte day;
byte hour;
byte minute;
byte second;
byte dayofweek;
};
DateTime currentDateTime;
void setup() {
FastLED.delay(3000);
FastLED.addLeds<WS2812B, DATA_PIN, GRB>(LEDs, NUM_LEDS);
Serial.begin(115200);
delay(10);
Serial.println("\r\n");
startWiFi();
startUDP();
if(!WiFi.hostByName(NTPServerName, timeServerIP)) {
Serial.println("DNS lookup failed. Rebooting.");
Serial.flush();
ESP.reset();
}
Serial.print("Time server IP:\t");
Serial.println(timeServerIP);
Serial.println("\r\nSending NTP request ...");
sendNTPpacket(timeServerIP);
}
void loop() {
unsigned long currentMillis = millis();
if (currentMillis - prevNTP > intervalNTP) { // If a minute has passed since last NTP request
prevNTP = currentMillis;
Serial.println("\r\nSending NTP request ...");
sendNTPpacket(timeServerIP); // Send an NTP request
}
uint32_t time = getTime(); // Check if an NTP response has arrived and get the (UNIX) time
if (time) { // If a new timestamp has been received
timeUNIX = time;
Serial.print("NTP response:\t");
Serial.println(timeUNIX);
lastNTPResponse = currentMillis;
} else if ((currentMillis - lastNTPResponse) > 3600000) {
Serial.println("More than 1 hour since last NTP response. Rebooting.");
Serial.flush();
ESP.reset();
}
uint32_t actualTime = timeUNIX + (currentMillis - lastNTPResponse)/1000;
if (actualTime != prevActualTime && timeUNIX != 0) { // If a second has passed since last update
prevActualTime = actualTime;
convertTime(actualTime);
for (int i=0; i<NUM_LEDS; i++)
LEDs = CRGB::Black;
int second = getLEDMinuteOrSecond(currentDateTime.second);
int minute = getLEDMinuteOrSecond(currentDateTime.minute);
int hour = getLEDHour(currentDateTime.hour, currentDateTime.minute);
// Set "Hands"
LEDs = colorSecond;
LEDs = colorMinute;
LEDs = colorHour;
// Hour and min are on same spot
if ( hour == minute)
LEDs = colorHourMinute;
// Hour and sec are on same spot
if ( hour == second)
LEDs = colorHourSecond;
// Min and sec are on same spot
if ( minute == second)
LEDs = colorMinuteSecond;
// All are on same spot
if ( minute == second && minute == hour)
LEDs = colorAll;
if ( night() && USE_NIGHTCUTOFF == true )
FastLED.setBrightness (NIGHTBRIGHTNESS);
FastLED.show();
}
}
byte getLEDHour(byte hours, byte minutes) {
if (hours > 12)
hours = hours - 12;
byte hourLED;
if (hours <= 5)
hourLED = (hours * 5) + 30;
else
hourLED = (hours * 5) - 30;
if (USE_LED_MOVE_BETWEEN_HOURS == true) {
if (minutes >= 12 && minutes < 24) {
hourLED += 1;
} else if (minutes >= 24 && minutes < 36) {
hourLED += 2;
} else if (minutes >= 36 && minutes < 48) {
hourLED += 3;
} else if (minutes >= 48) {
hourLED += 4;
}
}
return hourLED;
}
byte getLEDMinuteOrSecond(byte minuteOrSecond) {
if (minuteOrSecond < 30)
return minuteOrSecond + 30;
else
return minuteOrSecond - 30;
}
void startWiFi() {
wifiMulti.addAP(ssid, pass);
Serial.println("Connecting");
byte i = 0;
while (wifiMulti.run() != WL_CONNECTED) {
delay(250);
Serial.print('.');
LEDs = CRGB::Green;
FastLED.show();
}
Serial.println("\r\n");
Serial.print("Connected to ");
Serial.println(WiFi.SSID());
Serial.print("IP address:\t");
Serial.print(WiFi.localIP());
Serial.println("\r\n");
}
void startUDP() {
Serial.println("Starting UDP");
UDP.begin(123); // Start listening for UDP messages on port 123
Serial.print("Local port:\t");
Serial.println(UDP.localPort());
Serial.println();
}
uint32_t getTime() {
if (UDP.parsePacket() == 0) { // If there's no response (yet)
return 0;
}
UDP.read(NTPBuffer, NTP_PACKET_SIZE); // read the packet into the buffer
// Combine the 4 timestamp bytes into one 32-bit number
uint32_t NTPTime = (NTPBuffer << 24) | (NTPBuffer << 16) | (NTPBuffer << 8) | NTPBuffer;
// Convert NTP time to a UNIX timestamp:
// Unix time starts on Jan 1 1970. That's 2208988800 seconds in NTP time:
const uint32_t seventyYears = 2208988800UL;
// subtract seventy years:
uint32_t UNIXTime = NTPTime - seventyYears;
return UNIXTime;
}
void sendNTPpacket(IPAddress& address) {
memset(NTPBuffer, 0, NTP_PACKET_SIZE);// set all bytes in the buffer to 0
// Initialize values needed to form NTP request
NTPBuffer = 0b11100011; // LI, Version, Mode
// send a packet requesting a timestamp:
UDP.beginPacket(address, 123); // NTP requests are to port 123
UDP.write(NTPBuffer, NTP_PACKET_SIZE);
UDP.endPacket();
}
void convertTime(uint32_t time) {
// Correct time zone
time += (3600 * timeZone);
currentDateTime.second = time % 60;
currentDateTime.minute = time / 60 % 60;
currentDateTime.hour = time / 3600 % 24;
time/= 60;// To minutes
time/= 60;// To hours
time/= 24;// To days
currentDateTime.dayofweek = ((time + 4) % 7) + 1;
int year = 0;
int days = 0;
while ((unsigned)(days += (LEAP_YEAR(year) ? 366 : 365)) <= time) {
year++;
}
days -= LEAP_YEAR(year) ? 366 : 365;
time-= days; // To days in this year, starting at 0
days = 0;
byte month = 0;
byte monthLength = 0;
for (month = 0; month < 12; month++) {
if (month == 1) { // February
if (LEAP_YEAR(year)) {
monthLength = 29;
} else {
monthLength = 28;
}
} else {
monthLength = monthDays;
}
if (time >= monthLength) {
time -= monthLength;
} else {
break;
}
}
currentDateTime.day = time + 1;
currentDateTime.year = year + 1970;
currentDateTime.month = month + 1;
// Correct European Summer time
if (summerTime()) {
currentDateTime.hour += 1;
}
#ifdef DEBUG_ON
Serial.print(currentDateTime.year);
Serial.print(" ");
Serial.print(currentDateTime.month);
Serial.print(" ");
Serial.print(currentDateTime.day);
Serial.print(" ");
Serial.print(currentDateTime.hour);
Serial.print(" ");
Serial.print(currentDateTime.minute);
Serial.print(" ");
Serial.print(currentDateTime.second);
Serial.print(" day of week: ");
Serial.print(currentDateTime.dayofweek);
Serial.print(" summer time: ");
Serial.print(summerTime());
Serial.print(" night time: ");
Serial.print(night());
Serial.println();
#endif
}
boolean summerTime() {
if (currentDateTime.month < 3 || currentDateTime.month > 10) return false;// No summer time in Jan, Feb, Nov, Dec
if (currentDateTime.month > 3 && currentDateTime.month < 10) return true; // Summer time in Apr, May, Jun, Jul, Aug, Sep
if (currentDateTime.month == 3 && (currentDateTime.hour + 24 * currentDateTime.day) >= (3 +24 * (31 - (5 * currentDateTime.year / 4 + 4) % 7)) || currentDateTime.month == 10 && (currentDateTime.hour + 24 * currentDateTime.day) < (3 +24 * (31 - (5 * currentDateTime.year / 4 + 1) % 7)))
return true;
else
return false;
}
boolean night() {
if (currentDateTime.hour >= NIGHTCUTOFF && currentDateTime.hour <= MORNINGCUTOFF)
return true;
}
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