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60LED_WS2812B_NTP_Clock.ino
Normal file
163
60LED_WS2812B_NTP_Clock.ino
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#include <WiFi.h>
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#include "time.h"
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#include <FastLED.h>
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// LDR (GL5516 ) is connected to GPIO 34 (Analog ADC1_CH6
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// over a 56k voltage divider . Dark (0.5MOhm) , 10Lux (5-10kOhm)
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const int ldrPin = 34;
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// How many leds in your strip?
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#define NUM_LEDS 60
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#define BRIGHTNESS 30
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#define COLOR_ORDER GRB
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#define DATA_PIN 5
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// Define the array of leds
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CRGB leds[NUM_LEDS];
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volatile int interruptCounter;
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hw_timer_t * timer = NULL;
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portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
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void IRAM_ATTR onTimer() {
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portENTER_CRITICAL_ISR(&timerMux);
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interruptCounter++;
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portEXIT_CRITICAL_ISR(&timerMux);
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}
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volatile int currentSec = 59;
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volatile int currentMin = 1;
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volatile int currentHour = 1;
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// variable for storing the potentiometer value
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volatile int ldrValue = 0;
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const char* ssid = "koelner Gastzugang";
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const char* password = "deltaforce!";
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const char* ntpServer = "pool.ntp.org";
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const long gmtOffset_sec = 3600;
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const int daylightOffset_sec = 3600;
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struct tm timeinfo;
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void printLocalTime()
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{
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if (!getLocalTime(&timeinfo)) {
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Serial.println("Failed to obtain time");
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return;
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}
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Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
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}
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void syncNTP() {
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Serial.println(WiFi.getMode());
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WiFi.mode(WIFI_STA);
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delay(1000);
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WiFi.enableAP(false);
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WiFi.enableSTA(true);
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//connect to WiFi
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Serial.printf("Connecting to %s ", ssid);
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WiFi.begin(ssid, password);
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int i = 0;
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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if (i == 10) {
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break;
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}
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i++;
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}
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Serial.println(" CONNECTED");
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//init and get the time
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configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
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printLocalTime();
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//inverted logic - remaining time
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currentSec = 60 - timeinfo.tm_sec;
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currentMin = 60 - timeinfo.tm_min;
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currentHour = 12 - (timeinfo.tm_hour % 12);
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Serial.println("NTP mapped: " + String(currentHour) + ":" + String(currentMin) + ":" + String(currentSec));
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//disconnect WiFi as it's no longer needed
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WiFi.disconnect(true);
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WiFi.mode(WIFI_OFF);
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}
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void setup()
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{
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//interrupt for one second@80Mhz!
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timer = timerBegin(0, 80, true);
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timerAttachInterrupt(timer, &onTimer, true);
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timerAlarmWrite(timer, 1000000, true);
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timerAlarmEnable(timer);
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Serial.begin(9600);
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FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);
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FastLED.setBrightness( BRIGHTNESS );
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FastLED.clear();
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syncNTP();
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//currentSec = 40; currentMin = 1; currentHour=0;
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}
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void LDR() {
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//brigthness measurement
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ldrValue = analogRead(ldrPin);
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if (ldrValue == 0) {
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FastLED.setBrightness( BRIGHTNESS );
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}
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else {
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FastLED.setBrightness( int(BRIGHTNESS - BRIGHTNESS / log(ldrValue)) ); //need some logarithm
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Serial.println("Brightness: " + String( int(BRIGHTNESS - BRIGHTNESS / log(ldrValue*10))));
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}
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}
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void loop()
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{
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while (interruptCounter == 0) {
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delay(1);
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}
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if (interruptCounter > 0) {
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portENTER_CRITICAL(&timerMux);
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interruptCounter--;
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portEXIT_CRITICAL(&timerMux);
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currentSec--;
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}
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if (currentSec < 0) {
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currentSec = 59;
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currentMin--;
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LDR();
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if (currentMin < 0) {
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currentMin = 59;
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currentHour--;
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if (currentHour < 0) {
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currentHour = 11;
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timerAlarmDisable(timer);
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//ESP.restart();
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//syncNTP();
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timerAlarmEnable(timer);
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}
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}
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Serial.println("Ring Index: " + String(currentHour * 5) + ":" + String(currentMin) + ":" + String(currentSec));
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}
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//reset color
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leds[(currentSec + 1) % NUM_LEDS] = CRGB(30, 48, 40);
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leds[(currentMin + 1) % NUM_LEDS] = CRGB(30, 48, 40);
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//3 dots hour
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leds[(currentHour * 5 - 1) % NUM_LEDS] = CRGB::Gold;
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leds[(currentHour * 5) % NUM_LEDS] = CRGB::Gold;
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leds[(currentHour * 5 + 1) % NUM_LEDS] = CRGB::Gold;
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//1 dot hour marking
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for (int dot = 0; dot < NUM_LEDS; dot++) {
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if (dot % 5 == 0) {
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leds[dot] = CRGB::OrangeRed;
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}
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}
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leds[0] = CRGB::Blue; //define high noon
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//leds[NUM_LEDS / 2] = CRGB::Green; //define half noon
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leds[(currentSec + 0) % NUM_LEDS] = CRGB::Black;
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leds[(currentMin + 0) % NUM_LEDS] = CRGB::Orange;
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FastLED.show();
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}
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