clk.ino

#include <WiFi.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include "Adafruit_LEDBackpack.h"

#ifndef _BV
  #define _BV(bit) (1<<(bit))
#endif

//Adafruit_LEDBackpack matrix = Adafruit_LEDBackpack();

Adafruit_7segment matrix = Adafruit_7segment();

const char* ssid = "your_ssid";
const char* password = "pass";
 
/* Time Stamp */
#include <NTPClient.h>
#include <WiFiUdp.h>
 
#define NTP_OFFSET -4 * 60 * 60 // In seconds
#define NTP_INTERVAL 60 * 1000 // In miliseconds
#define NTP_ADDRESS "0.pool.ntp.org"
 
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, NTP_ADDRESS, NTP_OFFSET, NTP_INTERVAL);

uint8_t counter = 0;
bool dots = false;
void setup()
{
Serial.begin(115200);
Serial.println("");
Serial.println("Time Stamp example");
Serial.println("");
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);

matrix.begin(0x70); // pass in the ad
//for (uint8_t i=0; i<8; i++) {
    // draw a diagonal row of pixels
//    matrix.displaybuffer[i] = _BV((counter+i) % 16) | _BV((counter+i+8) % 16)  ;
//}
matrix.print(12.00);
matrix.setBrightness(1);
matrix.writeDisplay();

while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
timeClient.begin();
 
}
 
void loop()
{
timeClient.update();
String formattedTime = timeClient.getFormattedTime();
int minutes = timeClient.getMinutes();
int hours = timeClient.getHours();
matrix.writeDigitNum(4, minutes % 10);
matrix.writeDigitNum(3, minutes / 10);
matrix.drawColon(dots);
matrix.writeDigitNum(1, hours % 10);
matrix.writeDigitNum(0, hours / 10);

matrix.writeDisplay();
Serial.println(formattedTime[0] + formattedTime[1] + ':' + formattedTime[2] + formattedTime[3]);
Serial.println(formattedTime);
delay(1000);
dots = !dots;
}