Basic time function

ESPClock.ino

@@ -2,21 +2,77 @@
 #include <ESP8266WiFi.h>
 #include <ESP8266mDNS.h>
 #include <ArduinoOTA.h>
+#include <Adafruit_GFX.h>
+#include <Max72xxPanel.h>
 #include "secrets.h"
 
 const char* ssid = STASSID;
 const char* password = STAPSK;
 
+const int pinCS = D8; 
+const int numberOfHorizontalDisplays = 8;
+const int numberOfVerticalDisplays   = 1;
+
+Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);
+
 void setup() {
+  // Init Matrix Panel
+  matrix.setIntensity(0); // Use a value between 0 and 15 for brightness
+  for (int i=0; i<8; i++) {
+     matrix.setRotation(i,1);
+  }
+  matrix.fillScreen(LOW);
+  matrix.write();
+
+  matrix.setIntensity(8);  // set brightness 
+  
+  // Init Wifi
   WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   while (WiFi.waitForConnectResult() != WL_CONNECTED) {
     delay(5000);
     ESP.restart();
   }
+
+  // NTP Init
+  if (esp8266::coreVersionNumeric() >= 20700000) {
+     configTime("CET-1CEST-2,M3.5.0/02,M10.5.0/03", "at.pool.ntp.org"); 
+  } else {
+     setenv("TZ", "CET-1CEST-2,M3.5.0/02,M10.5.0/03",1); 
+     configTime(0, 0, "at.pool.ntp.org", "time.nist.gov");
+  }  
+
+  // Init OTA
   ArduinoOTA.begin();
 }
 
 void loop() {
+  struct tm *timeinfo;
+
+  // fetch actual time
+  time_t now = time(nullptr);
+  time(&now);
+  timeinfo=localtime(&now);
+
+  matrix.fillScreen(LOW); // clear LEDs
+
+  // display date on LED panel
+  matrix.drawChar(0,0, (timeinfo->tm_mday)/10?'0'+(timeinfo->tm_mday)/10:' ', HIGH,LOW,1);   // day of month, blank if zero
+  matrix.drawChar(6,0, '0'+(timeinfo->tm_mday)%10, HIGH,LOW,1);                              // day of month
+  matrix.drawChar(11,0,'.', HIGH,LOW,1);                                                     // .
+  matrix.drawChar(17,0, '0'+(timeinfo->tm_mon+1)/10, HIGH,LOW,1);                            // month
+  matrix.drawChar(23,0, '0'+(timeinfo->tm_mon+1)%10, HIGH,LOW,1);                            // month
+  matrix.drawChar(28,0,'.', HIGH,LOW,1);      
+
+  // display time
+  matrix.drawChar(36,0, (timeinfo->tm_hour)/10?'0'+(timeinfo->tm_hour)/10:' ', HIGH,LOW,1);  // hour, blank if zero
+  matrix.drawChar(42,0, '0'+(timeinfo->tm_hour)%10, HIGH,LOW,1);                             // hour  
+  matrix.drawChar(47,0,timeinfo->tm_sec&1?':':' ', HIGH,LOW,1);                              // blinking :
+  matrix.drawChar(52,0,'0'+(timeinfo->tm_min)/10, HIGH,LOW,1);                               // minute
+  matrix.drawChar(58,0,'0'+(timeinfo->tm_min)%10, HIGH,LOW,1);                               // minute   
+
+  matrix.write(); // Send bitmap to display
+    
+  // Over The Air Update
   ArduinoOTA.handle();
 }