Add time display, set by NTP

platformio.ini

@@ -21,4 +21,5 @@ lib_deps =
 	bblanchon/ArduinoJson@^6.19.4
 	olikraus/U8g2@^2.34.4
 	tzapu/WiFiManager@^0.16.0
+	paulstoffregen/Time@^1.6.1
 monitor_speed = 115200

src/display.cpp

@@ -42,6 +42,8 @@ char* title_grid;
 
 bool pv_charging = false;
 bool show_temp_outside;
+int time_hour;
+int time_minute;
 float temperature_outside;
 char* screenbuffer;
 
@@ -54,6 +56,11 @@ void display_temp_outside(float mqtt_temp_outside) {
     temperature_outside = mqtt_temp_outside;
 }
 
+void display_time(int hour, int minute) {
+    time_hour = hour;
+    time_minute = minute;
+}
+
 void display_begin() {
     display.begin();
 }
@@ -107,11 +114,20 @@ void display_header(char* TEXT) {
     display.setFont(u8g2_font_6x10_tr);
     display.drawStr(2,7,TEXT);
     display.drawLine(0, 8, 128, 8);
-    display.drawLine(94, 0, 94, 8);
-    display.drawLine(62, 0, 62, 8);
+    display.drawLine(93, 0, 93, 8);
+    display.setCursor(97,7); 
+    if (time_hour < 10) {
+        display.print("0");
+    }
+    display.print(time_hour); display.print(":");
+    if (time_minute < 10) {
+        display.print("0");
+    }
+    display.print(time_minute);
     if (show_temp_outside)
     {
-        display.setCursor(70,7); display.print(temperature_outside,1); display.print("C");
+        display.drawLine(58, 0, 58, 8);
+        display.setCursor(67,7); display.print(temperature_outside,1); display.print("C");
     }
     
 }

src/display.h

@@ -24,6 +24,7 @@
 */
 void display_setup(bool set_show_temp_outside,char lang[2]);
 void display_temp_outside(float temperature_outside);
+void display_time(int hour, int minute);
 void display_begin();
 void display_init(char* VERSION);
 void display_logo();

src/main.cpp

@@ -42,13 +42,16 @@
 #include <ArduinoJson.h>
 #include <Wire.h>
 #include <U8g2lib.h>
+#include "time.h"
 
 //Program parts
 #include <pins.h>
 #include <lang.h>
 #include <display.h>
 
-char VERSION[6] = "v0.7b";
+char VERSION[6] = "v0.8c";
+#define TimeZone "CET-1CEST,M3.5.0,M10.5.0/3"
+#define TimeServ "pool.ntp.org"
 
 //Defaults
 char mqtt_server[15] = "";
@@ -96,6 +99,11 @@ void saveConfigCallback () {
 WiFiClient espClient;
 PubSubClient client(espClient);
 
+//Time library setup
+time_t now;
+tm tm;
+
+
 //Globals
 long lastMsg = 0;
 char msg[50];
@@ -447,6 +455,17 @@ void setup() {
     //end save
   }
 
+  //NTP setup
+  #ifdef ESP32
+    configTime(0, 0, TimeServ);
+    setenv("TZ", TimeZone, 1);
+    tzset();
+  #endif
+  #ifdef ESP8266
+    configTime(TimeZone, TimeServ);
+  #endif
+
+
   delay(1000); //for screen display
 
   //Generate mqtt topics from id and address
@@ -523,6 +542,8 @@ void loop() {
   {
     if(millis() - lastScreenChangeTime >= DISPLAY_SCREEN_INTERVAL)
 	  {
+      time(&now); localtime_r(&now, &tm); //Get local time
+      display_time(tm.tm_hour, tm.tm_min);
       display_screen++;
 		  lastScreenChangeTime += DISPLAY_SCREEN_INTERVAL;
       if (display_screen == display_last_screen + 1)