Added RTC clock

Once when CT has been received, time is synced to internal RTC. When CT is not avaialble the RTC time will be shown in secondary color. This clock is also visible in AM mode.

TEF6686_ESP32.ino

@@ -4,6 +4,7 @@
 #include <EEPROM.h>
 #include <Wire.h>
 #include <math.h>
+#include <ESP32Time.h>              // https://github.com/fbiego/ESP32Time
 #include <TFT_eSPI.h>               // https://github.com/Bodmer/TFT_eSPI
 #include <Hash.h>                   // https://github.com/bbx10/Hash_tng
 #include "src/WiFiConnect.h"
@@ -64,6 +65,7 @@ bool edgebeep;
 bool externaltune;
 bool fullsearchrds;
 bool hasafold;
+bool hasCTold;
 bool haseonold;
 bool hasrtplusold;
 bool hastmcold;
@@ -80,6 +82,7 @@ bool RDSstatus;
 bool RDSstatusold;
 bool rdsstereoold;
 bool resetFontOnNextCall;
+bool rtcset;
 bool screenmute;
 bool screensavertriggered = false;
 bool seek;
@@ -338,6 +341,8 @@ unsigned long tuningtimer;
 unsigned long udptimer;
 
 TEF6686 radio;
+ESP32Time rtc(0);
+
 TFT_eSprite RadiotextSprite = TFT_eSprite(&tft);
 TFT_eSprite FrequencySprite = TFT_eSprite(&tft);
 TFT_eSprite AdvRadiotextSprite = TFT_eSprite(&tft);
@@ -948,6 +953,7 @@ void loop() {
 }
 
 void GetData() {
+  showCT();
   if (band < BAND_GAP) ShowStereoStatus();
   if (band < BAND_GAP && !menu) {
     if (advancedRDS && !afscreen && !screenmute) ShowAdvancedRDS();
@@ -956,7 +962,6 @@ void GetData() {
       showPTY();
       showECC();
       showRadioText();
-      showCT();
       if (millis() >= tuningtimer + 200) doAF();
     }
     showPI();