Minor improvements.

ESPClock.ino

@@ -24,7 +24,14 @@ void setup() {
   matrix.fillScreen(LOW);
   matrix.write();
 
-  matrix.setIntensity(8);  // set brightness 
+  matrix.setIntensity(analogRead(A0)/64);  // set brightness 
+
+  matrix.drawChar(2,0, 'W', HIGH,LOW,1); // W
+  matrix.drawChar(8,0, '-', HIGH,LOW,1); // W-  
+  matrix.drawChar(14,0,'L', HIGH,LOW,1); // W-L
+  matrix.drawChar(20,0,'A', HIGH,LOW,1); // W-LA
+  matrix.drawChar(26,0,'N', HIGH,LOW,1); // W-LAN
+  matrix.write(); // Send bitmap to display
   
   // Init Wifi
   WiFi.mode(WIFI_STA);
@@ -42,6 +49,35 @@ void setup() {
      configTime(0, 0, "at.pool.ntp.org", "time.nist.gov");
   }  
 
+  // Display message on OTA update
+  ArduinoOTA.onStart([]() {    
+    matrix.fillScreen(LOW);
+    matrix.drawChar(2,0, 'U', HIGH,LOW,1); 
+    matrix.drawChar(8,0, 'p', HIGH,LOW,1);
+    matrix.drawChar(14,0,'d', HIGH,LOW,1);
+    matrix.drawChar(20,0,'a', HIGH,LOW,1);
+    matrix.drawChar(26,0,'t', HIGH,LOW,1);
+    matrix.drawChar(32,0,'e', HIGH,LOW,1);  // Update
+    matrix.setIntensity(analogRead(A0)/64);    
+    matrix.write(); // Send bitmap to display
+  });
+
+  // Use dots to indicate the progress of the OTA update
+  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
+    matrix.setIntensity(analogRead(A0)/64);
+    if (progress/(total/100)>25) {
+      matrix.drawChar(38,0,'.', HIGH,LOW,1);
+      matrix.write();
+    }
+    if (progress/(total/100)>50) {
+      matrix.drawChar(44,0,'.', HIGH,LOW,1);
+      matrix.write();
+    }
+    if (progress/(total/100)>75) {
+      matrix.drawChar(50,0,'.', HIGH,LOW,1);
+      matrix.write();
+    }
+  });
   // Init OTA
   ArduinoOTA.begin();
 }
@@ -56,21 +92,33 @@ void loop() {
 
   matrix.fillScreen(LOW); // clear LEDs
 
-  // display date on LED panel
+  if (timeinfo->tm_year==70) {
-  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(2,0, 'T', HIGH,LOW,1); // H
-  matrix.drawChar(11,0,'.', HIGH,LOW,1);                                                     // .
+     matrix.drawChar(8,0, 'I', HIGH,LOW,1); // HH  
-  matrix.drawChar(17,0, '0'+(timeinfo->tm_mon+1)/10, HIGH,LOW,1);                            // month
+     matrix.drawChar(14,0,'M', HIGH,LOW,1); // HH:
-  matrix.drawChar(23,0, '0'+(timeinfo->tm_mon+1)%10, HIGH,LOW,1);                            // month
+     matrix.drawChar(20,0,'E', HIGH,LOW,1); // HH:M
-  matrix.drawChar(28,0,'.', HIGH,LOW,1);      
+    
-
+  } else {
-  // display time
+
-  matrix.drawChar(36,0, (timeinfo->tm_hour)/10?'0'+(timeinfo->tm_hour)/10:' ', HIGH,LOW,1);  // hour, blank if zero
+     // display date on LED panel
-  matrix.drawChar(42,0, '0'+(timeinfo->tm_hour)%10, HIGH,LOW,1);                             // hour  
+     matrix.drawChar(0,0, (timeinfo->tm_mday)/10?'0'+(timeinfo->tm_mday)/10:' ', HIGH,LOW,1);   // day of month, blank if zero
-  matrix.drawChar(47,0,timeinfo->tm_sec&1?':':' ', HIGH,LOW,1);                              // blinking :
+     matrix.drawChar(6,0, '0'+(timeinfo->tm_mday)%10, HIGH,LOW,1);                              // day of month
-  matrix.drawChar(52,0,'0'+(timeinfo->tm_min)/10, HIGH,LOW,1);                               // minute
+     matrix.drawChar(11,0,'.', HIGH,LOW,1);                                                     // .
-  matrix.drawChar(58,0,'0'+(timeinfo->tm_min)%10, HIGH,LOW,1);                               // minute   
+     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.setIntensity(analogRead(A0)/64);
   matrix.write(); // Send bitmap to display
     
   // Over The Air Update