Update traffic-light-arduino.ino

- Fixed resetArduino function to work on Teensy 3.x
- Concatenated help text to one long string instead of multiple Serial.println calls
- Added build date & time

traffic-light-arduino.ino

@@ -2,6 +2,8 @@
 //  Date: 1/10/2019
 //  Author: Jakub Kolodziejski
 
+#define BUILD_DATE_TIME __DATE__ " " __TIME__
+
 #define NS_GREEN 12
 #define NS_YELLOW 14
 #define NS_RED 15
@@ -31,8 +33,12 @@ unsigned long t_dot;
 bool auto_run = true;
 unsigned long uptime = 0;
 
-// Function to reset the Arduino
-void(* resetArduino) (void) = 0; //declare reset function @ address 0
+// Function to reset the Teensy 3.x
+#define SCB_AIRCR (*(volatile uint32_t *)0xE000ED0C) // Application Interrupt and Reset Control location
+void resetArduino(void) {
+  Serial.end();  //clears the serial monitor  if used
+  SCB_AIRCR = 0x05FA0004;  //write value for restart
+};
 
 // the setup routine runs once when you press reset:
 void setup() {
@@ -40,6 +46,9 @@ void setup() {
   Serial.begin(115200);
 
   Serial.println(F("\n# Serial started"));
+
+  Serial.print(F("# Build Date: "));
+  Serial.println(BUILD_DATE_TIME);
   
   // initialize the light contols pins as an output.
   pinMode(LED_BUILTIN, OUTPUT);
@@ -118,16 +127,18 @@ void loop() {
 }
 
 void help() {
-  Serial.println(F("# Command List"));
-  Serial.println(F("# ? - Print this help screen"));
-  Serial.println(F("# r - Reset the Arduino"));
-  Serial.println(F("# a - Run lights automatically"));
-  Serial.println(F("# 1 - State 1: NS red, EW red (safety delay)"));
-  Serial.println(F("# 2 - State 2: NS green, EW red"));
-  Serial.println(F("# 3 - State 3: NS yellow, EW red"));
-  Serial.println(F("# 4 - State 4: NS red, EW red (safety delay)"));
-  Serial.println(F("# 5 - State 5: NS red, EW green"));
-  Serial.println(F("# 6 - State 6: NS red, EW yellow"));
+  Serial.print(F("# Build Date: "));
+  Serial.println(BUILD_DATE_TIME);
+  Serial.println(F( "# Command List\n"
+                    "# ? - Print this help screen\n"
+                    "# r - Reset the Arduino\n"
+                    "# a - Run lights automatically\n"
+                    "# 1 - State 1: NS red, EW red (safety delay)\n"
+                    "# 2 - State 2: NS green, EW red\n"
+                    "# 3 - State 3: NS yellow, EW red\n"
+                    "# 4 - State 4: NS red, EW red (safety delay)\n"
+                    "# 5 - State 5: NS red, EW green\n"
+                    "# 6 - State 6: NS red, EW yellow"));
 }
 
 void all_off() {