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Debug and Watchdog

Command	Description
`debugStart()`, `debugStart(baud)`, `debugStart(serial, baud)`	Starts debug output and the port.
`debug()`, `debugln()`	Outputs values only when debugging is enabled.
`debugStop()`, `debugState()`	Stops output or checks the state.
`WDT_ENABLE(time)`	Sets the Watchdog timeout and enables it.
`WDT()`	Refreshes the Watchdog before its timeout expires.
`WDT_DISABLE()`	Disables the Watchdog.

void setup() {
  debugStart(115200);
  WDT_ENABLE(WDT_2S);
}
void loop() {
  debugln("running");
  WDT();
}

Command Prototypes

Return Type	Command Prototype
`void`	`debugStart()`
`void`	`debugStart(unsigned long baudrate)`
`void`	`debugStart(HardwareSerial& serialPort)`
`void`	`debugStart(HardwareSerial& serialPort, unsigned long baudrate, uint8_t config = SERIAL_8N1)`
`void`	`debugStop()`
`bool`	`debugState()`
`void`	`debug(const __FlashStringHelper* value)`
`void`	`debug(const String& value)`
`void`	`debug(const char value[])`
`void`	`debug(char value)`
`void`	`debug(unsigned char value, int base = DEC)`
`void`	`debug(int value, int base = DEC)`
`void`	`debug(unsigned int value, int base = DEC)`
`void`	`debug(long value, int base = DEC)`
`void`	`debug(unsigned long value, int base = DEC)`
`void`	`debug(double value, int digits = 2)`
`void`	`debugln()`
`void`	`debugln(const __FlashStringHelper* value)`
`void`	`debugln(const String& value)`
`void`	`debugln(const char value[])`
`void`	`debugln(char value)`
`void`	`debugln(unsigned char value, int base = DEC)`
`void`	`debugln(int value, int base = DEC)`
`void`	`debugln(unsigned int value, int base = DEC)`
`void`	`debugln(long value, int base = DEC)`
`void`	`debugln(unsigned long value, int base = DEC)`
`void`	`debugln(double value, int digits = 2)`
`void`	`WDT_ENABLE(uint8_t ms)`
`void`	`WDT_DISABLE()`
`void`	`WDT()`

Watchdog time constants differ by CPU. Select a timeout comfortably longer than the worst-case communication wait and loop execution time.