Arduino logging library

This library allows you to log data to an Arduino. It supports Serial logging to the Arduino/ESP serial port.

printf format support

This library supports printf format strings.

e.g. %[flags][width][.precision][length]specifier

• specifier

  specifier	Output	**Example **
  d or i	Signed decimal integer	392
  u	Unsigned decimal integer	7235
  o	Unsigned octal	610
  x	Unsigned hexadecimal integer	7fa
  X	Unsigned hexadecimal integer (uppercase)	7FA
  f	Decimal floating point, lowercase	392.65
  F	Decimal floating point, uppercase	392.65
  e	Scientific notation (mantissa/exponent), lowercase	3.9265e+2
  E	Scientific notation (mantissa/exponent), uppercase	3.9265E+2
  g	Use the shortest representation: %e or %f	392.65
  G	Use the shortest representation: %E or %F	392.65
  a	Hexadecimal floating point, lowercase	-0xc.90fep-2
  A	Hexadecimal floating point, uppercase	-0XC.90FEP-2
  c	Character	a
  s	String of characters	sample
  p	Pointer address	b8000000
  n	Nothing printed. The corresponding argument must be a pointer to a signed int. The number of characters written so far is stored in the pointed location.

see: https://cplusplus.com/reference/cstdio/printf/ for more details.

Usage

#include <Arduino.h>
#include <logging.h>

Logging logging;

void setup() {
  logging.begin(9600);
}

void loop() {
  LogTrace("Hello world!");
  LogDebug("Debug message for %d integers", 42);
  LogInfo("Info message for %d integers", 42);
  LogWarn("Info message for %d integers", 42);
  LogErr("This is an error message");
  delay(1000);
}

Support

Tested on:

• Arduino Uno
• Expressif ESP8266

License

MIT

Author

@kbeaugrand