Provides printf-style formatting over serial.
printf allows strings to be built by combining a number of values with text.
Serial.printf("Reading temperature sensor at %s...", Time.timeStr().c_str()); float temp = readTemp(); Serial.printf("the temperature today is %f Kelvin", temp); Serial.println();
Running this code prints:
Reading temperature sensor at Thu 01 Oct 2015 12:34...the temperature today is 293.1 Kelvin.
printf() call could be changed to
printlnf() to avoid a separate call to