The snippet library.
Small, practical examples. Search by task or narrow things down below.
Print a single character
Arduino / C: Print a single character on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Print integers in different bases
Inspect a byte in decimal, hexadecimal, and binary.
Serial✓ Tested
Print once from setup
Arduino / C: Print once from setup on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Read 16-bit values from a flash table
Arduino / C: pgm_read_word retrieves a complete word from program memory.
Arduino / C✓ Tested
Read a button in the Serial Monitor
Arduino / C: Use a pull-up input and if/else to report three button readings.
Arduino / C✓ Tested
Read a button with the internal pull-up
Treat a grounded input as a pressed button.
INPUT_PULLUP✓ Tested
Read a byte lookup table from flash
Arduino / C: PROGMEM tables require the AVR program-memory access functions.
Arduino / C✓ Tested
Read a decimal number from serial input
Arduino / C: parseFloat parses a signed decimal value from the input stream.
Arduino / C✓ Tested
Read a fixed-size serial payload
Arduino / C: readBytes returns the number of bytes actually received.
Arduino / C✓ Tested
Read an integer from serial input
Arduino / C: parseInt skips leading nonnumeric characters and reads the next integer.
Arduino / C✓ Tested
Read an unpressed button with an internal pull-up
Arduino / C: An open input configured with INPUT_PULLUP reads high.
Arduino / C✓ Tested
Read and total a flash lookup table
Arduino / C: Array size can be computed at compile time even for a flash-resident table.
Arduino / C✓ Tested