The snippet library.
Small, practical examples. Search by task or narrow things down below.
Dispatch a one-character serial command
Arduino / C: A switch provides explicit handling for accepted and unknown commands.
Arduino / C✓ Tested
Drive the built-in LED low after turning it on
Arduino / C: digitalWrite changes the actual output level of a configured pin.
Arduino / C✓ Tested
Encode a value as little-endian bytes
Arduino / C: Store the least significant byte first when the protocol requires it.
Arduino / C✓ Tested
Explain a sketch with comments
Arduino / C: Use single-line and block comments to document what a sketch does.
Arduino / C✓ Tested
Extract a section of an Arduino String
Arduino / C: substring includes the start index and excludes the end index.
Arduino / C✓ Tested
Extract the low and high byte of a value
Arduino / C: lowByte and highByte expose the two bytes of a 16-bit value.
Arduino / C✓ Tested
Find a division remainder
Arduino / C: Find a division remainder on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Find a sample range in one pass
Arduino / C: Initialize extrema from the first element of a nonempty array.
Arduino / C✓ Tested
Find a value in a small lookup table
Arduino / C: A linear scan is simple and predictable for a small fixed array.
Arduino / C✓ Tested
Format several integers in a fixed buffer
Arduino / C: snprintf limits writes to the buffer size and includes a terminating null byte.
Arduino / C✓ Tested
Generate and measure a short output pulse
Arduino / C: delayMicroseconds can create a short blocking pulse on an output pin.
Arduino / C✓ Tested
Give an LED pin a constant name
Arduino / C: Use const to name the built-in LED pin and reuse it in output instructions.
Arduino / C✓ Tested