The snippet library.
Small, practical examples. Search by task or narrow things down below.
Change an LED delay with a variable
Arduino / C: Assign a new value to a variable to change the next LED pulse duration.
Arduino / C✓ Tested
Check both ends of a range
Arduino / C: Check both ends of a range on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Check EEPROM capacity before a write
Arduino / C: length reports the available address count for this board.
Arduino / C✓ Tested
Choose the smaller of two values
Arduino / C: Choose the smaller of two values on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Clear a flag without affecting neighboring bits
Arduino / C: bitClear resets only the selected bit.
Arduino / C✓ Tested
Collect a serial line in a fixed buffer
Read a short command without dynamic String allocation.
serial line✓ Tested
Combine several Serial.print calls
Arduino / C: Combine several Serial.print calls on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Compare a command case-sensitively
Arduino / C: strcmp returns zero when both null-terminated strings match.
Arduino / C✓ Tested
Compare elapsed time across timer rollover
Use unsigned subtraction when a millisecond counter wraps.
rollover✓ Tested
Control an LED from a button
Translate an active-low button input into an LED output.
button✓ Tested
Convert a supplied ADC count to volts
Arduino / C: Scale a ten-bit ADC count using an explicit reference voltage.
Arduino / C✓ Tested
Convert Celsius to Fahrenheit
Arduino / C: Use floating-point constants to avoid integer division.
Arduino / C✓ Tested