The snippet library.
Small, practical examples. Search by task or narrow things down below.
Read back a configured digital output
Arduino / C: digitalRead observes the pin’s digital level after an output write.
Arduino / C✓ Tested
Read one character from serial input
Wait for an incoming byte without blocking the main loop.
Serial.available✓ Tested
Read serial text up to a delimiter
Arduino / C: readBytesUntil excludes the delimiter and does not add a null terminator.
Arduino / C✓ Tested
Reject an integer with trailing characters
Arduino / C: strtol exposes an end pointer so a parser can require the entire token.
Arduino / C✓ Tested
Reject an unsupported settings version
Arduino / C: A version byte lets firmware fall back when stored settings use another format.
Arduino / C✓ Tested
Reject insertion when a fixed queue is full
Arduino / C: Track a count separately from circular read and write positions.
Arduino / C✓ Tested
Reject one outlier with a median-of-three filter
Arduino / C: Sorting three values leaves the median in the middle.
Arduino / C✓ Tested
Repeat a serial message three times
Arduino / C: Repeat a serial message three times on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Repeat an action a fixed number of times
Use a counter and delay for a simple finite sequence.
for loop✓ Tested
Replace a token inside an Arduino String
Arduino / C: replace modifies all occurrences in the existing object.
Arduino / C✓ Tested
Represent a decimal quantity with a scaled integer
Arduino / C: Integer hundredths avoid floating-point storage for fixed-precision values.
Arduino / C✓ Tested
Represent an enabled state
Arduino / C: Represent an enabled state on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested