Results for “Serial protocols”
Small, practical examples. Search by task or narrow things down below.
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
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
Copy a flash string into a bounded RAM buffer
Arduino / C: strncpy_P reads from program memory into ordinary RAM.
Arduino / C✓ Tested
Copy a multibyte interrupt-owned counter atomically
Arduino / C: ATOMIC_RESTORESTATE restores the interrupt state after reading a shared value.
Arduino / C✓ Tested
Copy a string with a guaranteed terminator
Arduino / C: Reserve one character for the terminator when copying a bounded string.
Arduino / C✓ Tested
Count a button’s falling edge in the main loop
Arduino / C: Compare each reading with the previous state to detect transitions.
Arduino / C✓ Tested
Count a falling edge with an interrupt
Increment a counter when an external input changes.
attachInterrupt✓ Tested