Responsiveness of Photon Digital Inputs

[ScruffR]

Just recently I posted a basic outline how this could be done

Timer Based Interrupts syntax (adafruit flow meter)

There is an ingenious library that wraps the timer programming up in an easy to use way https://build.particle.io/libs/SparkIntervalTimer/1.3.7 And I’d count the sensor revolutions (and measure the speed) this way #include "SparkIntervalTimer.h" IntervalTimer msTimer; volatile uint32_t usLastTime = 0; volatile uint32_t usDeltaTime = 0; volatile uint32_t msCount = 0; volatile double revPerSec = 0; volatile double revPerMS = 0; void msISR() { revPerMS = msCount; msCount = …