ESP8266 external interrupt support.

[foxsam21]

Is this library's interrupt rotary encoder compatible with esp8266? It seems like its not because of the use of pin change interupt vs external interrupt. What can I look into to change the type of interrupt for this library?

[mathertel]

yes. I use it this way.

Here some snippets, exctracted from the RotaryElement of the HomeDing library:

globals:

RotaryEncoder *_encoder;
long _value = 0;

/**
 * @brief The interrupt service routine to check the signals from the rotary encoder 
 */
ICACHE_RAM_ATTR void _checkPosition()
{
  _encoder->tick(); // just call tick() to check the state.
}

in init():

_encoder = new RotaryEncoder(_pin1, _pin2);
pinMode(_pin1, INPUT_PULLUP);
attachInterrupt(_pin1, _checkPosition, CHANGE);
pinMode(_pin2, INPUT_PULLUP);
attachInterrupt(_pin2, _checkPosition, CHANGE);

in loop():

_encoder->tick(); // just call tick() to check the state.

long newPos = _encoder->getPosition();
if (newPos != _value) {
  _value = newPos;
  // use new _value
  ...
}