rotary encoder strange behavior (too many datas)

OK thank you @Gordon

the final solution was the pull_up

function onInit() {
  var value = 0;
  pinMode(A8, 'input_pullup');
  pinMode(A5, 'input_pullup');
  setWatch(function(e) {
    if (e.data) value++ else value--;
    print(value);
    }, A5, {data:A8, repeat:true, edge:'falling'});
}

the value increases and decreases according to the rotation.

é.