Problem with watches on esp32

Posted on Sun 10th, February 2019

• #1

fanThomas

I tried to use a watch on a esp32 where I got the following error:

setWatch(function(st) { console.log(st.time) }, D4, {repeat: false, edge: 'falling', debounce: 10});
WARNING: Unable to set watch. You may already have a watch on a pin with the same number (eg. A0 and B0),
or this pin cannot be used with watch

I also tried other pins which should work without luck. I am using esruino 2v00 on a esp32s chip. On espruino 2v01 i get the same message.

• #2

JumJum

Only a few pins are available for setWatch. Its checked with jshCanWatch in targets/ESP32/jshardware.c
Just checked with D12 and that works.

bool jshCanWatch(
    Pin pin //!< The pin that we are asking whether or not we can watch it.
  ) {
  return pin == 0 || ( pin >= 12 && pin <= 19 ) || pin == 21 ||  pin == 22 || ( pin >= 25 && pin <= 27 ) || ( pin >= 34 && pin <= 39 );
}

• #3

fanThomas

That solved the problem. Thanks alot!

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Problem with watches on esp32

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Problem with watches on esp32

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Problem with watches on esp32

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Problem with watches on esp32

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Espruino