PUCK Ble HID keyboard

Ok, so I checked into this and it actually is an issue with the amount of nesting. Not the stack as such but the execution scopes:

Uncaught Error: Maximum number of scopes exceeded

There's an issue open for this at the moment but I honestly didn't think people were really hitting it: https://github.com/espruino/Espruino/iss­ues/948

If this has been causing a lot of problems then I could look into fixing it sooner rather than later though.

While @allObjects has posted a good solution above, here's the complete code that I just tested and which seems to work ok.

var kb = require("ble_hid_keyboard");
NRF.setServices(undefined, { hid : kb.report });

function tapMultiple(keys, callback) {
  // no keys? we're done!
  if (keys.length==0) return callback();
  // tap a key
  kb.tap(keys[0], 0, function() { 
    // recurse with the remainder of the array
    tapMultiple(keys.slice(1), callback);
  });  
}

function sendCap() {
  tapMultiple([
    kb.KEY.A,kb.KEY.B,kb.KEY.C,
    kb.KEY.D,kb.KEY.E,kb.KEY.F,
    kb.KEY.G,kb.KEY.H,kb.KEY.I],
             function() {
    // we're done!
  });
}

// trigger btnPressed whenever the button is pressed
setWatch(sendCap, BTN, {edge:"rising",repeat:true,debounce:50})­;