USB HID Support on Pico!

Yes, it can be zero - it's just whether buttons are pressed or not. I'll put definitions in the modules, but it's 1=left, 2=right, 4=middle - a bit like dealing with low-level GUI events tends to be :)

I think at some point the modules will need a bit of tidying - for instance making sure you can actually print a line of text to the Keyboard.

As a fun aside, you can now do something like this:

var kb = require("USBKeyboard");

var data = [];

setInterval(function() {
  if (data.length>=40) data = data.slice(-39);
  data.push(E.getTemperature());
}, 1000);

function outputData() {
  var i = 0;
  function outputLine() {
    if (i>=data.length) return;
    var s = data[i++].toFixed(2)+",\n";
    kb.type(s, outputLine);
  }
  outputLine();
}

setWatch(outputData, BTN, {debounce:100,repeat:true, edge:"rising"});

I'll post a link to the latest version in a bit