Puck.JS connection to MDBT42Q and simple click function

Hi!

@Robin put up a good link for detecting double-clicks. While it's not that hard, it's trivial to detect long vs short clicks, so you could always just do that?

I reckon the bluetooth flag tutorial you found is a good place to start. The initial example (using UART) uses ble_simple_uart - which abstracts away so much that you can't connect separately.

However you could just use the ble_uart module referenced at https://www.espruino.com/BLE+UART

So the receiver stays exactly as-is on http://www.espruino.com/BLE+Communications#receiver-bluetooth-peripheral-device-

Then for the transmitter

var log = print;// or function(){} to avoid printing anything

var uart;
function connect() {
  log("Searching for device...");
  NRF.requestDevice({ filters: [{ namePrefix: 'MDBT42Q' }] }).then(function(device) {
    log("Connecting...");
    device.on('gattserverdisconnected', function() {
      log("Disconnected");
      uart = undefined;
      setTimeout(connect,100);
    });
    return require("ble_uart").connect(device);
  }).then(function(u) {
    log("Connected");    
    uart = u;
    uart.write("\x03"); // send ctrl-c to clear anything on the input line
  }).catch(function(e) {
    log("Error: "+e);
    setTimeout(connect,100);
  });
}

function flag(e) {
  var l = e.time-e.lastTime;
  log("Button press length",l,(l>0.3)?"long":"short");
  log("Sending command");
  if (!uart) {
    log("Not connected!");
    return;
  }
  uart.write("digitalPulse(LED,1,10);\n");
}

// When button pressed
setWatch(flag, BTN, {repeat:true, edge:"falling"});
// start connecting...
connect();

The page with the flag example had another option too (using custom characteristics): http://www.espruino.com/BLE+Communications#sending-commands-custom-service-

Working with that is basically the same - you just use device.gatt.connect() rather than require("ble_uart").connect(device)