Check if Puck is connected with MDBT (Bluetooth)

[espruino-discuss]

Posted at 2021-02-23 by psc1988

Hi Gordon,

how I can implement the NRF.on("connect") service to check, if there is a bluetooth device connected or not.

I just want to send signals from Puck to MDBT when they are connected.
I worked with a variable "connected" and set it to true or false.

I have to setWatch functions with the Puck button for rising and falling. When I connect and disconnect it via the Puck button all is working.

But now I removed the battery from the MDBT and the Puck haven´t detected it as disconnected.

var log = print;
var uart;
var status = 0;
var l;
var t;
var counter = 1;
var connected = false;
var kb = require("ble_hid_keyboard");
NRF.setServices(undefined, { hid : kb.report }); 




///Mode Flashing


     setWatch(function(c) {

       
       
     if (connected == true) {

       
     setTimeout(function () {

     if (counter == 1){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D19, 1);\n");
     }

     if (counter == 2){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D17, 1);\n");
        }

     if (counter == 3){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D15, 1);\n");
        }

     if (counter == 4){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D18, 1);\n");
        }

     if (counter == 5){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D16, 1);\n");
        }

     if (counter == 6){clearInterval(); digitalWrite (LED2, 1);
     uart.write("digitalWrite(LED2,1), digitalWrite(D14, 1);\n");
        }
     }, 1000);
     }
     }, BTN, { repeat: true, edge: 'rising' });


     setWatch(function(c) {
 
       
       if (connected == false) {
    kb.tap(kb.KEY.ENTER, 0);
   }   
       
       
     if (connected == true) {

     var l = c.time-c.lastTime;  

     if ((c.time-c.lastTime > 0.3) && (c.time-c.lastTime < 1.0)) 
     {counter = counter + 1;}

     if (counter > 6)
     {counter = 1;}


      log("Counter:");
      log(counter); 

      if (counter == 1)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, 50)}", 5000);}

      if (counter == 2)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, [50, 300, 50])}", 5000);}

      if (counter == 3)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, [50, 300, 50,  300, 50])}", 5000);}

      if (counter == 4)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, [50, 300, 50,  300, 50,  300, 50])}", 5000);}

      if (counter == 5)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, [50, 300, 50,  300, 50,  300, 50,  300, 50])}",         5000);}

      if (counter == 6)
      {clearInterval();
      setInterval("{digitalPulse (LED2, 1, [50, 300, 50,  300, 50,  300, 50,  300, 50,           300, 50])}", 5000);}

     if (counter == 1){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D19, 0);\n");
     }

     if (counter == 2){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D17,0);\n");
        }

     if (counter == 3){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D15, 0);\n");
        }

     if (counter == 4){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D18, 0);\n");
        }

     if (counter == 5){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D16, 0);\n");
        }

     if (counter == 6){digitalWrite (LED2, 0);
     uart.write("digitalWrite(LED2,0), digitalWrite(D14, 0);\n");
        } 
     }
          }, BTN, { repeat: true, edge: 'falling' });

//BLE Connect

    function flag(e) {
  
    var l = e.time-e.lastTime;  
    if ((e.time-e.lastTime < 0.3) && (connected == false)){
    log("Sending command");
    log("Searching for device...");
    NRF.requestDevice({ filters: [{ namePrefix: 'MDBT42Q' }] }).then(function(device) {
    log("Connecting...");
    device.on('gattserverdisconnected', function() {
    });
    return require("ble_uart").connect(device);
    }).then(function(u) {
    log("Connected");
    digitalPulse(LED3, 1, 300);
    uart = u;
    connected = true;
      counter = 1;
    });}
      
///BLE Disconnect
  
    
     setTimeout(function(device) {
     
     if (connected == true){ 
     uart.disconnect();
     log("Disconnected");
     connected = false;
     counter = 1;
     digitalPulse (LED3, 1, [50, 300, 50]);
     clearInterval();
     }
     }, 60000);
     
    if ((e.time - e.lastTime < 0.3) && (connected == true) ){
    setTimeout(function(device) {
    uart.disconnect();
    log("Disconnected");
    connected = false;
                  
    if (connected == false){
    clearInterval();
    digitalPulse (LED3, 1, [50, 300, 50]);
    digitalWrite(D14, 0);
   ...

Best regards

[gfwilliams]

Posted at 2021-02-23 by @gfwilliams

But now I removed the battery from the MDBT and the Puck haven´t detected it as disconnected.

How long did you leave it? There's a bit of a timeout in the connection to allow for radio interference, so it won't log it as soon as the connection is gone - but it should after maybe 10 seconds.

[espruino-discuss]

Posted at 2021-02-23 by psc1988

Let me check. Thanks for the info.

[espruino-discuss]

Posted at 2021-02-23 by psc1988

Cool, that works. Around 30 Seconds but thats ok for me!

Thanks Gordon!