ThePlayShed

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• Bluetooth Lego Train Remote

  @ThePlayShed started

  • 7 comments
  • 4,522 views

  @allObjects replied
• Bluetooth Lego Train Remote

  in Projects • 4 years, 6 months

  

  Thanks I've changed it to javascript

  the direction works between the number so grater that 100 but less that 200 set this speed

  ie

  if (dir_val < 200 && dir_val > 100) {
            const sendvalue = new Uint8Array([0x08, 0x00, 0x81, 0x00, 0x01, 0x51, 0x00, 0xce]);
    }
  

• Bluetooth Lego Train Remote

  in Projects • 4 years, 6 months

  

  Hi All

  A while ago i promised i would write up some info about a toy I made my kids for Christmas, It's a bluetooth remote that controls a lego duplo train. It works on a MDBT42Q coding in Espruino. I finally got round to doing it on instructables

  https://www.instructables.com/id/Wooden-Bluetooth-Remote-for-Lego-Duplo-Train/

  Any feedback or question would very welcomed I've also entered in to toy and games contest so any votes would be very much appreciated

  Once again thanks for all the help via this forum when I was making project

  Many Thanks

  James

• Modules - what am I doing wrong

  in General • 4 years, 12 months

  

  Sorry for late rely, yes I ditched the NRF.nfcSend, and used characteristic.writeValue, I will get my code together and try and write up brief tutorial

• Modules - what am I doing wrong

  in General • 5 years

  

  Thanks Robin, that eventually worked however i realise i was missing a step and had to send a two different commands to make it work.

  I managed to get me remote made in time for christmas so thank you all for you help, here a video of my remote in action

  https://www.instagram.com/p/B6inY2XgasT/?igshid=16amjui8jcves

  I hope you all had great a christmas

• Modules - what am I doing wrong

  in General • 5 years, 1 month

  

  Thanks for replying

  unfortantly it does like Array.from unless is need to done a slight different way in espruino

  Uncaught Error: Function "from" not found!
  at line 7 col 19
  var myArr = Array.from("ABCDEFG");

• Modules - what am I doing wrong

  in General • 5 years, 1 month

  

  Sorry To keep asking,

  I am seem to making some progress using a paired back node script and now rewriting in to use on the espruino, however I am stuck finding a way of making 'Buffer.from' working, Is there espruino equivalent ?

  I am looking to run this line

  const sounddata = Buffer.from([0x08, 0x00, 0x81, 0x01, 0x11, 0x51, 0x01, 0x05]);
  

• Modules - what am I doing wrong

  in General • 5 years, 1 month

  

  Thanks For have a look Robin is this a better layout ?

  var devices;
  var gatt;
  var DevName="e0:7d:ea:0c:03:29";
  var serviceUUID="00001623-1212-efde-1623-785feabcd123";
  var characteristicUUID="00001624-1212-efde-1623-785feabcd123";
  var MessageToSend=[0x81, 0x00, 0x11, 0x51, 0x00, 0x64];
  pinMode(D15, 'input_pulldown');
  global.LED2=D2;
  
  NRF.connect("e0:7d:ea:0c:03:29").then(function(g) {
    console.log("Starting connecting");
    gatt = g;
    return gatt.getPrimaryService("00001623-1212-efde-1623-785feabcd123");
  }).then(function(service) {
    return service.getCharacteristic("00001624-1212-efde-1623-785feabcd123");
  }).then(function(characteristic) {
    return characteristic.writeValue(MessageToSend);
  }).then(function() {
    //gatt.disconnect();
    console.log("Done!");
  });
  
  function send_message() {
    console.log("Moving Train");
    NRF.nfcSend(new Uint8Array([0x81, 0x00, 0x11, 0x51, 0x00, 0x64]));
  }
  
  function train_disconnect() {
    console.log("Disconnecting");
    gatt.disconnect();
  }
  
  setInterval(function() {
    digitalWrite(LED2, digitalRead(D15));
    if (digitalRead(D15) == 1) {
      send_message();
    }
    console.log("Button pressed", digitalRead(D15));
  }, 300);
  

• Modules - what am I doing wrong

  in General • 5 years, 1 month

  

  Hi All

  Thanks allobjects that helped but my progress is still quite slow, i have managed to connect to the train and disconnect but can't work out the best way to send the buffer. I am still trying to get my head around javascript so maybe missing something quite obvious

  here's my current code

  var devices;
  var gatt;
  var DevName="e0:7d:ea:0c:03:29";
  var serviceUUID="00001623-1212-efde-1623-785feabcd123";
  var characteristicUUID="00001624-1212-efde-1623-785feabcd123";
  var MessageToSend=[0x81, 0x00, 0x11, 0x51, 0x00, 0x64];
  pinMode(D15, 'input_pulldown');
  global.LED2=D2;

  NRF.connect("e0:7d:ea:0c:03:29").then(function(g) {
  console.log("Starting connecting");
  gatt = g;
  return gatt.getPrimaryService("00001623-1212-efde-1623-785feabcd123");
  }).then(function(service) {
  return service.getCharacteristic("00001624-1212-efde-1623-785feabcd123");
  }).then(function(characteristic) {
  return characteristic.writeValue(MessageToSend);
  }).then(function() {
  //gatt.disconnect();
  console.log("Done!");
  });

  function send_message() {
  console.log("Moving Train");
  NRF.nfcSend(new Uint8Array([0x81, 0x00, 0x11, 0x51, 0x00, 0x64]));
  }

  function train_disconnect() {
  console.log("Disconnecting");
  gatt.disconnect();
  }

  setInterval(function() {
  digitalWrite(LED2, digitalRead(D15));
  if (digitalRead(D15) == 1) {

  send_message();
  

  }
  console.log("Button pressed", digitalRead(D15));
  }, 300);

  any advice would be greatly appreciated

  Cheers

  James

• Modules - what am I doing wrong

  in General • 5 years, 1 month

  

  Thanks the lego link very helpful

  Yes it looks like the message it send contains the 16 bytes in hex followed buffer string that appears to vary in length. ie Buffer 05 00 01 02 02 or 0a 00 41 00 00 01 00 00 00 01

  sorry didn't realise i was using two account the previous message was sent from my work.