jeffmer

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• ATS-25 Radio programmed with Espruino

  @jeffmer started

  • 11 comments
  • 1,446 views

  @Gordon replied
• ATS-25 Radio programmed with Espruino

  in Projects • 2 months, 1 week

  

  Yet another radio running Espruino, this one is also based on an ESp32 controlling the SI4732 radio ic. It has a ST7789V tft display with no touch screen so everything is controlled by the rotary controller.

  https://youtu.be/MqkW5XDKNMg
  
  

• Rotary Encoder Bluetooth HID

  @jeffmer started

  • 4 comments
  • 247 views

  @Gordon replied
• HID integration broken on 2v15?

  in Puck.js, Pixl.js and MDBT42 • 3 months

  

  In developing the Rotary Encoder as mouse wheel, I tested the Espruino mouse example with the latest 2v15 release for Puck.js. It worked with no problem on Linux and IOS although I had to clear out some old pairing data by doing a complete reset of the Puck.

• Rotary Encoder Bluetooth HID

  in Projects • 3 months

  

  Very happy for you to put it on Espruino.com as an example - I would be honoured!

• SWD protocol - talk to BangleJS 2 over cable

  in Projects • 3 months, 1 week

  

  Thats very neat -will it be fast enough to use for loading code into flash?

• Rotary Encoder Bluetooth HID

  in Projects • 3 months, 1 week

  

  This project was driven by the inconvenience of using SDR (Software Defined Radio) programs without having an explicit physical tuning knob to adjust frequency. Subsequently, I have found it also useful for scrolling with tablets.

  The implementation uses an Espruino Puck.js and a rotary encoder as shown below in the breadboard prototype and the final device.

  

  Connections are (Encoder -> Puck): GND -> GND, SW -> D28, ENCODER -> D29,D30.

  The program below presents the Rotary Encoder as the middle wheel and button of a bluetooth mouse.

  function createEncoder(pinA,pinB){
    pinMode(pinA,"input_pullup");
    pinMode(pinB,"input_pullup"); 
    var a0=pinA.read(), c0=pinB.read(), incr0 =0, second=false;
    var OBJ = {};
  
    function handler () {
      var a = pinA.read();
      var b = pinB.read();
      if (a != a0) {              // A changed
        a0 = a;
        if (b != c0) {
          c0 = b;
          var incr = (a == b)?1:-1;
          if (incr!=incr0 || !second) OBJ.emit("change",incr);
          incr0=incr; second = !second;
        }
      }
    }
    setWatch(handler,pinA,{repeat:true,edge:­"both"});
    return OBJ;
  }
    
  function createSwitch(pinA){
    pinMode(pinA,"input_pullup");
    var OBJ = {};
    
    function handler(ns){
        OBJ.emit("change",!ns.state);
    }
    setWatch(handler,pinA,{repeat:true,edge:­"both",debounce:25});
    return OBJ;
  }
  
  //HID report for Mouse device
  var report = new Uint8Array([
    0x05, 0x01, 0x09, 0x02, 0xA1, 0x01,
    0x09, 0x01, 0xA1, 0x00, 0x05, 0x09,
    0x19, 0x01, 0x29, 0x03, 0x15, 0x00,
    0x25, 0x01, 0x95, 0x03, 0x75, 0x01,
    0x81, 0x02, 0x95, 0x01, 0x75, 0x05,
    0x81, 0x01, 0x05, 0x01, 0x09, 0x30,
    0x09, 0x31, 0x09, 0x38, 0x15, 0x81, 
    0x25, 0x7F, 0x75, 0x08, 0x95, 0x03,   
    0x81, 0x06, 0xC0, 0x09, 0x3c, 0x05,
    0xff, 0x09, 0x01, 0x15, 0x00, 0x25,
    0x01, 0x75, 0x01, 0x95, 0x02, 0xb1,
    0x22, 0x75, 0x06, 0x95, 0x01, 0xb1,
    0x01,   0xc0 ]
  );
  NRF.setServices(undefined, { hid :report });
  
  var ROT = createEncoder(D29,D30);
  ROT.on("change",(wheel)=>NRF.sendHIDRepo­rt([0,0,0,wheel,0,0,0,0],()=>{}));
  
  var SW = createSwitch(D28);
  SW.on("change",(sw)=>NRF.sendHIDReport([­sw?1:0,0,0,0,0,0,0,0],()=>{}));
  

  The encoder handler is adapted from here and I found it worked much more reliably than the Espruino encoder module. In addition the following code allows the device to switch from HID to normal Espruino mode for connection to the WebIDE i.e. hold down the encoder switch until the Puck flashes GREEN. On reboot or reset, it will go into HID mode by default and flash BLUE. On connection, there is a BlUE flash and a RED flash on disconnection.

  pinMode(D28,"input_pullup");
  E.kickWatchdog();
  setInterval(()=>{
    if(D28.read()) E.kickWatchdog();
  },5000);
  E.enableWatchdog(10, false);
  
  function flash(pin){
      pin.set();
      setTimeout(()=>{pin.reset();},500);
  }
  function delayms(d) {
      var t = getTime()+d/1000; 
      while(getTime()<t);
  }
  var STOR = require("Storage");
  
  NRF.on("connect",()=>{flash(LED3);});
  NRF.on("disconnect",()=>{flash(LED1);});­
  
  delayms(2000);
  
  if (D28.read()){
    flash(LED3);
    if (STOR.read("main.js")) eval(STOR.read("main.js"));
  } else {
    flash(LED2);
  }
  

• G5 smartwatch with 454x454 AMOLED display

  @jeffmer started

  • 7 comments
  • 1,009 views

  @Serj replied
• G5 smartwatch with 454x454 AMOLED display

  in Porting to new Devices • 5 months, 2 weeks

  

  That looks interesting - did you develop an Espruino driver for the E-paper screen?

• ATS-25 Radio programmed with Espruino

  in Projects • 5 months, 2 weeks

  

  There is enough space, however, all the signal processing is done by the SI4732 chip so the audio output goes straight to an amplifier. The ESP32 controls the SI4732 via I2C and does not get access to the audio output so sadly without a hardware mod, you cannot do things like Morse decoding which would be neat.