kreativmonkey

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• BLE scan and advertising parallel?

  @kreativmonkey started

  • 4 comments
  • 1,017 views

  @Gordon replied
• BLE scan and advertising parallel?

  in Puck.js, Pixl.js and MDBT42 • 3 years, 1 month

  

  @Gordon yes that off course fixed the issue i have ;-). I've changed my code over the day it works like aspactad.

  let started = false;  // if scanning is startet
  var intervalLed;
  var selfid = NRF.getAddress().substr(12,5).replace(':',''); // get the last 5 digits of ble mac as id
  var scanIds = [ "5c5b", "69f0", "6d31" ];  // list of devices to scan for
  var data = new Uint8Array(scanIds.length); // define data as zero
  
  // Default ble settings
  const be = {
        name: "BLE "+ selfid, // The name of the device
        showName: true, // include full name, or nothing
        discoverable: true, // general discoverable, or limited - default is limited
        connectable: true, // whether device is connectable - default is true      
        scannable : true, // whether device can be scanned for scan response packets - default is true
        interval: 375, // Advertising interval in msec, between 20 and 10000 (default is 375ms)
        manufacturer: 0x0590, // IF sending manufacturer data, this is the manufacturer ID
      };
  
  // update Advertising by the current received rssi
  function updateAdvertising(device) {
    // our data - all 0 for nothing, 
    // or RSSI + 6 bytes address
    var id = device.id.substr(12, 5).replace(':','');
  
    if (!scanIds.includes(id)) return;
  
    data[scanIds.indexOf(id)] = device.rssi * -1; // converte to positive integer
  
    NRF.setAdvertising({}, {
      showName: false,
      connectable: false,
      scannable: false,
      interval: 100,
      manufacturer: be.manufacturer,
      manufacturerData: data
    });
    
    console.log("Found Device: " + id);
  }
  
  function setDefault() {
    // Initiale Advertising
    NRF.setAdvertising({}, {
      name: be.name,
      showName: be.showName,
      discoverable: be.discoverable,
      connactable: be.connectable,
      scannable: be.scannable,
      interval: be.interval,
      manufacturer: be.manufacturer,
      manufacturerData: data
    });
  }
  
  Pin.prototype.flash = function(period) { 
    var pin = this;
    digitalWrite(pin, true);
    setTimeout(function() {
      digitalWrite(pin, false);
    }, 100);
  };
  
  // Setting up defaults
  setDefault();
  
  // Watch if BTN was pressed
  setWatch(function(){
    console.log("Device: " + be.name);
    
    if (started) {
      console.log("Stop Scanning");
      NRF.setScan();  // Stop scanning on BLE devices
      clearInterval(intervalLed); // Stop Led from blinking
      started = false; // switch device status
      LED1.flash(); // Show stop with red LED
      setDefault();
    } else {
      console.log("Start Scanning");
      started = true;
      LED2.flash();  // Show start with green LED
      NRF.setScan(updateAdvertising); // Start scanning for BLE devices
      intervalLed = setInterval('LED2.flash();', 10000); // Flash the green led to visualise scanning mode
    }
  }, BTN, {edge:"rising", repeat:1, debounce:20});
  

  Now i have two new problems. First of all, after starting and stopping, i can't connect to the Puck-js scince i'm pull out the battery and plug it in again.

  ~~The second problem is the advertising interval. If i change the interval to somthing under 100ms i don't reseive any packages from the device. ~~

  [Edit] Answere for the second Question:
  NOTE: Non-connectable advertising can't have an advertising interval less than 100ms according to the BLE spec.

• Puck.js Bluetooth 5 Support?

  in Puck.js, Pixl.js and MDBT42 • 3 years, 1 month

  

  Hi @Gordon,

  i bought Puck-js while they are BLE 5 ready but now i see it's still on BLE 4.2. 3 years ago scince your last post. Is there any Change?

• BLE scan and advertising parallel?

  in Puck.js, Pixl.js and MDBT42 • 3 years, 1 month

  

  Is it possible to scan and advertise at the same time? I would like to do a setup with 3 beacon. Each beacon should scan for the other two beacons and save the current rssi. In the next Advertising package the beacon should send the last received rssi from the other two beacons. I'm new on programming with JavaScript. My current Codebase shows this:

  const be = {
        name: "BLE-Beacon B", // The name of the device
        showName: true, // include full name, or nothing
        discoverable: true, // general discoverable, or limited - default is limited
        connectable: true, // whether device is connectable - default is true      
        scannable : false, // whether device can be scanned for scan response packets - default is true
        interval: 300, // Advertising interval in msec, between 20 and 10000 (default is 375ms)
        manufacturer: 0x0590, // IF sending manufacturer data, this is the manufacturer ID
      };
  
  var deviceA = 0;
  var deviceB = 0;
  var deviceC = 0;
  
  // Start scanning
  started = true;
  logging = true;
  
  // scanning for the devices
  function scanDevice(d) {  
    let modified = false;
      
    // witch device is scanned
    // change the value
    switch (d.name) {
        case "BLE-Beacon A":
            modified = (deviceA !== d.rssi);
            deviceA = d.rssi;
            break;
        case "BLE-Beacon B":
            modified = (deviceB !== d.rssi);
            deviceB = d.rssi;
            break;
        case "BLE-Beacon C":
            modified = (deviceC !== d.rssi);
            deviceC = d.rssi;
            break;
    }
    
    // if value was modified setAdvertising to new Value
    if(modified){
      NRF.setAdvertising({
        0x180F: [deviceA]
        }, {
              name: be.name,
              manufacturer: be.manufacturer,
              interval: be.interval,
              manufacturerData: ["A", deviceA, "B", deviceB, "C", deviceC]
          });
    } else {
      console.log("nothing modified");
    }
    
  }
  
  // Initiales Scanning
  NRF.setScan(scanDevice, {filters: [{namePrefix:"BLE-Locate"}] });
  
  // Initiales Advertising
  NRF.setAdvertising({}, {
              name: be.name,
              manufacturer: be.manufacturer,
              interval: be.interval,
              manufacturerData: ["A", deviceA, "B", deviceB, "C", deviceC]
          });
  
  // Watch if BTN was pressed
  setWatch(function(){
   console. log("Device: " + be.name);
    
    if (started) {
      NRF.setScan();
      started = false;
      console.log("Stop Scanning");
    } else {
      NRF.setScan(scanDevice, {filters: [{namePrefix:"BLE-Locate"}] });
      started = true;
      console.log("Start Scanning");
    }
  }, BTN, {edge:"rising", repeat:1, debounce:20});