MMM-OralB / Bluetooth equipped toothbrush integration

timodejong95

Thanks I really appreciate that! Yeah sure I am willing to refactor it a bit, if needed, and make it a configurable option.
Again sorry for deleting the repo, I pushed wit the wrong git user (work one). I saw that you starred/forked it.

Can you show me the changes or make a PR?

The GATT is a bit bugged I am not sure why but the services are not resolving. I am trying to fix that and I think that after that the battery status should be that hard anymore.

timodejong95

This post is deleted!

lavolp3

I can’t PR to your new repo, so here’s the code from MMM-BluetoothDevices.js:

/*jshint esversion: 6 */
//'use strict';

Module.register('MMM-BluetoothDevices', {
  // Default module config.
  defaults: {
    name: 'raspberrypi',
    mode: 'le',
    hci: 'hci0',
    interfaceName: 'org.bluez.Adapter1',
    services: [
      { type: 'CurrentTimeService' },
    ],
    devices: [],
    layout: {
      title: {
        position: 'bottom',
        key: 'name',
      },
      data: {
        position: 'bottom',
        fields: [
          { key: 'mode', text: 'mode' },
        ],
      },
    },
    hideAfter: 10 * 60,
  },

  getStyles() {
    return ['MMM-BluetoothDevices.css'];
  },

  // Override dom generator.
  getDom() {
    const wrapper = document.createElement('div');
    wrapper.classList.add('toothbrushes');

    if (this.loading) {
      wrapper.innerHTML = 'Loading...';
      wrapper.className = 'light small';

      return wrapper;
    }

    const table = document.createElement('table');
    const row = document.createElement('tr');

    for (const deviceKey in this.devices) {
      const deviceType = this.devices[deviceKey].device.type;

      if (deviceType === 'OralBToothbrush') {
        row.appendChild(this.renderToothbrush(deviceKey));
      } else {
        throw new Error(`Unknown device type: ${deviceType}`);
      }
    }

    table.appendChild(row);
    wrapper.appendChild(table);

    return wrapper;
  },

  renderToothbrush(deviceKey) {
    const device = this.devices[deviceKey];
    const deviceTd = document.createElement('td');
    deviceTd.classList.add('toothbrush');
    deviceTd.style.textAlign = "center";

    const deviceCircle = document.createElement('div');
    deviceCircle.classList.add('toothbrush-circle-container');
    deviceCircle.classList.add(`toothbrush-circle-${device.data.state}`);

    const deviceCircleText = document.createElement('div');
    deviceCircleText.classList.add('toothbrush-circle-text');

    const deviceCircleSvg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
    deviceCircleSvg.classList.add('toothbrush-circle-ring');

    const deviceCircleSvgCircle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
    deviceCircleSvgCircle.classList.add('toothbrush-circle');
    deviceCircleSvgCircle.setAttribute('stroke-width', 15);
    deviceCircleSvgCircle.setAttribute('fill', 'transparent');
    deviceCircleSvgCircle.setAttribute('r', 52);
    deviceCircleSvgCircle.setAttribute('cx', 60);
    deviceCircleSvgCircle.setAttribute('cy', 60);

    deviceCircleSvg.append(deviceCircleSvgCircle);
    deviceCircle.append(deviceCircleSvg);
    deviceCircle.append(deviceCircleText);

    //const time = device.data.time > 120 ? 120 : device.data.time;
    const time = device.data.time;

    // initial start
    this.updateCircle(deviceCircleSvgCircle, deviceCircleText, time);

    if (device.data.state === 'running') {
      deviceTd.style.display = 'block';
      deviceCircleText.classList.add('bright');
      deviceCircleSvgCircle.setAttribute('stroke', '#0080fe');
      this.counters[deviceKey] = {
        time,
        interval: setInterval(() => {

          this.counters[deviceKey].time += 1;

          this.updateCircle(
            deviceCircleSvgCircle,
            deviceCircleText,
            this.counters[deviceKey].time
          );
        }, 1000),
      };
    } else {
      deviceCircleText.classList.remove("bright");
      deviceCircleSvgCircle.setAttribute('stroke', '#aaa');
      setInterval(() => {
        deviceTd.style.display = "none";
      }, this.config.hideAfter * 1000);
    }

    const deviceLabel = document.createElement('div');
    deviceLabel.classList.add('title');
    deviceLabel.classList.add('small');
    deviceLabel.innerText = device.device[this.config.layout.title.key];

    const dataContainer = document.createElement('div');
    dataContainer.classList.add('small');
    dataContainer.classList.add('light');
    for (const key in this.config.layout.data.fields) {
      const data = this.config.layout.data.fields[key];
      const field = document.createElement('div');
      field.innerText = `${data.key}: ${device.data[data.key]}`;
      dataContainer.appendChild(field);
    }

    if (this.config.layout.title.position === 'top') {
      deviceTd.appendChild(deviceLabel);
    }
    if (this.config.layout.data.position === 'top') {
      deviceTd.appendChild(dataContainer);
    }

    deviceTd.appendChild(deviceCircle);

    if (this.config.layout.title.position === 'bottom') {
      deviceTd.appendChild(deviceLabel);
    }
    if (this.config.layout.data.position === 'bottom') {
      deviceTd.appendChild(dataContainer);
    }

    return deviceTd;
  },

  updateCircle(deviceCircleSvgCircle, deviceCircleText, time) {
    var secs = time % 60;
    deviceCircleText.innerText = Math.floor(time / 60) + ":" + (secs < 10 ? "0" + secs : secs);

    const radius = parseInt(deviceCircleSvgCircle.getAttribute('r'));
    const circumference = radius * 2 * Math.PI;
    if (time > 120) { time = 120; }
    const percent = (100 / 120) * time;
    const offset = circumference - percent / 100 * circumference;
    deviceCircleSvgCircle.style.strokeDasharray = `${circumference} ${circumference}`;
    deviceCircleSvgCircle.style.strokeDashoffset = offset;
  },

  start() {
    Log.info(`Starting module: ${this.name}`);

    this.devices = {};
    this.counters = {};
    this.loading = true;

    this.sendSocketNotification('FETCH_TOOTHBRUSHES', this.config);
  },

  socketNotificationReceived(notification, payload) {
    if (notification === 'FETCH_TOOTHBRUSHES_RESULTS') {
      Log.info('MMM-Toothbrush: Got toothbrush results');
      this.devices = payload;

      for (const counterKey in this.counters) {
        const counter = this.counters[counterKey];
        clearInterval(counter.interval);
      }

      if (this.loading) {
        this.loading = false;
        this.updateDom(1000);
      } else {
        this.updateDom(0);
      }
    }
  },
});

it’s also in the develop branch of my module

timodejong95

@lavolp3 Thanks, I will have a look at that this weekend.

Also managed to connect to the services and characteristics. But how did you know the one you needed?

Because you only connecting to the 3th key in the services array and a hardcoded uuid for the characteristics. I am curious how you find the one you needed.

lavolp3

@timodejong95 I used this gitlab snippet. Don’t remember how I got there. I guess from the homeassistant forum which is also working on that.
For more follow-up see my post in this thread

When I use bluetoothctl on my RasPi I am getting lots of output form the brush recently. I’m not sure why exactly, maybe because my Pi is coupled with the brush.

Primary Service
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050
        a0f0ff20-5047-4d53-8208-4f72616c2d42
        Vendor specific
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0070
        a0f0ff2b-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0070/desc0072
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char006d
        a0f0ff2a-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char006d/desc006f
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char006a
        a0f0ff29-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char006a/desc006c
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0067
        a0f0ff28-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0067/desc0069
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0064
        a0f0ff27-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0064/desc0066
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0061
        a0f0ff26-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0061/desc0063
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char005e
        a0f0ff25-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char005e/desc0060
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char005b
        a0f0ff24-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char005b/desc005d
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0058
        a0f0ff23-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0058/desc005a
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0055
        a0f0ff22-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0055/desc0057
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0051
        a0f0ff21-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0051/desc0054
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0050/char0051/desc0053
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Primary Service
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e
        a0f0ff00-5047-4d53-8208-4f72616c2d42
        Vendor specific
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char004c
        a0f0ff0d-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char004c/desc004f
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char004c/desc004e
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0048
        a0f0ff0c-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0048/desc004b
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0048/desc004a
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0044
        a0f0ff0b-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0044/desc0047
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0044/desc0046
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0040
        a0f0ff0a-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0040/desc0043
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0040/desc0042
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char003c
        a0f0ff09-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char003c/desc003f
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char003c/desc003e
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0038
        a0f0ff08-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0038/desc003b
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0038/desc003a
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0034
        a0f0ff07-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0034/desc0037
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0034/desc0036
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0030
        a0f0ff06-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0030/desc0033
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0030/desc0032
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c
        a0f0ff05-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c/desc002f
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c/desc002e
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0028
        a0f0ff04-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0028/desc002b
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0028/desc002a
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0025
        a0f0ff03-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0025/desc0027
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0022
        a0f0ff02-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char0022/desc0024
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char001f
        a0f0ff01-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char001f/desc0021
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Primary Service
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010
        a0f0fff0-5047-4d53-8208-4f72616c2d42
        Vendor specific
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char001b
        a0f0fff4-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char001b/desc001d
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0018
        a0f0fff3-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0018/desc001a
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0015
        a0f0fff2-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0015/desc0017
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0011
        a0f0fff1-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0011/desc0014
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service0010/char0011/desc0013
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration
Primary Service
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service000c
        00001801-0000-1000-8000-00805f9b34fb
        Generic Attribute Profile
Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service000c/char000d
        00002a05-0000-1000-8000-00805f9b34fb
        Service Changed
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service000c/char000d/desc000f
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration

Do we have to look into one of these characteristics/desricptors for the value?

lavolp3

@lavolp3 Well according to the gitlab code we’re looking for this:

Characteristic
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c
        a0f0ff05-5047-4d53-8208-4f72616c2d42
        Vendor specific
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c/desc002f
        00002901-0000-1000-8000-00805f9b34fb
        Characteristic User Description
Descriptor
        /org/bluez/hci0/dev_58_7A_62_3F_63_80/service001e/char002c/desc002e
        00002902-0000-1000-8000-00805f9b34fb
        Client Characteristic Configuration

The characteristic is the one the referenced noble code is filtering for.

Now GO Timo!
Make brushing great again!

timodejong95

@lavolp3

Haha thanks man.

I have made some big changes, improved connecting devices, GATT service, characteristics and some more. I have also managed to get the battery value, but I have an issue: after around 15-30 seconds after connection successfully to the device the connection drops:

{"ServicesResolved":false,"Connected":false}

I haven’t figured out why this happens, all the normal data is still received. Only the battery status not, it needs to be connected. I haven’t push anything to the repo yet. First I want to look if I can get it working (fully).

Are you experiencing the same with noble or can you get the battery status after 30 seconds or 1 minute plus?

I keep you updated.

timodejong95

I have been debugging it and it seems that the devices is ‘just’ being disconnected:

HCI Event: Disconn Complete (0x05) plen 4
    status 0x00 handle 64 reason 0x13
    Reason: Remote User Terminated Connection

I do not know why :/

timodejong95

@lavolp3 Oke I have pushed some changes, see: https://github.com/timodejong95/MMM-BluetoothDevices. Don’t forget npm install.

I updated the configuration see docs. You need to add a track key to the device config with the value ‘battery’:

example:

devices: [
  { type: 'OralBToothbrush', name: 'oralb', mac: 'xxx', tracks: ['battery'], format: 'formatted' },
],

It’s still a bit buggy let me know what your experience is!

lavolp3

@timodejong95 No luck yet.
No Battery status to be seen and this error in the logs

0|mm       | [2020-04-20 01:21:08.432] [ERROR]  01:21:08 <error> (node:23220) UnhandledPromiseRejectionWarning: TypeError: Converting circular structure to JSON
0|mm       |     --> starting at object with constructor 'DBusObject'
0|mm       |     |     property 'proxy' -> object with constructor 'Object'
0|mm       |     |     property 'org.freedesktop.DBus.Introspectable' -> object with constructor 'DBusInterface'
0|mm       |     --- property '$parent' closes the circle
0|mm       |     at JSON.stringify (<anonymous>)
0|mm       |     at /home/pi/MagicMirror/modules/MMM-BluetoothDevices/src/index.js:24:25
0|mm       |     at processTicksAndRejections (internal/process/task_queues.js:89:5) (/home/pi/MagicMirror/internal/process/warning.js:27 writeOut)
0|mm       | [2020-04-20 01:21:08.435] [ERROR]  01:21:08 <error> (node:23220) UnhandledPromiseRejectionWarning: TypeError: Converting circular structure to JSON
0|mm       |     --> starting at object with constructor 'DBusObject'
0|mm       |     |     property 'proxy' -> object with constructor 'Object'
0|mm       |     |     property 'org.freedesktop.DBus.Introspectable' -> object with constructor 'DBusInterface'
0|mm       |     --- property '$parent' closes the circle
0|mm       |     at JSON.stringify (<anonymous>)
0|mm       |     at /home/pi/MagicMirror/modules/MMM-BluetoothDevices/src/index.js:24:25
0|mm       |     at processTicksAndRejections (internal/process/task_queues.js:89:5) (/home/pi/MagicMirror/internal/process/warning.js:27 writeOut)