Successfully Migrating Dyson Pure Cool Link to Local MQTT Control

General
1

After struggling with the Dyson API breaking my setup multiple times, I decided to take matters into my own hands and migrate my Dyson Pure Cool Link to use local MQTT control. I wanted to share my journey and solution in case anyone else is facing similar issues.

The Challenge
For a while, I relied on the Dyson component in Home Assistant to control my fan. However, recent updates broke the integration, leaving me without control over my device. This wasn’t the first time I faced this issue, and I knew I needed a more reliable solution.

The Solution
After some research, I discovered that the Dyson Pure Cool Link supports local MQTT communication without needing the Dyson cloud. This was exactly what I needed! Here’s how I set it up:

  1. Connecting to the Fan

    • The fan uses a specific SSID and password, which are printed on a sticker inside the device. If your fan doesn’t have this sticker, you can use Wireshark to sniff the password.

  2. MQTT Configuration

    • I connected to the fan on port 1883 using the SSID as the username and the hashed password from the sticker.

    • I used a Python script to convert the password to the required hash format:
      python
      ‘’’ Transfers the password from the sticker to the needed hash. ‘’’
      import base64
      import hashlib

      Ask for the password

      pwd = input(“Product WiFi Password (e.g.: adgjsfhk):”)

      Transfer password to hash version

      hash = hashlib.sha512()
      hash.update(pwd.encode(‘utf-8’))
      pwd_hash = base64.b64encode(hash.digest()).decode(‘utf-8’)

      Print out password hash

      print(pwd_hash)

  3. MQTT Commands

    • The fan responds to several commands via MQTT. Here are the key commands:
      • Power: FAN or OFF
      • Oscillation: ON or OFF
      • Speed: Values from 0001 to 0010
      • Night Mode: ON or OFF

  4. Integration with Node-RED

    • I used Node-RED to create a seamless integration. Here’s a snippet of the function node I created:
      javascript
      var now = new Date();
      console.log(now.toUTCString());

      var oson = msg.osc
      var speed = msg.speed
      var night = msg.night
      var power = msg.power

      msg.payload = {
      “msg”: “STATE-SET”,
      “time”: now,
      “data”: {
      “oson”: oson,
      “fnsp”: speed,
      “nmod”: night,
      “fmod”: power
      }
      }

      return msg;

  5. Automation and Timer

    • I set up a timer to turn off the fan after a certain period. This involved creating input booleans for power, oscillation, and night mode, as well as input numbers for speed and timer management.

Conclusion
This setup has been a game-changer for me. I no longer rely on Dyson’s cloud services, and I have full control over my fan through MQTT. It’s been running smoothly for months now, and I’ve had no issues with the integration.

I hope this guide helps anyone else looking to take control of their Dyson devices. If you have any questions or need further clarification, feel free to ask! Happy automating! :tada: