How to Connect MRCOOL One Cloud: A Comprehensive DIY Guide

The MRCOOL One Cloud is a powerful cloud-based control system that allows you to manage your MRCOOL DIY Ductless Mini Split system remotely, no matter where you are. Whether you’re at work, on vacation, or just relaxing at home, the MRCOOL One Cloud gives you the ability to monitor and control your home’s temperature, humidity, and air quality with just a few taps on your smartphone. In this comprehensive guide, we’ll walk you through the step-by-step process of connecting your MRCOOL One Cloud and unlocking its full potential.

Preparing Your MRCOOL DIY Ductless Mini Split

  1. Install the Smart Kit: The first step is to install the Smart Kit that comes with your MRCOOL DIY Ductless Mini Split. This kit includes a USB adapter that you’ll need to connect your unit to your home’s Wi-Fi network. Locate the reserve port on the indoor unit, remove the cap, and insert the USB adapter.
  2. Attach the QR Sticker: The Smart Kit also includes a QR sticker that you’ll need to attach to the side panel of your indoor unit. This sticker will be used to quickly connect your unit to the MRCOOL app on your smartphone.
  3. Ensure Internet Connectivity: Before you begin the setup process, make sure that your home’s Wi-Fi router is connected to the internet and that your smartphone is also connected to the same network.

Entering Wi-Fi Setup Mode

how to connect MRCOOL one cloud

  1. Power Cycle the Unit: Turn off your MRCOOL DIY Ductless Mini Split, then turn it back on.
  2. Activate Wi-Fi Setup Mode: Within 3 minutes of powering on the unit, press the LED button on the indoor unit 7 times. This will cause the letters “AP” to appear on the display, indicating that the unit has entered Wi-Fi setup mode.

Connecting to the MRCOOL App

  1. Download and Install the MRCOOL App: Search for the “MRCOOL” app on the App Store (iOS) or Google Play Store (Android) and install it on your smartphone.
  2. Create an Account: Open the MRCOOL app and create a new account by following the on-screen instructions.
  3. Add Your Device: Tap the “Add Device” button in the app and scan the QR code on the sticker you attached to your indoor unit.
  4. Connect to Your Wi-Fi Network: Select your home’s Wi-Fi network from the list and enter the password.
  5. Confirm Connection: Once the connection process is complete, you should see your MRCOOL DIY Ductless Mini Split listed in the app, indicating that it has been successfully connected to the MRCOOL One Cloud.

Advanced Customization and Integration

The MRCOOL DIY Ductless Mini Split is a highly versatile system that can be integrated with a variety of smart home platforms and automation systems. One popular option is to use ESPHome, an open-source framework that allows you to create custom firmware for your MRCOOL unit.

To leverage ESPHome, you’ll need to order a USB adapter specifically designed for this purpose. Once you have the adapter, you can follow the tutorials and guides available online to remove the Chinese Wi-Fi from your mini-split and replace it with a custom ESPHome-based firmware. This will give you more advanced control and customization options for your MRCOOL One Cloud, including the ability to integrate it with Home Assistant, Amazon Alexa, Google Assistant, and other smart home platforms.

Troubleshooting and Support

If you encounter any issues during the setup process or while using your MRCOOL One Cloud, there are several resources available to help you:

  1. MRCOOL Support: The MRCOOL website ( offers a comprehensive support section with FAQs, user manuals, and contact information for their customer service team.
  2. Online Forums: Websites like the Home Assistant Community ( have active discussions and troubleshooting threads related to MRCOOL mini-split integration.
  3. YouTube Tutorials: There are numerous YouTube videos that provide step-by-step guides on how to set up and troubleshoot the MRCOOL One Cloud, such as How to Set Up Wifi for MR COOL DIY Ductless Mini Split and How to Set Up the MrCool SmartHVAC App (2021 Update).

By following the steps outlined in this guide and leveraging the available resources, you’ll be able to seamlessly connect your MRCOOL DIY Ductless Mini Split to the MRCOOL One Cloud and take full control of your home’s climate, no matter where you are.


  1. How to Set Up Wifi for MR COOL DIY Ductless Mini Split – YouTube
  2. How to Set Up Wifi for MR COOL DIY Ductless Mini Split Video – Webstaurantstore
  3. How to Set Up the MrCool SmartHVAC App (2021 Update) – YouTube
  4. How to Set Up Wifi for MRCOOL DIY Ductless Mini Split – iWAE
  5. MrCool Mini-Split Integration – Home Assistant Community