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How do I enable the hosts command on my Fitbit Versa 4


Enabling the hosts command on your Fitbit Versa 4 involves using an unofficial method that requires setting an environment flag and using specific tools. This process is primarily for developers or those interested in customizing their device beyond standard capabilities. Here’s a step-by-step guide based on available information:

Step 1: Understand the Requirements

- The process involves using the `FITBIT_QA_COMMANDS` environment flag, which is typically used for debugging purposes.
- You will need to use a computer with access to the command line or terminal.
- Ensure you have the necessary permissions and tools installed on your computer.

Step 2: Set Up Your Environment

1. Install Necessary Tools: You will need to have Node.js and Yarn installed on your computer. These tools are used for managing and building applications.

2. Clone the Repository: Clone the GitHub repository that provides the unofficial Fitbit Versa 4 app setup. This repository contains scripts and configurations needed for sideloading apps and enabling developer features.

bash
   git clone https://github.com/cmengler/fitbit-app-versa4.git
   

3. Navigate to the App Directory: Move into the cloned repository directory.

bash
   cd fitbit-app-versa4/app
   

4. Install Dependencies: Install the required dependencies using Yarn.

bash
   yarn install
   

5. Build the App: Build the application using Yarn.

bash
   yarn build
   

Step 3: Enable Developer Bridge and QA Commands

1. Enable Developer Bridge on Your Watch:
- Connect your Versa 4 to a charger.
- Go to Settings > Developer Bridge.
- Toggle USB Debugging on.

2. Enable Developer Bridge on Your Phone:
- Open the Fitbit app.
- Access the Developer Menu.
- Toggle on Developer Bridge and wait for the "Waiting for Studio" status.

3. Set Environment Flags:
- Open a terminal or command prompt on your computer.
- Set the `FITBIT_QA_COMMANDS` environment flag to enable the hosts command.

bash
     export FITBIT_QA_COMMANDS=1
     

- Optionally, you can also set `FITBIT_DEVBRIDGE_DUMP=1` for debugging purposes.

bash
     export FITBIT_DEVBRIDGE_DUMP=1
     

Step 4: Connect and Verify

1. Connect Your Devices:
- Run the debug command to connect your watch and phone.

bash
     yarn debug
     

- Once connected, you should see a prompt like `fitbit$`.

2. Verify Hosts Command:
- At the `fitbit$` prompt, type `hosts` to verify that your watch and phone are recognized.

bash
     fitbit$ hosts
     

- You should see a list of available hosts, including your watch and phone.

3. Connect Hosts:
- Connect to your phone and device using the following commands:

bash
     fitbit$ connect phone
     fitbit$ connect device
     

Important Notes

- Use at Your Own Risk: This method is unofficial and provided for educational purposes. It may void your warranty or cause issues with your device.
- Developer Tools: Ensure you have the necessary developer tools installed and configured correctly.
- Environment Flags: Setting environment flags like `FITBIT_QA_COMMANDS` is typically used for debugging and testing purposes. Be cautious when using these flags, as they can expose your device to potential security risks.

This process allows you to enable the hosts command on your Fitbit Versa 4, but it requires careful handling and understanding of the risks involved.

Citations:
[1] https://github.com/cmengler/fitbit-app-versa4
[2] https://www.reddit.com/r/fitbit/comments/brr407/fitbit_versa_features_tips_tricks/
[3] https://community.fitbit.com/t5/Versa-4/Can-t-change-the-settings-on-my-Versa-4/td-p/5335522
[4] https://media.croma.com/image/upload/v1686496760/Croma%20Assets/Communication/Wearable%20Devices/User%20Manual/263858_User%20Manual.pdf
[5] https://www.youtube.com/watch?v=0Lt3MaGnp6k
[6] https://www.reddit.com/r/fitbit/comments/8cn6np/fitbit_versa_ignore_do_not_disturb/
[7] https://support.google.com/fitbit/answer/14229424?hl=en
[8] https://www.youtube.com/watch?v=S8NNYQfxsPA
[9] https://www.youtube.com/watch?v=_Qxo7QjSZDQ
[10] https://documents.4rgos.it/v1/static/1153729_R_D001