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How do I verify that the hosts command is working on my Fitbit Versa 4


To verify that the `hosts` command is working on your Fitbit Versa 4, you need to follow a series of steps that involve setting up your device for developer mode and using the Fitbit SDK tools. Here's a detailed guide:

Step 1: Enable Developer Bridge

1. Open the Fitbit App: On your phone, open the Fitbit app and navigate to the Developer Menu. This might require you to tap on your profile icon and then look for developer options.
2. Toggle Developer Bridge: In the Developer Menu, toggle on the Developer Bridge option. Wait until it shows a "Waiting for Studio" status.

Step 2: Enable USB Debugging on Versa 4

1. Connect Versa 4 to Charger: Plug your Versa 4 into a charger.
2. Access Settings: On your Versa 4, go to Settings.
3. Enable USB Debugging: Navigate to Developer Bridge and toggle USB Debugging on.

Step 3: Set Environment Flags

1. Open Terminal: On your computer, open a terminal or command prompt.
2. Set FITBIT_QA_COMMANDS Flag: Type the following command to enable the `hosts` command: 
bash
   export FITBIT_QA_COMMANDS=1

Optionally, you can also set the `FITBIT_DEVBRIDGE_DUMP` flag for debugging purposes: 
bash
   export FITBIT_DEVBRIDGE_DUMP=1

Step 4: Connect Devices and Verify Hosts

1. Navigate to App Directory: Go to the directory where your Fitbit app project is located.
2. Run Debug Command: Execute the following command to start the debugging session: 
bash
   yarn debug

You may be prompted to log in to your Fitbit developer account.
3. Verify Hosts: Once the `fitbit$` prompt appears, type the following command to verify that your devices are recognized: 
bash
   hosts

This should display a list of available hosts, including your Versa 4 and companion phone.

Step 5: Connect Devices

1. Connect Phone: Type the following command to connect your phone: 
bash
   connect phone

2. Connect Device: Then, connect your Versa 4: 
bash
   connect device

After completing these steps, you should see your devices listed and be able to verify that the `hosts` command is working correctly on your Fitbit Versa 4. This process involves using unofficial tools and is intended for educational purposes only[1].

Citations:
[1] https://github.com/cmengler/fitbit-app-versa4
[2] https://www.youtube.com/watch?v=0Lt3MaGnp6k
[3] https://community.fitbit.com/t5/Versa-4/Versa-4-is-not-tracking-my-stats-on-the-main-screen/td-p/5557089
[4] https://www.youtube.com/watch?v=iwRdxKvZin0
[5] https://www.youtube.com/watch?v=S8NNYQfxsPA
[6] https://community.splunk.com/t5/Splunk-Search/Use-Lookup-Table-To-Identify-Hosts-That-Have-Have-Not-Logged/m-p/493468
[7] https://staticcs.fitbit.com/content/assets/help/manuals/manual_versa_en_US.pdf
[8] https://foundation.mozilla.org/en/privacynotincluded/fitbit-versa-4/
[9] https://www.youtube.com/watch?v=_Qxo7QjSZDQ