Using the Fitbit Versa 4 developer bridge without a PC is challenging due to several limitations. Here's a detailed overview of the situation:
1. Developer Bridge Requirements: The developer bridge typically requires a connection to a PC for debugging and testing apps. It involves enabling USB debugging on the device, which is usually done by connecting the watch to a computer via a charger cable[1][3]. However, the Versa 4 does not support WiFi for developer bridge connections, unlike some older models like the Versa 3[2][3].
2. Versa 4 Limitations: The Versa 4 does not have an official SDK released yet, which means there is no straightforward way to develop or test apps directly on the device without a PC[2][5]. The lack of an SDK also implies that the developer bridge functionality might not be fully supported or functional for the Versa 4[5].
3. Mobile App Limitations: While you can access the developer menu through the Fitbit mobile app, the actual development and testing process typically require a PC connection for tasks like building and debugging apps[1][2]. The mobile app can facilitate some settings but does not replace the need for a PC for comprehensive development tasks.
4. Workarounds and Alternatives: Since there is no official support for developing apps on the Versa 4, developers are advised to use older models like the Versa 3 for development purposes. Once an app is developed, it can be tested on the Versa 4 through other means, but this is not a straightforward process without official SDK support[5].
In summary, using the Fitbit Versa 4 developer bridge without a PC is not feasible due to the lack of an official SDK and the device's limitations in supporting developer bridge functionality over Bluetooth or other wireless means. Development and testing typically require a PC connection for tasks like building, debugging, and deploying apps.
Citations:[1] https://github.com/cmengler/fitbit-app-versa4
[2] https://community.fitbit.com/t5/SDK-Development/Versa-4-unable-to-connect-to-fitbit-studio-developer-bridge/td-p/5283914
[3] https://stackoverflow.com/questions/73916842/how-can-i-enable-versa-4-usb-debugging
[4] https://www.bhphotovideo.com/lit_files/399654.pdf
[5] https://community.fitbit.com/t5/SDK-Development/Fitbit-Versa-4-SDK-support/td-p/5570528
[6] https://www.reddit.com/r/fitbit/comments/1bkzzqh/google_will_remove_thirdparty_apps_and_clocks/
[7] https://www.youtube.com/watch?v=lWDxOAVBZ0w
[8] https://support.google.com/fitbit/answer/14236934?hl=en
[9] https://xdaforums.com/t/how-can-i-enable-versa-4-usb-debugging.4500235/