Name: BikeMyLight - The bike light support for Fenix 3
Rating: 5 (7 reviews)
Author: AlanSmithee

This app provides the missing support for connected bike lights for older devices like Fenix 3. (The supported list will grow, but for now it's for Fenix3/HR only, because that's my watch ;-) )

With this DataField, you will be able to use your connected bike lights with your old but still capable Fenix 3, just like the newer devices with a built-in support, and even more.

You will get the essential features like: 
    1. Auto-Lights: ON/OFF when you start/end your ride automatically, that’s basically what connected lights all about. 
    2. Multiple lights Pair and Remember.
And also the bonus features like:
    1. Modes Toggle: Double press START button to toggle between Day mode and Night mode (Steady vs. Flash); 
    2. Multiple Lights Smart: If multiple lights were found, lights would behave themselves in a sensible way:
        a. Saving energy at daytime, by only letting one light flashing each direction (front/rear); 
        b. Making you more visible at nighttime, by putting 1 light each direction (front/rear) to steady light, while others flashing at moderate brightness.
    3. Dim when Pause: When auto-pause enabled, lights will be set to less bright mode when you are stopped temporarily, for example, waiting for the traffic lights, to save some energy as well as not to blind others near you.

How to use:
    Pair and Play, simple like that.
    Once paired, lights will turn ON automatically when you start your ride (hit the Start button), auto goes OFF when you end your ride (hit the Stop button), just like a car with the Auto-Lights enabled.

How to pair:
    0. Reset your lights, this is not necessary, you can try straight first, when you got problem, do this and try again.
    1. Download, install, put this DataField into a single-field page in your sport (mostly, "cycling").
    2. Launch your sport, find the page, if it's your first-time, it will automatically enter [Search mode] . Follow the instructions on the screen, press [Start] button to start search. (If you need to re-enter the search mode, use your phone to change the custom settings for this app, check the click box of "True to enter Search Mode", sync and you'll be in.)
    3. Wait till all the lights are shown up, press [Lap] to remember all these lights (or you could call it, "pair").
    4. Stop and Quit current activity, just discard activity, your lights will be remembered anyway.
    5. Launch sport again, don't start, find this page, it should display "Forming", and your lights will be lit up once at a time in a sequence, when it's finished, screen will display "Connecting to Main", then just your lights ID and their status.
    6. You are good to go, press the Start button and try it, lights should be up, then it's a success. Pair is done! Ride and play!
Note: It's best to stop and quit again when you finished step #6 to make sure pairing status are saved correctly (a crash or a power failure will make it not be saved), so next time (and every time afterwards) you launch your sport, it will directly go to "Connecting to Main", without the "Forming" process.
    
** A quick note for the "tricky" pairing procedure:
    Because of the limitations of "DataField", a menu or a select is not possible, which left us little room to deal with the "input", that's why the pairing procedure is not what you're familiar with like the system's built-in sensor management. It's a limitation of the CIQ data field, but anyway we found a way out, and most importantly, it works.

** Supported model:
    Connected lights are expensive, at least for me it's very expensive. So for now it only tested on Bontrager's ION 200 RT and Flare RT, which are the models I have myself, and luckily they're the most available options of connected lights on most markets. The ION Pro RT should also work fine because I believe it shares the same status code as ION 200 RT.
    If you have other lights, contact me and help me make a support.