pebble-fantasy-football

Fantasy Football for Pebble Time 2

Follow all your fantasy leagues from your wrist. Every league you pick gets a matchup card: team names on each side, the live score in the middle, and a red/green bar showing win probability.

One league Two leagues Three leagues Five leagues, scrolled

Currently supports Sleeper. The platform is emery (Pebble Time 2, 200x228, 64-colour).

How the screen divides

The cards split the screen by how many leagues you follow, so two leagues stay readable instead of being squeezed into a list:

Leagues	Each card	Behaviour
1	full screen	—
2	50%	—
3	a third	—
4+	a third	scrolls

Past three leagues the content scrolls — by finger on the touchscreen, or with the Up/Down buttons. Select forces a refresh.

Settings

Open the app’s settings, type your Sleeper username, and tick the leagues you want. Nothing needs an account or an API key: Sleeper’s read API is public.

Win probability

Sleeper’s API exposes no win-probability field, so this computes one:

Take each team’s live score.
Add up Sleeper’s projections for the starters who have not played yet.
Treat the projected margin as normal with σ = 9.0 × sqrt(players left) and read the win probability off the normal CDF.

Before kickoff that reproduces the direction and rough magnitude of Sleeper’s own number — including the common case where the team with the better record is the underdog this week. It is a model, not Sleeper’s model, so it will not match their figure exactly.

Scoring type is detected per league from scoring_settings.rec (PPR / half-PPR / standard).

Building

Needs the Pebble SDK and pebble tool.

pebble build --sdk 4.33.1                        # for a real Pebble Time 2
pebble install --phone <ip>                      # sideload

A note on SDK versions

The touch-scrolling path differs by SDK, and src/c/main.c compiles both ways off _PBL_API_EXISTS_pan_recognizer_create:

SDK 4.33+ — a vertical pan_recognizer drives the ScrollLayer, with window_set_touch_bridge_disabled() so the recognizer receives the touch stream. This is the correct path, and what a real watch should run. A bare ScrollLayer does not scroll by touch on its own.
Older SDKs — the same scrolling is hand-rolled from raw touch_service_subscribe() events.

The fallback exists for a practical reason: at the time of writing the 4.33.1 emery firmware does not boot in the QEMU emulator, so emulator testing happens on 4.9.169:

pebble build --sdk 4.9.169
pebble install --emulator emery --sdk 4.9.169
pebble screenshot --no-open --emulator emery --sdk 4.9.169

Settings page hosting

config.html is served from GitHub Pages at https://archive.michaellunzer.com/pebble-fantasy-football/config.html , and CONFIG_URL in src/pkjs/index.js points at it. Sleeper’s API sends Access-Control-Allow-Origin: *, so the page queries it straight from the browser with no proxy.

To test it against a local emulator instead:

pebble emu-app-config --emulator emery --sdk 4.9.169 --file config.html

Licence / fair use

Sleeper’s API is free for non-commercial use only. This project is not affiliated with Sleeper.