Differences

This shows you the differences between two versions of the page.

--- members:sparky:projects [2026/01/10 23:25] – Reach out to Sparky on Zulip or Signal! Sparky
+++ members:sparky:projects [2026/06/03 20:45] (current) – Sparky
@@ Line 1: / Line 1: @@
 # Sparky's Projects
-  ## Current Projects
+## Current Projects
-  ### Transit Tracker
+### Transit Tracker
-  ![](/:members:sparky:img_7282.jpg)
+![](/:members:sparky:img_7282.jpg)
-  A DIY customizable public transit arrivals board displaying real-time transit information. Built using the open-source [Transit Tracker](https://transit-tracker.eastsideurbanism.org/) project by Eastside Urbanism.
+A DIY customizable public transit arrivals board displaying real-time transit information. Built using the open-source Transit Tracker project by Eastside Urbanism, deployed on dma.computer infrastructure.
-  **How to interact with it at dma.space:**
+**How to interact with it at dma.computer:**
-  - **View the display**: The transit board is accessible at `10.20.110.197`
+- **View the display**: The transit board is on the network at `transittracker-display.user.dma.computer` (10.20.110.197)
-  - **API endpoint**: Real-time feed data available at `http://10.20.100.80:3000/feeds`
+- **API endpoint**: Real-time feed data available at `http://transittracker-pi.int.dma.computer:3000/feeds`
-  - **Configure the display**: Use the [web configurator](https://transit-tracker.eastsideurbanism.org/configurator) to customize which routes and stops are shown
+- **API host**: Hosted on `transittracker-pi.int.dma.computer` (10.20.100.80)
+- **Configure the display**: Use the [web configurator](https://transit-tracker.eastsideurbanism.org/configurator) to customize which routes and stops are shown. Configurator routes by default through the upstream OneBusAway-backed feed; the local API runs a sibling GTFS-static feed (`st_gtfs`) for more accurate end-of-day train counts.
-  The board shows arrival times for local transit agencies and updates automatically. Perfect for checking your commute before heading out!
+**Current feed config:**
-  ---
+- `kcm` — King County Metro (GTFS-static)
+- `st` — Sound Transit via OneBusAway (legacy)
+- `st_gtfs` — Sound Transit via GTFS-static + GTFS-RT (used by the display; gives true "trains remaining today")
-  ### TRMNL E-Ink Dashboard
+The board shows arrival times for local transit agencies and updates automatically. Perfect for checking your commute before heading out!
-  ![](/:members:sparky:img_7283.jpg)
+**Repos:**
-  A 7.5" e-ink display dashboard that serves as a distraction-free information display. TRMNL uses a privacy-focused design where the device polls for updates rather than allowing external access to the local network.
+- API: [github.com/sparkyfen/transit-tracker-api](https://github.com/sparkyfen/transit-tracker-api) (fork of [tjhorner/transit-tracker-api](https://github.com/tjhorner/transit-tracker-api))
+- ESPHome firmware: [github.com/sparkyfen/esphome-transit-tracker](https://github.com/sparkyfen/esphome-transit-tracker)
-  **How to interact with it at dma.space:**
+---
-  - **What it shows**: Customizable layouts featuring calendar, weather, news, stocks, and 794+ other plugins
+### ESP32 Transit Tracker (WhereTrain)
-  - **Updates**: The display refreshes only when new information is available, preserving battery life (6+ months on a charge)
-  - **Plugin ecosystem**: Supports integrations with Google Calendar, Home Assistant, weather stations, and community-created plugins
-  - **Developer friendly**: Create custom plugins using HTML/JSON in under 5 minutes
-  **Want to display something specific?** Reach out to Sparky on Zulip or Signal!
-  Learn more at [usetrmnl.com](https://usetrmnl.com)
+![](/:members:sparky:img_7927.jpeg)
-  ---
+A real-time transit tracker that displays Sound Transit Link Light Rail train positions on a physical LED map. The system uses an ESP32-S3 microcontroller to poll live transit data and render animated train movements across an addressable LED strip. Originally designed for /dev/hack Seattle.
-  ## Completed Projects
+**Hardware:**
-  *Coming soon*
+- **Microcontroller**: ESP32-S3 (WROOM-1-N8R8) with 8 MB PSRAM and 8 MB flash
+- **Display**: 76 SK9822 (APA102-compatible) addressable RGB LEDs in a single chain
+- **PCB**: JLCPCB-manufactured, with an expansion connector breaking out unused GPIO, UART pins, and LED access points for external LED strings
+**How it works:**
+- Polls the [OneBusAway API](https://www.soundtransit.org/) for live Sound Transit train positions
+- Renders smooth crossfade animations showing train movements between stops on the LED strip
+- API key can be requested from Sound Transit at `oba_api_key@soundtransit.org`
+**Development:**
+- **Repository**: [codeberg.org/sparkyfen/wheretrain](https://codeberg.org/sparkyfen/wheretrain)
+- **Build environment**: ESP-IDF 5.x (Nix supported) — `cd wheretrain && nix develop && idf.py build flash monitor`
+- **Configuration**: WiFi credentials in `network.c`, API key in `main.c`
+- **Recovery**: Hold BOOT while powering on, then release and flash with `idf.py flash`
+- **License**: CC BY-NC-SA 4.0
+**Status**: Active development. Contributions and feedback welcome — reach out to Sparky on Zulip or check the repo.
+---
+### TRMNL E-Ink Dashboard
+![](/:members:sparky:img_7283.jpg)
+A 7.5" e-ink display dashboard that serves as a distraction-free information display. TRMNL uses a privacy-focused design where the device polls for updates rather than allowing external access to the local network.
+**How to interact with it at dma.computer:**
+- **What it shows**: Customizable layouts featuring calendar, weather, news, stocks, and 794+ other plugins
+- **Updates**: The display refreshes only when new information is available, preserving battery life (6+ months on a charge)
+- **Plugin ecosystem**: Supports integrations with Google Calendar, Home Assistant, weather stations, and community-created plugins
+- **Developer friendly**: Create custom plugins using HTML/JSON in under 5 minutes
+**Want to display something specific?** Reach out to Sparky on Zulip or Signal!
+Learn more at [usetrmnl.com](https://usetrmnl.com)
+---
+## Completed Projects
+*Coming soon*
-  ---