Inspired by How I Built an NFC Movie Library for my Kids(HN) with some modifications to use Chromecast and Jellyfin instead of Plex and Apple TV.
Create a virutal env and activate it. Then install the esphome requirements.
python3 -m venv .venv --prompt homeassistant-nfc-chromecast
source .venv/bin/activate
pip install -r requirements.txt
Copy secrets-example.yaml to secrets.yaml and set the WiFi password and API password. Then connect the ESP32 microcontroller to USB and run:
esphome run configuration.yaml
Create an Automation for Home Assistant after editing automation.yaml to use the shows from your Jellyfin library.
To get the Jellyfin ids open the Jellyfin web interface and extract it from the URL. For example this show will have the ID c972a911b238ff4e4e864431a559b1c6:
http://jellyfin.example.com:8096/web/#/details?id=c972a911b238ff4e4e864431a559b1c6
To get the tag ID use Home Assistant -> Developer Tools -> Events and listen to the tag_scanned event. Scan a tag and it will dump the tag id like 8D-B5-18-03.
To have a tag select a random episode from a playlist you need to get all of the show's IDs. This is tedious to do manually so I wrote a script.
The most annoying bit is getting the Library ID. The only way I can figure out how to find it is via a broswer inspection of the Library and seeing the 'data-id' field for the Library card. Please let me know if there is a better way.
python jellyfin-dump-ids.py \
--base-url http://jellyfin.example.com:8096 \
--library-id FIND_VIA_DEV_CONSOLE_ON_LIBRARY_DASHBOARD \
--api-key GENERATE_IN_JELLYFIN_DASHBOARD \
--show-name "Game Novel"