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canbus: Discord alert when the water-heater DSI fault trips

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New Pi package (repo copy canbus/ha/dsi_fault_alert.yaml): when the CAN
node's DSI-lockout binary sensor holds 'on' for 10s, fire the server-
alerts Discord webhook (@here, appropriately rude), with a cleared
message when it recovers. Webhook URL lives in the Pi's HA secrets.yaml
(!secret discord_server_alerts_webhook), not the repo.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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wes
2026-06-12 15:49:47 -04:00
co-authored by Claude Fable 5
parent 9a5ee30db9
commit e179f1f1fd
2 changed files with 62 additions and 0 deletions
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canbus/HANDOFF.md
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@@ -161,5 +161,9 @@ into the YAML as two `binary_sensor`s; nothing left to do here.
- **Water Heater DSI Fault** = node `95` page-3 `b0` bit5 (`0x20`). Healthy heater
= `0x80` off / `0x81` running; lockout = `0xA0`.
- **Discord alert wired (2026-06-12):** `canbus/ha/dsi_fault_alert.yaml` (on the
Pi as `packages/dsi_fault_alert.yaml`) pings the server-alerts channel via
webhook (`!secret discord_server_alerts_webhook`, same one Gatus uses) when
the fault latches for 10 s, plus a cleared message. Test-fired OK.
- **OneControl System Fault** = page-0 `b0` bit0 (`0x01`), a bus-wide
"fault exists somewhere" flag (read from node `95`'s page 0 in the lambda).