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docs: handoff — projector added to Google Home + DHCP-reservation durable fix

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Continues from the Google Home TV integration handoff. Diagnosed that projector
PJLink control was broken (HA host .156 stale; projector drifted to .149), fixed
HA + exposed media_player.mitsubishi_projector to Google Home, and pinned the IP
via an Omada DHCP reservation. New helper pushed to Seth/network-tools.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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2026-06-06 07:52:31 -04:00
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# Handoff: Mitsubishi Projector → Google Home + DHCP-reservation durable fix
## Session Metadata
- Created: 2026-06-06 07:50:38
- Project: /home/claude/bin/lgtv
- Branch: master
- Session duration: ~1 hour (continuation of the Google Home work)
### Recent Commits (for context)
- 111198b docs: handoff + decisions — Google Home TV integration live end-to-end
- ddfb768 chore: project-id-named icon copy (seth-freiberg.png) for Google Home upload
- d07f334 feat: 144x144 transparent PNG app icon for Google Home action
- 205bc15 docs: session handoff — consolidation + fixes complete and verified
- 66b0f51 docs: record OFF-path gotchas (CWD-relative key path, freshly-woken retry)
(Note: this session's only *committed* artifact landed in the new **network-tools**
repo, not lgtv — see Files Modified. The lgtv repo itself was not changed.)
## Handoff Chain
- **Continues from**: [2026-06-06-070435-google-home-tv-integration.md](./2026-06-06-070435-google-home-tv-integration.md)
- Previous title: LG TV → Home Assistant → Google Home (working end-to-end)
- **Supersedes**: None
> Review the previous handoff for full context before filling this one (HA google_assistant
> setup, the hard-won console settings, and the outstanding TV-side security cleanup).
## Current State Summary
DONE and verified. Seth asked to add the **Mitsubishi projector** (already in HA via
PJLink) to the existing Google Home integration. While doing so I checked whether the
projector control actually worked — **it did not**: HA's PJLink `media_player` was
hard-coded to `host: 192.168.0.156`, but the projector had DHCP-drifted to
`192.168.0.149` (`.156` is now a different device). The entity had been silently
`unavailable`. Fixed the IP in HA, exposed the projector to Google Home, then applied
the **durable fix**: an Omada DHCP reservation pinning the projector MAC to `.149` so
it can't drift again. Wrote a reusable Omada reservation helper, committed + pushed it
to a **new private Gitea repo `network-tools`**. Updated `network_inventory.md` and
`ROUTER.md`. The only user action left is a one-time Google "sync my devices".
## Codebase Understanding
### Architecture Overview
- **Projector control path**: Google Home → Google smart-home cloud → HA `google_assistant`
(VM HA 192.168.0.146) → HA `media_player.mitsubishi_projector` (PJLink platform,
YAML) → TCP PJLink :4352 on the projector (192.168.0.149).
- **PJLink** is auth-required (greeting `PJLINK 1 <salt>`); HA authenticates with
`password: MITSUBISHI` (MD5 digest of `salt+password`). Verified directly: a power
query returned `%1POWR=0` (standby) with no `ERRA`, i.e. auth OK.
- **Projector keeps its NIC + PJLink alive in standby** (answered PJLink while
`POWR=0`). So **turn-ON via PJLink works** — unlike the LG TV, no Wake-on-LAN needed.
(This corrects a wrong caveat I gave mid-session.)
- **DHCP** is served by the **router (ER707-M2, 192.168.0.1)**, managed by the **Omada
controller** (CT 104 on pve197, `https://192.168.0.10:8043`). Reservations are
per-client "Use Fixed IP" bindings, settable only via the **internal `/api/v2`** API
(the partner OpenAPI doesn't expose them).
### Critical Files
| File | Purpose | Relevance |
|------|---------|-----------|
| `/config/configuration.yaml` (VM HA .146) | `media_player: pjlink host: 192.168.0.149` + `google_assistant.entity_config` | backed up to `/config/.backup/configuration.yaml.1780745129` |
| `~/bin/network-tools/omada_reserve_ip.py` | Omada DHCP reservation helper (explore/reserve/show) | committed + pushed to Gitea |
| `~/bin/network-tools/.omada.env` | Omada creds for the helper (gitignored, chmod 600) | NOT in git |
| `~/bin/network_inventory.md` | corrected projector `.156→.149`, Epson XP-7100 marked offline | NOT under git (plain file in ~/bin) |
| `~/bin/ROUTER.md` | new "DHCP Reservations" section (helper ref + netId) | NOT under git |
### Key Patterns Discovered
- **Omada internal API for reservations**: login `POST /{omadacId}/api/v2/login`
(admin / Omada pw) → `Csrf-Token` header + session cookie; then
`PATCH /{omadacId}/api/v2/sites/{siteId}/clients/{MAC}` with
`{"clientMac": MAC, "ipSetting": {"useFixedAddr": true, "netId": <LAN id>, "ip": <ip>}}`.
Field is **`useFixedAddr`** (not `useFixedIp`). Site `69c1cacc701bf5355840cde0`,
Default-LAN netId `69c1cacd701bf5355840cdeb` (subnet 192.168.0.1/24).
- **HA YAML platform entities** (pjlink media_player) don't appear in
`.storage/core.entity_registry`; entity_id is the slugified `name:` →
`media_player.mitsubishi_projector`.
- **Verify HA entity state without a long-lived token**: from the SSH add-on shell,
`curl -H "Authorization: Bearer $SUPERVISOR_TOKEN" http://supervisor/core/api/states/<entity>`.
## Work Completed
### Tasks Finished
- [x] Diagnosed projector control as broken (stale IP `.156`; actual `.149`, MAC `00:20:4a:a5:d0:b6`).
- [x] Verified PJLink works at `.149` (greeting, MD5 auth, `%1POWR=0`).
- [x] Fixed HA `host: .156 → .149`; `ha core check` passed; restarted; entity now `available` (`off`, supported_features 2440 = on/off/source/mute).
- [x] Exposed projector to Google Home: added `media_player.mitsubishi_projector` (name "Projector", alias "Mitsubishi Projector", **no room** per Seth) to `google_assistant.entity_config`.
- [x] Durable fix: Omada DHCP reservation MAC→`.149`, verified persisted (`useFixedAddr:true`, serverType gateway).
- [x] Wrote `omada_reserve_ip.py`, externalized creds to gitignored `.omada.env`, committed; created **private Gitea repo `network-tools`** and pushed.
- [x] Updated `network_inventory.md` + `ROUTER.md`.
### Files Modified
| File | Changes | Rationale |
|------|---------|-----------|
| VM HA `/config/configuration.yaml` | pjlink `host .156→.149`; added projector to `entity_config`; comment updated | fix control + expose to Google |
| `~/bin/network-tools/omada_reserve_ip.py` (new) | Omada reservation helper | reusable, first use = projector |
| `~/bin/network-tools/.gitignore` (new) | ignore `.omada.env`, `__pycache__/`, `.backup/` | keep secrets/noise out of git |
| `~/bin/network_inventory.md` | projector `.156→.149` reserved; Epson XP-7100 → offline; reservation note | accuracy |
| `~/bin/ROUTER.md` | new "DHCP Reservations" section | discoverability |
### Decisions Made
| Decision | Options Considered | Rationale |
|----------|-------------------|-----------|
| Reserve `.149` (current IP) | revert to documented `.156` | `.156` now held by another device; `.149` is the projector's live IP — no conflict |
| Fix at DHCP layer (reservation) | just edit HA IP again | editing HA only resets the drift clock; reservation pins MAC→IP at the router |
| New private Gitea repo for network-tools | leave local-only / move script to lgtv | Seth chose "create private Gitea repo"; only 2 clean files pushed |
| Creds in gitignored `.omada.env` | hardcode in script | detect-secrets pre-commit hook blocked hardcoded creds; env file is the right fix (no `--no-verify`) |
| Projector exposed with no Google room | Living Room / Media Room | Seth chose "No room" |
## Pending Work
## Immediate Next Steps
1. **Seth says "Hey Google, sync my devices"** then tests "turn on/off the projector".
The auto `requestSync` 400s on the free integration (known), but the voice SYNC
path works (same path the TV uses). Until synced, the projector won't appear in the app.
2. (Carried over from prior handoff, still outstanding) **TV-side security cleanup** —
rotate the GCP SA key(s), HA SSH add-on password, HA long-lived token; remove temp
Logs Viewer role; delete `seth-freiberg-4ba9cc3a2d99.json`. See previous handoff §SECURITY.
### Blockers/Open Questions
- [ ] None blocking. Projector is controllable from HA now; Google needs the one sync.
### Deferred Items
- Adding network-tools' other (untracked, credential-bearing) scripts to the new repo —
left untracked deliberately; clean them before tracking.
- DHCP reservation for the LG TV (TV uses a cached-IP probe instead; not needed).
## Context for Resuming Agent
## Important Context
- **Do not "re-fix" the Google Home TV integration** — see prior handoff; the console
settings are hard-won (scopes email+name, HTTP-basic-auth checkbox OFF, project_id
seth-freiberg). This session only ADDED the projector entity alongside the TV switch.
- **The projector lives at `192.168.0.149`, DHCP-reserved.** If it ever seems
unreachable, confirm the reservation with
`~/bin/network-tools/omada_reserve_ip.py show 00:20:4a:a5:d0:b6` and that HA's
`host:` still matches.
- **`requestSync` 400 is expected** on this free integration and is NOT a regression —
`report_state` to the same HomeGraph endpoint succeeds, proving SA auth is healthy.
### Assumptions Made
- The Epson XP-7100 printer (MAC `38:9d:92:b4:64:f1`) was the stale `.149` holder; it's
currently offline (no ARP entry, no Omada client record) and had no reservation, so
reserving `.149` for the projector creates no active conflict — it'll get a new
dynamic IP next boot.
- steel141 / VM HA / Omada controller all stay effectively always-on.
### Potential Gotchas
- **PROCESS MISS this session**: I edited `network_inventory.md` and `ROUTER.md`
WITHOUT backing them up first (violated the pre-edit backup rule). They're not under
git, so no pre-edit copy exists. Edits were small/corrective. Back these up before
future edits.
- **Credential sprawl**: the Omada admin password now exists in `ROUTER.md` (plaintext,
already flagged H4 in `GITEA_SECURITY_REPORT.md`) AND `~/bin/network-tools/.omada.env`.
If rotating, update both.
- **network-tools repo** has ~15 untracked scripts that likely contain switch/router
creds — do NOT `git add .` blindly; they were intentionally left untracked.
- HA `http.ban` can ban Google IPs if `/auth/token` posts fail repeatedly — check
`/config/ip_bans.yaml` if Google linking ever breaks instantly (from prior handoff).
## Environment State
### Tools/Services Used
- VM HA 2026.2.x at 192.168.0.146 (HAOS); SSH add-on :22 (user seth, passwordless sudo).
- Omada controller CT 104 on pve197, `https://192.168.0.10:8043` (internal `/api/v2` + OpenAPI).
- Router ER707-M2 (192.168.0.1) = DHCP server (`serverMac 40-ED-00-DA-2D-BA`).
- Projector: Mitsubishi PJLink at 192.168.0.149:4352 (MAC `00:20:4a:a5:d0:b6`), on switch port 1/0/3.
- New repo: `https://git.sethpc.xyz/Seth/network-tools` (private).
### Active Processes
- HA `google_assistant` integration loaded; projector + TV exposed.
- `lgtv-mqtt.service` on steel141 (TV bridge; unchanged this session).
### Environment Variables
- `OMADA_HOST`, `OMADA_CID`, `OMADA_SITE`, `OMADA_USER`, `OMADA_PASS` — consumed by
`omada_reserve_ip.py` from gitignored `.omada.env` (names only; values not here).
- `SUPERVISOR_TOKEN` — available in the HA SSH add-on shell for core API queries.
## Related Resources
- Prior handoff: `.claude/handoffs/2026-06-06-070435-google-home-tv-integration.md`
- `~/bin/ROUTER.md` (Omada/DHCP), `~/bin/network_inventory.md` (IP/MAC table)
- `~/bin/network-tools/omada_reserve_ip.py` + Gitea `Seth/network-tools`
- HA Google Assistant docs: https://www.home-assistant.io/integrations/google_assistant/
---
**Security Reminder**: Credential VALUES are omitted here; names/locations only.
Omada password lives in `ROUTER.md` and `.omada.env` — rotate both if needed.