diff --git a/pi/README.md b/pi/README.md
index 4e959cd..9ac170a 100644
--- a/pi/README.md
+++ b/pi/README.md
@@ -52,18 +52,43 @@ sudo journalctl -u doorbell -f # live logs
Add to home screen (Chrome menu -> Add to home screen) for an app-like
experience.
-## Changing the camera
+## Choosing the camera
+
+Each Pi is hardcoded to one camera -- the one whose mic and speaker are
+physically co-located with this Pi. The PTT button on this page only
+talks to *this* Pi's speaker, so mixing cameras here would let a misclick
+talk into the wrong room.
`server.py` near the top:
-```js
-const CAMERA_NAME = "front_door";
+```python
+CAMERA_NAME = "front_door"
```
-After editing:
+The name must match a `go2rtc.streams` entry in
+`frigate_config/config.yml` and the camera must be `enabled: true` in
+Frigate. After editing:
```bash
sudo systemctl restart doorbell
```
+## Multiple doorbell Pis
+
+Run one copy of this app per Pi, each on its own subdomain (e.g.
+`frontdoor.yourdomain.com`, `backdoor.yourdomain.com`). Add a Caddy
+block per subdomain pointing at that Pi's LAN IP -- same shape as the
+existing `doorbell.yourdomain.com` block in `../caddy/Caddyfile`.
+
+To render quick-jump buttons to the other Pis at the top of the page,
+fill in `PEER_LINKS` near the top of `server.py`:
+```python
+PEER_LINKS = [
+ {"label": "Back door", "url": "https://backdoor.yourdomain.com"},
+ {"label": "Squirrel", "url": "https://squirrel.yourdomain.com"},
+]
+```
+Leave it as `[]` (the default) and the row is hidden. Restart with
+`sudo systemctl restart doorbell` after editing.
+
## Audio stack
ALSA-only -- no PipeWire/PulseAudio. Lighter on the Pi Zero. If you ever
diff --git a/pi/server.py b/pi/server.py
index 5fd342b..e2d22db 100644
--- a/pi/server.py
+++ b/pi/server.py
@@ -20,6 +20,18 @@ from flask_sock import Sock
app = Flask(__name__)
sock = Sock(app)
+# Camera this Pi corresponds to. Must match a go2rtc stream name in
+# frigate_config/config.yml. The PTT button talks to the speaker physically
+# attached to this Pi, so this should be the camera at the same location.
+CAMERA_NAME = "front_door"
+
+# Optional jump-links to sibling doorbell Pis (each running its own copy of
+# this app, hardcoded to its own camera). Rendered as a row of buttons above
+# the PTT button when non-empty. Leave empty if there are no other Pis.
+PEER_LINKS = [
+ # {"label": "Back door", "url": "https://backdoor.yourdomain.com"},
+]
+
PAGE = """
@@ -46,6 +58,9 @@ PAGE = """
.row{display:flex;gap:8px}
.row button{flex:1;padding:10px;background:#333;color:#fff;border:none;
border-radius:8px;font-size:13px}
+ .row a{flex:1;padding:10px;background:#333;color:#fff;border-radius:8px;
+ font-size:13px;text-decoration:none;text-align:center;
+ display:flex;align-items:center;justify-content:center}
#status{font-size:12px;color:#888;text-align:center;min-height:1em}
@@ -55,6 +70,7 @@ PAGE = """