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Docs: panels without a browser (openpanel), device-interpreted I/O ports
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Melvin Strobl
2026-10-14 11:33:27 +02:00
co-authored by Claude Opus 5.5
parent 28a44853e3
commit 3c08e6ef1e
1 changed files with 18 additions and 1 deletions
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docs/interface/dashboards.md
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@@ -194,6 +194,23 @@ charts. On a locked dashboard only the query charts may still publish.
dashboard assignments. Deleting the panel removes the assignment and its
access.
### A screen without a browser
The openpanel firmware, kept in its own repository, draws dashboards as native
widgets on an ESP32-P4 wall panel (Waveshare ESP32-P4-WIFI6-Touch-LCD-7B,
1024×600). Once its config page points it at this instance, it shows the
pairing code itself; enter it as in step 4. It reads the same published
dashboards and live values and draws every widget type with two exceptions,
both shown as a placeholder: a website tile that embeds a page (image tiles
work), and a chart of runs, which a panel credential may not read. Media tiles
play MJPEG streams, pushed frames, images, and H.264 Baseline or MJPEG clips up
to 640×360. Re-encode other clips with the [clip recipe](../code/nodes.md#making-clips-playable-on-an-lvgl-panel).
The device decides what the panel's [I/O](#the-devices-own-io) port names
mean. openpanel serves `gpio.<n>`, `backlight`, `touch`, `mic` and `speaker`,
lists each one's `config` in its README and ignores any other name. A browser
screen serves none of them.
### The device's own I/O
A panel can also act as a node. Under **I/O**, wire a port on the device to a
@@ -201,7 +218,7 @@ message:
| Field | Meaning |
|---|---|
| `port` | The device's name for it, such as `gpio.4`, `backlight`, `screen`, `touch`, `mic` or `speaker`. Lowercase letters, digits, `_` and `.` |
| `port` | The device's name for it, such as `gpio.4`, `backlight`, `touch`, `mic` or `speaker`. Lowercase letters, digits, `_` and `.` |
| `direction` | `in`: the device publishes to the message. `out`: the device follows it |
| `message` | A qualified `flow.name`. A flow must declare it, as for a control |
| `config` | A JSON object passed to the device unread, such as `{"pull": "up", "debounce_ms": 50}` |