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Docs: full README rewrite + gui_client.py module docstring update

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README now covers:
- Updated diff-mode section (self-describing protocol, no _diff marker)
- Full GUI section with Connector/Dashboard/Plot tab descriptions
- Plot mouse interactions table (scroll, Shift+scroll, drag)
- Module reference for all server/, utils/, and gui_client classes
- --dry flag and all credential-file keys documented

gui_client.py module docstring updated to list tabs and mouse interactions.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
jens
2026-05-26 17:01:42 +02:00
co-authored by Claude Sonnet 4.6
parent d0e4ec374c
commit 55719010da
2 changed files with 198 additions and 48 deletions
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README.md
+177 -34
View File
@@ -16,6 +16,8 @@ server/
storage_helpers.py — load / save JSON store, midnight rotation helpers
we_connect.py — WeConnect login and vehicle selection
log_config.py — logging setup
utils/
jay_diff.py — JSON diff / merge library
credentials/ — JSON config files (gitignored)
requirements.txt
```
@@ -32,11 +34,13 @@ Or use the installer which also sets up a systemd user service:
./install.sh
```
---
## Collector (`collect.py`)
Connects to WeConnect, polls selected domains at a configurable interval, and
appends records to a rotating JSON log. Simultaneously runs a TCP push server
so clients receive every new snapshot the moment it is collected.
appends timestamped records to a rotating JSON log. Simultaneously runs a TCP
push server so clients receive every new snapshot the moment it is collected.
### Quick start
@@ -68,7 +72,8 @@ All connection and collection settings live in a single JSON file:
"interval_s": 300,
"host": "0.0.0.0",
"port": 9999,
"log_dir": "./logs"
"log_dir": "./logs",
"diff": false
}
```
@@ -82,11 +87,11 @@ All connection and collection settings live in a single JSON file:
| `host` | `"0.0.0.0"` | Push server bind address |
| `port` | `9999` | Push server TCP port |
| `log_dir` | `"./logs"` | Directory for rotating JSON log files |
| `diff` | `false` | Enable diff mode for push server transmission |
| `diff` | `false` | Enable diff-mode compression on the push server |
### CLI reference
CLI flags override the corresponding credentials file value when given.
CLI flags override the corresponding credentials-file value when given.
| Flag | Overrides | Description |
|------|-----------|-------------|
@@ -97,9 +102,9 @@ CLI flags override the corresponding credentials file value when given.
| `--host HOST` | `host` | Push server bind address |
| `--port PORT` | `port` | Push server TCP port |
| `--log-dir DIR` | `log_dir` | Directory for rotating log files |
| `--max-records N` | — | Keep only the last N records per file |
| `--diff` | `diff` | Send diffs instead of full snapshots (must match client setting) |
| `--dry` | — | Skip WeConnect; run push server only (for testing) |
| `--max-records N` | — | Keep only the last N records per file (default: unlimited) |
| `--diff` | `diff` | Enable diff-mode on the push server |
| `--dry` | — | Skip WeConnect login; run push server only (useful for GUI testing) |
| `-v` | — | Verbose / debug logging |
| `--list-domains` | — | Print available domains and exit |
@@ -136,24 +141,34 @@ Log files are named `YYYY_MM_DD_HH_MM_SS_<VIN>.json` and contain:
Physical values are always `{"value": …, "unit": …}` objects.
---
## Push server protocol
The server listens on the `host`:`port` from the credentials file (default `0.0.0.0:9999`).
The server listens on the `host`:`port` from the credentials file
(default `0.0.0.0:9999`).
* On connect: sends all records from the last 24 hours, sorted by timestamp.
* On each new poll: sends the new snapshot immediately.
* **On connect:** sends all records from the last 24 hours, sorted by timestamp.
* **On each new poll:** sends the new snapshot immediately.
All messages are **newline-delimited JSON** (one record per line, `\n` terminated).
### Diff mode (`--diff`)
When enabled on the server, the history burst is compressed: the first
record is sent in full, subsequent records as `jay_diff_full` diffs
(`{"_diff": true, "update_add": {…}, "delete": {…}}`). Live snapshots
are also diffed against the previous broadcast. Enable `--diff` on the
client side (`client.py`) or check **Diff mode** in the GUI Connector
tab to reconstruct full snapshots from the stream. Both sides must
agree — a mismatch produces garbled output.
When diff mode is enabled the history burst and every live snapshot are
compressed using `jay_diff_full` before transmission. The wire format is
self-describing — diffs carry `update_add` / `delete` keys, full snapshots do
not — so no separate framing is needed.
The first message sent to a new client is always `jay_diff_full({}, record[0])`,
i.e. an `update_add` containing every field of the first record. Subsequent
messages contain only the fields that changed.
Enable `--diff` on the server **and** on the client (`client.py --diff` or the
**Diff mode** checkbox in the GUI Connector tab). Both sides must agree — a
mismatch produces garbled output.
---
## GUI client (`gui_client.py`)
@@ -161,39 +176,167 @@ agree — a mismatch produces garbled output.
python gui_client.py
```
Dark theme. Three tabs:
Dark-theme PyQt5 application. Three tabs: **Connector**, **Dashboard**,
**Plot**. Connection settings, trace selections, and time windows are persisted
to `~/.config/we_monitor/plot_settings.json` and restored on the next launch.
### Connector tab
Enter host and port, then click **Connect**. Settings are saved automatically
and restored on the next launch. All plot data is cleared on each
connect so fresh server history is never mixed with stale local data.
| Control | Description |
|---------|-------------|
| **Host / Port** | Address of the `collect.py` push server |
| **Diff mode** checkbox | Must match the server's `--diff` setting |
| **Connect / Disconnect** | Opens or closes the TCP connection |
| **Status** | Shows `Connected`, `Disconnected`, or the error message |
Clicking **Connect** saves the current host, port, and diff-mode setting. All
plot data is cleared on each connect so the fresh server history is never mixed
with stale local data.
### Dashboard tab
Live tree view of the latest snapshot — domain → status object → field,
showing value and unit. Expand state is preserved across updates.
Live tree view of the most recent snapshot. The hierarchy mirrors the JSON
structure: domain → status object → field, with value and unit shown inline.
Expand / collapse state is preserved across updates.
### Plot tab
8 plots (4 × 2) in a scrollable grid. Each plot has its own control bar:
Eight plots arranged in a 4 × 2 scrollable grid. Each plot is independent and
has its own control bar.
* **Time window spinner** — show the last 1–24 hours (per plot).
* **Dropdown + `+`** — select a signal and add it as a trace (max 4 per plot).
* **Colored chips (`name ×`)** — click to remove a trace.
* Zoom / pan with mouse; crosshair cursor tracks mouse position.
* When available data is less than the selected window, the x-axis adjusts
to the actual data extent — no empty gap on the left.
#### Control bar (per plot)
Trace selections, time windows, and connection settings are persisted to
`~/.config/we_monitor/plot_settings.json` and restored automatically on
the next launch.
| Control | Description |
|---------|-------------|
| **Signal dropdown** | Lists every numeric `{value, unit}` field received so far |
| **`+` button** | Adds the selected signal as a new trace (max 4 per plot) |
| **Colored chips** (`name ×`) | One chip per active trace; click `×` to remove |
| **Time window spinner** | Show the last 1–24 hours of data (per plot) |
| **Date label** (right-aligned) | Shows the calendar date(s) of the visible window — single date or `YYYY-MM-DD – YYYY-MM-DD` when the view spans midnight |
#### Plot area
* **X axis** — time of day in `HH:MM:SS` format; no locale-dependent date prefix.
* **Y axis** — auto-zooms to fit the visible data on the first draw after connect
or after a trace is added / removed. Manual zoom is preserved between data
updates.
* **Crosshair** — dashed vertical line tracks the mouse cursor.
* **Floating tooltip** — appears next to the cursor and shows the nearest
sampled value for every active trace, with a colored bullet and unit.
* **Legend** — trace names and colors, shown inside the plot area.
#### Mouse interaction
| Action | Effect |
|--------|--------|
| Scroll wheel | Zoom X axis in / out, centred on cursor |
| Shift + scroll wheel | Zoom Y axis in / out, centred on cursor |
| Click + drag | Pan the view |
| Right-click | pyqtgraph context menu (export, auto-range, …) |
---
## CLI test client (`client.py`)
```bash
python client.py --host 192.168.1.10 --port 9999
python client.py --diff # reconstruct from diff stream
```
Connects to the push server and prints every incoming snapshot as
pretty-printed JSON with a running record counter.
| Flag | Description |
|------|-------------|
| `--host HOST` | Server host (default: `127.0.0.1`) |
| `--port PORT` | Server port (default: `9999`) |
| `--diff` | Reconstruct full snapshots from diff stream |
---
## Module reference
### `collect.py`
Entry point for the collector daemon. Parses CLI / credentials-file arguments,
establishes the WeConnect session, starts the push server, and runs the main
poll loop.
### `server/data_model.py`
`collect_snapshot(vehicle, domains) → dict`
Iterates over the requested domains on a `weconnect.Vehicle` and extracts every
`Status` attribute into a flat-ish dict keyed by domain and status-object name.
Physical values are normalised to `{"value": …, "unit": …}`. Returns a record
with a top-level `"ts"` ISO-8601 timestamp.
`ALL_DOMAINS`
Tuple of all domain names the collector knows about.
### `server/network.py`
`start_push_server(host, port) → (clients, lock, store_ref)`
Binds a TCP socket, starts the accept-loop thread (daemon), and returns the
shared state needed by `broadcast`.
`broadcast(snapshot, clients, lock)`
Serialises `snapshot` to a JSON line and sends it to every connected client.
Dead connections are removed silently.
`store_ref` dict keys:
| Key | Type | Description |
|-----|------|-------------|
| `"current"` | `dict` | The currently-open JSON store |
| `"preloaded"` | `list` | 24-h history records loaded at startup |
| `"diff_mode"` | `bool` | Whether to compress the history burst as diffs |
### `server/storage_helpers.py`
`load_store(path, vin, interval) → dict`
Loads an existing store file or creates a fresh one.
`save_store(path, store, max_records)`
Writes the store to disk, optionally trimming to the last `max_records` entries.
`auto_out_path(log_dir, vin) → Path`
Returns a timestamped file path for a new store.
`load_last_24h_records(log_dir, vin) → list`
Scans the log directory for files belonging to `vin`, loads any records from
the last 24 hours, and returns them sorted by timestamp.
### `server/we_connect.py`
`connect(username, password) → WeConnect`
Authenticates and returns a connected `WeConnect` instance.
`select_vehicle(wc, vin) → (vehicle, error)`
Returns the target vehicle (first available if `vin` is empty) or an error string.
### `utils/jay_diff.py`
Lightweight JSON diff / patch library.
`jay_diff_full(old, new, combine_upd_add=True) → dict`
Computes a diff between two dicts. With `combine_upd_add=True` (the default
used everywhere in this project) the result uses `update_add` for all additions
and updates, plus a separate `delete` key. Returns `{}` when nothing changed.
`jay_merge_full(old, diff) → dict`
Applies a `jay_diff_full` diff to `old`. The diff structure is self-describing:
if `diff` contains none of the known diff keys (`update`, `update_add`, `add`,
`delete`) and `old` is empty, `diff` is returned as-is (full-snapshot
passthrough for bootstrap).
### `gui_client.py` — class overview
| Class | Role |
|-------|------|
| `TcpReader` | Background thread; reads newline-delimited JSON from the socket, reconstructs full snapshots in diff mode via `jay_merge_full`, and emits each snapshot via the `message` Qt signal |
| `ConnectorTab` | Host / port / diff-mode form; emits `connect_requested` and `disconnect_requested` signals; persists settings |
| `DashboardTab` | Live `QTreeWidget` showing the latest snapshot; preserves expand state across updates |
| `PlotTab` | Eight independent time-series plots in a scrollable grid |
| `TimeAxisItem` | `pg.AxisItem` subclass; formats x-axis tick labels as `HH:MM:SS` |
| `PlotViewBox` | `pg.ViewBox` subclass; routes plain scroll to X zoom and Shift+scroll to Y zoom |
| `PlotTooltip` | Frameless child `QWidget` per plot; shows nearest sampled values for all active traces at the cursor position |
| `MainWindow` | `QMainWindow`; wires the three tabs together and owns the `TcpReader` |
gui_client.py
+11 -4
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@@ -2,13 +2,20 @@
"""
WeConnect GUI client.
Connects to the collect.py TCP push server and displays live data.
Connects to the collect.py TCP push server and displays live vehicle data.
Tabs
----
Connector — server address, connect / disconnect, status
Dashboard — live tree view of the latest snapshot
Plot — time-series charts of all physical {value, unit} fields
Connector — host / port / diff-mode form; connect / disconnect
Dashboard — live tree view of the latest snapshot (domain → object → field)
Plot — 8 independent time-series plots in a scrollable 4×2 grid
Plot interactions
-----------------
Scroll wheel — zoom X axis in/out, centred on cursor
Shift + scroll wheel — zoom Y axis in/out, centred on cursor
Click + drag — pan
Crosshair + tooltip — dashed vertical line + floating value readout per trace
"""
import json