ARIA
b69b7502b3
- Per-pin bar now scales against the 9.2 A per-pin rating (10 A full scale, red at/over rating) instead of the 55 A total connector OCP - Debounced app-wide warning banner (visible on all tabs) when the current between two pins diverges by > 2 A for ~7 s - the signature of a bad pin contact that can overheat and melt the 12VHPWR connector; 5 s grace period after clearing - New pin_imbalance_a sample field (max - min pin current) in both the serial and hwmon sample builders, plus frontend type - Docs: README + WireView.md cover the warning and threshold; fresh screenshot with the new per-pin labels - Tests: vitest setup + 9 unit tests for the debounce state machine; 3 new backend checks for pin_imbalance_a
119 lines
6.3 KiB
Markdown
119 lines
6.3 KiB
Markdown
# WireView Pro II Setup
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NVCurve reads the [Thermal Grizzly WireView Pro II](https://www.thermal-grizzly.com/en/wireview-pro-ii-gpu/s-tg-wv-p2) (12 VHPWR connector monitor) directly over its USB CDC/ACM serial port — **no exporter, no GUI, no kernel module required**.
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Before the first use, the host needs a one-time setup: a udev rule so the serial port is accessible under a stable name and left alone by other tools. After that, NVCurve auto-detects the device over USB — the WireView tab appears while the device is connected and disappears when it is unplugged.
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## Why a one-time setup is needed
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The WireView is an STM32 CDC/ACM virtual serial port (VID `0483`, PID `5740`). Out of the box, Linux:
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- creates the port as `root:uucp 0660` with no stable device name, and
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- lets **ModemManager** probe every new CDC-ACM port with AT/QCDM commands for up to ~30 s after each plug — it holds the port open and sends bytes the device does not expect.
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The udev rule below fixes both: the node becomes `root:dialout 0660`, a stable `/dev/wireview-pro2` symlink is created, and ModemManager is told to ignore the device.
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## 1. Install the udev rule
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```sh
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sudo tee /etc/udev/rules.d/99-wireview.rules > /dev/null <<'EOF'
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# WireView Pro II udev rules
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#
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# Same access policy as wireview-hwmon's 99-wireview-hwmon.rules: the node is
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# 0660 root:dialout, and the user logged in at the local seat gets an ACL via
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# uaccess. systemd applies that tag on hotplug from 73-seat-late.rules, which
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# runs before this 99- file and so never sees it, so each rule also runs the
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# uaccess builtin itself. The tag is still needed: logind uses it to move the
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# ACL to the new active session on a user switch.
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ACTION=="remove", GOTO="wireview_end"
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# Normal operation (STM32 CDC/ACM virtual serial port)
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SUBSYSTEM=="tty", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", GROUP="dialout", MODE="0660", TAG+="uaccess", RUN{builtin}+="uaccess", SYMLINK+="wireview-pro2"
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# Keep ModemManager away: it probes every new CDC-ACM port with AT and QCDM
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# commands for about half a minute, holding the port and sending the device
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# bytes it does not expect.
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SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="0483", ATTR{idProduct}=="5740", ENV{ID_MM_DEVICE_IGNORE}="1"
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SUBSYSTEM=="tty", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", ENV{ID_MM_PORT_IGNORE}="1"
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# DFU bootloader mode (firmware update)
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SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="0483", ATTR{idProduct}=="df11", GROUP="dialout", MODE="0660", TAG+="uaccess", RUN{builtin}+="uaccess"
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LABEL="wireview_end"
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EOF
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```
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> [!WARNING]
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> The rule sets `GROUP="dialout"`. If the `dialout` group does not exist on your distro, udev silently ignores the rule (the node stays `root:uucp`). Create it first: `sudo groupadd dialout`.
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Then reload the rules and apply them to an already-plugged device (a reload alone only affects future hotplugs):
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```sh
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sudo udevadm control --reload-rules
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sudo udevadm trigger
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```
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## 2. Port access
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- **NVCurve web server (systemd):** runs as root, so it can open the port as soon as the rule is in place — nothing else to do.
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- **CLI as a regular user:** add your user to the `dialout` group, then log out/in:
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```sh
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sudo usermod -aG dialout $USER
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```
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A running process only picks up new groups after a re-login; `sg dialout -c 'nvcurve ...'` works for a one-off.
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## 3. Verify
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```sh
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lsusb | grep 0483 # 0483:5740 present
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ls -l /dev/wireview-pro2 # -> /dev/ttyACM0
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```
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With the device plugged in, start (or restart) the NVCurve server. The **WireView** tab appears in the web UI and `GET /api/wireview` returns the device info and live samples. The tab disappears when the device is unplugged and reappears on re-plug — no restart needed.
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## Pin current imbalance warning
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The 12 VHPWR connector is the most fragile part of a PC's power delivery: if one power pin has a bad contact (worn cable, faulty adapter, loose plug), the remaining pins are forced to carry the missing current. Under heavy load this can overheat and melt the connector — in rare cases even start a fire.
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NVCurve watches for this: if the current between any two power pins diverges by more than **2 A**, a big warning appears in the app header (visible on every tab, not just WireView) naming the deviating pins (e.g. `Pin 5 (5.6 A) vs Pin 6 (3.5 A)`). It is debounced — the imbalance must persist for several seconds (~7 s) before the warning shows, so single-sample glitches and short load ramps (e.g. AI workloads) do not flash it. When you see it, reduce the load and replace the cable or adapter — do not keep using the connector.
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## Alternative: wireview-hwmon kernel module
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If the official `wireview-hwmon` kernel module and its `wireviewd` daemon are installed, the daemon owns the serial port and NVCurve automatically reads the sysfs node instead. No udev rule is needed in that case.
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## USB device IDs
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| Mode | VID | PID | Description |
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| --- | --- | --- | --- |
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| Normal | `0483` | `5740` | STM32 CDC/ACM virtual serial port |
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| DFU bootloader | `0483` | `df11` | STM32 bootloader (firmware updates only) |
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## Troubleshooting
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### WireView tab does not appear
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- `lsusb | grep 0483` — is the device visible at all (cable, USB port)?
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- `ls -l /dev/wireview-pro2` — if the node is `root:uucp`, the `dialout` group is missing or the rule did not load: `sudo groupadd dialout && sudo udevadm control --reload-rules && sudo udevadm trigger`.
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- Restart the NVCurve server — detection runs at startup, and the watchdog re-checks periodically afterwards.
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### `Permission denied` on the port (CLI)
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The user must be in the `dialout` group; a running process only picks up new groups after a restart/re-login.
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### Device visible but never connects
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The firmware occasionally stops answering the RTS welcome handshake (observed after USB state changes, e.g. udev re-triggers or boot) while still answering every data command. NVCurve falls back to the vendor-data reply and retries, but if it still does not connect, reset the USB device — physically unplug/replug, or without reaching for it:
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```sh
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P=$(readlink -f /sys/class/tty/ttyACM0)
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DEV=$(dirname "$(dirname "$(dirname "$(dirname "$P")")")")
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sudo bash -c "echo 0 > $DEV/authorized; sleep 1; echo 1 > $DEV/authorized"
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```
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---
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*The udev rule is taken from the wireview-reporter project, which uses the same access policy as the official `wireview-hwmon` module.*
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