Zem-Internal HV Test Box is a Visual Studio Code extension for Zeptools (ZEM) internal high-voltage box validation and production testing. It provides the same control surface as the standalone Electron application, embedded directly in your VS Code or Cursor workspace.

Features

Serial communication — Connect to the HV box over COM port with protocol-level TX/RX logging.
Live monitoring — Real-time HV, filament, grid, and emission (Ie) readouts with polling control.
Manual control — Set voltage, filament, and grid parameters with action logging.
Session timeline — In-session table and chart with zoom-adaptive curve rendering.
Measurement storage — SQLite-backed measurement history for long-running tests.
Communication logs — Daily plain-text log files for audit and troubleshooting.
Export — Export communication logs and session data to the desktop on demand.

Requirements

Visual Studio Code 1.85+ or compatible Cursor build
Windows with a available COM port and HV box hardware
Native modules (serialport, better-sqlite3) are bundled for the extension host Electron ABI

Getting Started

Install the extension from the Visual Studio Marketplace.
Open the Command Palette (Ctrl+Shift+P).
Run Zem HV Test: Open Control Panel.
Select your COM port and start polling.

The control panel opens as a VS Code webview with the full HV test UI.

Commands

Command	Description
`Zem HV Test: Open Control Panel`	Open or focus the HV control webview panel

Data Storage

Data	Location
Measurements	`%APPDATA%/hvbox-vscode/measurements` (SQLite)
Communication logs	`%APPDATA%/hvbox-vscode/logs-text/`
User settings	`%APPDATA%/hvbox-vscode/settings.json`