| Symptom | Likely Cause | Fix | |---------|--------------|-----| | | Tray not running, firewall blocks port 8150, or wrong protocol (ws vs. wss). | Verify service status ( sc query qztray / systemctl status qztray ). Open port 8150 in firewall. Use qz.websocket.connect() without specifying a URL (defaults to localhost). | | “Certificate not trusted” (browser warning) | Self‑signed cert not added to trust store (common on corporate machines). | Re‑run installer as admin . Manually import qz-tray.pem into Windows Trusted Root or macOS Key
After installation:
Let’s break down the keyword to ensure we address your exact needs: qz tray 19 8 top download
Once the tray icon turns green, your web application can communicate with your printers. | Symptom | Likely Cause | Fix |
// 3. Set up the print config const config = qz.configs.create('POS-Printer', raw: true, // send raw bytes encoding: 'UTF-8', // optional: set DPI, margins, etc. ); Open port 8150 in firewall