tauri-plugin-thermoprint

Tauri v2 plugin for thermal receipt printing with thermoprint.

Features

• List serial ports — discover connected printers
• Print raw ESC/POS bytes — send bytes directly to a serial port
• Print from JSON template — render a template and print in one call
• Chunked writes — avoids overflowing printer buffers

Setup

Rust side

Add to src-tauri/Cargo.toml:

[dependencies]
tauri-plugin-thermoprint = { git = "https://github.com/mouhamed1296/thermoprint" }

Register the plugin in src-tauri/src/main.rs:

fn main() {
    tauri::Builder::default()
        .plugin(tauri_plugin_thermoprint::init())
        .run(tauri::generate_context!())
        .expect("error running app");
}

JavaScript side

import { invoke } from '@tauri-apps/api/core';

// List available serial ports
const ports = await invoke('plugin:thermoprint|list_ports');
// → [{ name: "/dev/ttyUSB0", port_type: "USB (VID:0416 PID:5011 - POS Printer)" }]

// Build receipt bytes (using thermoprint WASM or template)
const bytes = [0x1B, 0x40, ...]; // ESC/POS bytes

// Print to a serial port
await invoke('plugin:thermoprint|print_serial', {
  port: '/dev/ttyUSB0',
  baudRate: 9600,
  data: bytes,
});

// Or render a template and print in one shot
await invoke('plugin:thermoprint|print_template', {
  port: '/dev/ttyUSB0',
  baudRate: 9600,
  template: JSON.stringify({
    width: "80mm",
    currency: "FCFA",
    language: "fr",
    elements: [
      { type: "init" },
      { type: "shop_header", name: "MA BOUTIQUE", phone: "+221 77 000", address: "Dakar" },
      { type: "divider", char: "=" },
      { type: "item", name: "Polo shirt", qty: 2, unit_price: "15000" },
      { type: "total", amount: "30000" },
      { type: "feed", lines: 3 },
      { type: "cut" }
    ]
  }),
});

Commands

License

MIT © Mamadou Sarr