@modbus-ts/transport-ws

Browser WebSocket transport adapter for Modbus traffic.

Installation

pnpm add @modbus-ts/transport-ws

Core Exports

• WsTransportOptions
• WsTransport

Minimal Example

import { WsTransport } from '@modbus-ts/transport-ws'

const transport = new WsTransport({
  url: 'ws://127.0.0.1:18080',
  reconnectDelayMs: 300,
  maxReconnectDelayMs: 5000,
})

await transport.connect()
await transport.send(new Uint8Array([0, 1, 0, 0, 0, 6, 1, 3, 0, 0, 0, 1]))

Behavior

• Buffers and reassembles MBAP-based frames
• Automatic reconnect with exponential backoff
• Designed for browser to gateway communication

Packages

• high-level Modbus client
• shared contracts, types, and errors
• FC1/FC2/FC3/FC4/FC5/FC6/FC15/FC16 frame encode/decode for TCP/RTU/ASCII
• serial request queue with priority
• polling engine and range merge
• Node TCP transport with reconnect
• Node UDP transport
• browser WebSocket transport with reconnect
• typed Electron main/renderer bridge
• Electron IPC transport adapter
• WebSocket to TCP binary relay gateway
• register-value codec helpers
• shared async and comparison utilities