@kortoaus/cas-scale NPM

@kortoaus/cas-scale

A lightweight TypeScript library for interfacing with CAS PD-II electronic weighing scales over RS-232 serial communication.
Automatically requests and parses weight data from the scale, using the serialport package under the hood.

✅ Tested and confirmed to work with CAS PD-II in ECR-TYPE 2 (STX/ETX protocol mode) only.

✨ Features

✅ Automatically sends weight request commands (W)
✅ Parses 7-byte responses from CAS PD-II scale
✅ Emits weight in kilograms via callback
✅ Works with Node.js & TypeScript
✅ Tiny, dependency-light wrapper

📦 Installation

npm install @kortoaus/cas-scale

🚀 Usage

import { initializeScale } from "@kortoaus/cas-scale";

initializeScale("/dev/tty.usbserial-B002EF3X", (weight) => {
  console.log("Weight:", weight, "kg");
});

Optional error callback:

initializeScale(
  "/dev/tty.usbserial-B002EF3X",
  (weight) => {
    console.log("Weight:", weight);
  },
  (err) => {
    console.error("Scale error:", err);
  }
);