⚡IND400 with API
In this tutorial, we continue exploring the Mettler Toledo IND400 Smart Weighing Indicator, focusing on how to utilize the REST API and WebSocket interfaces to access real-time weighing data.
📺 Video Tutorial
Smart Weighing with MQTT- IND400 in ACTION
The Mettler Toledo IND400 is a smart weighing indicator designed for industrial applications. It supports modern protocols such as MQTT, OPC UA, and Ethernet/IP, making it IIoT-ready for digital factories.
🔑 What you’ll learn
How to log in and authenticate with the IND400 using the REST API
Sending GET/POST requests to read and write data
Understanding the difference between REST (request/response) and WebSocket (real-time streaming) communication
Setting up a WebSocket connection to continuously receive live weighing data
Demo: Visualizing the data in Node-RED
⚙️ Example REST API Request
Response (with access token):
🌐 WebSocket Example
Global variables defined in POSTMAN:
Connection URL:
Once connected, the IND400 continuously streams real-time weight values.
📊 Applications
Real-time monitoring of weighing processes
Continuous data logging into databases or historians
Feeding streaming data into dashboards, MES, or cloud platforms
Seamless integration with IIoT and Industry 4.0 architectures
Key notes:
Node-RED Example Code
The Node-RED flow used in the video can be found in the GitHub repository mentioned below:
♥️ Work With Me
I regularly test industrial automation and IIoT devices. If you’d like me to review your product or showcase it in my courses and YouTube channel:
📧 Email: [email protected] or drop me a message on LinkedIn
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