Node-RED Handshake Node

This Node-RED contrib node, node-red-contrib-handshake-node, implements a robust handshake mechanism. It's designed to manage communication processes between Node-RED and Control Logic Device handling communication failure states efficiently.

Note - Users should implement handshake logic in the Controller for this node to work properly

Author

Harshad Joshi

Features

• Alternating input expectation (true/false).
• Configurable delay for response timeouts.
• Customizable initial state and maximum failure tolerances.
• Automatic transition to a failure state upon consistent non-receipt of expected inputs.
• Easy integration into existing Node-RED flows for enhanced communication handling.

Installation

You can install this node directly from your Node-RED environment or by using npm:

Node-RED Palette

1. Open your Node-RED instance.
2. Go to the Menu -> Manage Palette -> Install.
3. Search for node-red-contrib-handshake-node and install.

NPM Installation

In your Node-RED directory (typically ~/.node-red), run:

npm install node-red-contrib-handshake-node

After installation, the node will be available in your Node-RED palette.

Usage

Drag and drop the handshake-node into your flow. Double-click on the node to configure its properties:

• Name: Assign a unique name for identification.
• Delay (ms): Time in milliseconds before the node enters a failure state if the expected input is not received.

Input

• Expects true or false inputs.

Output

• Toggles and outputs the opposite of the received input.
• Sends a failure message if the expected input is not received within the specified time.

Contributing

Contributions are welcome. Please open an issue or submit a pull request with your suggested changes.

Support

For support or to report issues, please visit the GitHub Issue Tracker.

License

This project is licensed under the GNU General Public License v3.0 (GPL-3.0). See the LICENSE file for more details.