node-red-contrib-keyvalue-r2

Node-RED nodes for reading and writing key-value pairs in a JSON file.

Installation

Install using the Node-RED Palette Manager or by running the following command in your Node-RED user directory (typically ~/.node-red):

npm install node-red-contrib-keyvalue-r2

Nodes

This package includes two nodes:

• keyvalue-read: Reads a value from a JSON file based on the key provided in the input message payload.
• keyvalue-write: Writes a key-value pair to a JSON file. The input message should contain the key in the topic and the value in the payload.

Usage

1. Drag and drop the keyvalue-read or keyvalue-write node into your Node-RED flow.
2. Double-click the node to open the configuration panel.
3. Enter the JSON file path where the key-value pairs will be stored or retrieved.
4. Connect the nodes as required in your flow.

For the keyvalue-read node, the input message should contain the key in the payload, and the output message will have the value in the payload.

For the keyvalue-write node, the input message should contain the key in the topic and the value in the payload.

License

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for details.