node-red-contrib-sht

This node for Node-RED provides easy access to read temperature and humidity values from the Sensirion SHT31 or SHT35 sensors.

Requirements

• Raspberry Pi
• I2C must be enabled
• Sensirion SHT31 or SHT35 sensor
• Node.js v7.6 or newer
• sht31-node from Thomas Bouvier

Installation

Prereqeuisites

# Run this in your favourite terminal
npm install sht31-node

Highly recommended: Run the Node-Red specific bash script for the Raspberry Pi followed by

npm rebuild
npm update

Installation of node-red-contrib-sht

Just install this module in your node-RED configuration folder

cd ~/.node-red
npm install node-red-contrib-sht

Or globally:

npm install -g node-red-contrib-sht

Usage

You will find this node in the i2c bus section of the palette panel or just filter the nodes for "sht".

The msg.payload of the outgoing object will be a object with the key names temperature and humidity and the values, e.g. { "temperature" : 21.9, "humidity" : 37,5 }. Temperature value unit is in °C, humidity in %RH.

The queried I2C address of 0x44 is changable.

Contributing

1. Fork it
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add new feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request

Credits

This is just a very basic and simple Node-RED wrapper for Thomas Bouviers excelent sht31-node Node.js library. He deserves all credits.

License

MIT