shtc3-read

Read temperature and humidity data from shtc3 sensor

1. Introduction

1.1 Shtc3

This guide explains how to create a flow and then use the node Node-RED-contrib-shtc3 to read the data of temperature and humidity from shtc3 sensor. Its pin-map is showed as follows.

1.2 RAK1901

RAK1901 is a WisBlock Sensor that extends the WisBlock system with a temperature and humidity sensor.

2. Preparation

2.1. Hardware

There are two ways to use shtc3 sensor in this example:

• Raspberry Pi 4B + RAK6421 WisBlock Hat + RAK1901

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• Raspberry Pi CM4 + RAK7391 WisGate Developer Connect

  Since the shtc3 sensor is already in RAK7391 board, we no need use another shtc3 sensor.

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2.2. Software

Please install node-red-contrib-shtc3 node with the following commands. If you use docker of Node-RED, you may need to replace ~/.node-red with /usr/src/node-red.

git clone https://github.com/RAKWireless/node-red-nodes.git

cp -rf node-red-nodes/node-red-contrib-shtc3 ~/.node-red/node_modules

cd ~/.node-red/node_modules/node-red-contrib-shtc3 && npm install

3. Run example

Import the shtc3-read.json file into your new flow. Then, the new flow should look like this:

Hit the Deploy button on the top right to deploy the flow.

This is a simple flow with three node, where inject node supply a trigger event every 5 seconds, shtc3_i2cnode read data of shtc3, and debug node print the temperature and humidity read from shtc3 sensor.

The result is as follows:

4. License

This project is licensed under MIT license.