A Node-RED node to read a 1-wire temperature sensor
npm install node-red-contrib-1wirenode-red-contrib-1wire
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A Node-RED node to read a 1-wire DS18B20 temp sensor.
This node uses the built in GPIO pins to read the 1-wire sensor. This must be enabled in the /boot/config.txt using parameters such as:
dtoverlay=w1-gpio,gpiopin=4
Once enabled you should see the sensor information at /sys/bus/w1/devices/
Install
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Run the following command in the root directory of your Node-RED install
npm install -g .
Usage
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Provide the identifier for the 1-wire sensor to read
The msg.topic will contain the sensor identifier
The msg.payload will contain the termpature in degrees C