Node-red-node-sensortag NPM

node-red-node-sensortag

This node adds support to Node-RED to read from the Texas Instruments SensorTag.

Pre-requisites

You will need a suitable Bluetooth Low Energy (BLE) stack and drivers for your hardware

for example Bluez 5.2.x or better.

Raspberry Pi

Install Bluetooth drivers and bluez stack, and set executable by non-root user

sudo apt-get install libbluetooth-dev libudev-dev pi-bluetooth
sudo setcap cap_net_raw+eip $(eval readlink -f `which node`)

Install

Run the following command in your Node-RED user directory - typically ~/.node-red

npm i node-red-node-sensortag

Usage

The SensorTag is a Bluetooth LE device hosting the following sensors:

Humidity and Temperature
Ambient & IR Temperatures
Barometric Pressure
3 axis Accelerometer
3 axis Gyroscope
3 axis Magnetometer
2 push Buttons
1 Luxometer (CC2650 version only)

The config node allows the user to enable/disable any of the sensors listed above. The readings from these sensors will be sent as a JSON object payload with the sensor name appended to the topic provided:

Humidity - { topic: topic_prefix/humidity , payload: { temp: 21.2, humidity: 88} }
Temperature - { topic: topic_prefix/temperature, payload: { ambient: 21.2, object: 33.0 } }
Barometric Pressure - { topic: topic_prefix/pressure, payload: { pres: 1000 } }
Accelerometer - { topic: topic_prefix/accelerometer , payload: { x:0.0, y:9.8, z:0.0 } }
Magnetometer - { topic: topic_prefix/magnetometer , payload: { x:0.0, y:0.0, z:0.0 } }
Gyroscope - { topic: topic_prefix/gyroscope , payload: { x:0.0, y:0.0, z:0.0 } }
Luxometer - { topic: topic_prefix/luxometer , payload: { lux: 212 } }
Buttons - { topic: topic_prefix/keys , payload: { left: true, right: false} }