README.md

Blink LED Example

About

Example lighting control using an LED and Node-Red

Hardware:

• 1 LED
• 2 220ohm resisters

Configuration

Connect the LED as shown below.

• The LED should be connected to pin #11 on the Pi

Running

Start EdgeX

While you can run EdgeX on a RaspberryPi, due to it's limited resources it's best to run the EdgeX services on your PC or another computer.

Use the docker-compose.yaml file provided in this example project to launch an EdgeX stack

docker-compose -f ./examples/Blink/docker-compose.yaml up -d

This file also includes Node Red, which is used later in this example.

Run the device service

Before running device-rpi for this example, you will need to change its configuration.toml to point to the IP address of your RaspberryPi as well as the IP address of your running EdgeX services.

At the top of the file, replace the Host property with the IP address of your RaspberryPi

In the [Clients] section, update the Host properties for Data and Metadata with the IP address of the machine running the EdgeX services you started in the first step.

Then you can start the device-rpi service using using the Blink example:

./build/release/device-rpi --confdir ./examples/Blink

Configure Node-Red

A Node-Red flow is provided for this example, you will need to load it into your instance.

1. Open http://localhost:1880/ on the the machine running your EdgeX services (or replace localhost with that machine's IP address)

2. Import the example Node-Red configuration by copy/pasting the provided blinkr_flow.json file into your instance:

3. Click the Deploy button at the top of your Node-Red screen to start your flow

Testing

You will now have a Node-Red dashboard at http://localhost:1880/ui/ where you can control the LED on your board.