Published January 18, 2018 © GPL3+

Alexa Controlled LEDs Through Raspberry Pi

Alexa-controlled LEDs through Raspberry Pi.

BeginnerFull instructions provided11,547

Things used in this project

Hardware components

Raspberry Pi 3 Model B

Arduino UNO

LED (generic)

Resistor 100 ohm

Breadboard (generic)

Amazon Alexa Amazon Echo

Software apps and online services

Arduino IDE

Node-RED

Story

Introduction

It turns out that it is quite easy to get Alexa communicate with Arduino via Raspberry Pi with Node-RED. All you have to do is installing two Node-RED modules and setup up a Node-RED Flow with Alexa Local and Arduino nodes. Here I have a project which has Alexa turn on and off two LED lights as a demo.

Step 1. Setup Raspberry Pi

Follow this step to get your Raspberry Pi ready.

Step 2. Install Node-RED

Follow this step to install Node-RED.

Step 3. Install the Arduino node

Follow this step to install the Arduino node for Node-RED. I am using Firmata in this project. You need to upload the Standard Firmata to the Arduino Uno, follow this link to accomplish that.

Step 4. Install the Alexa Local

Follow this step to install the Alexa Local Node-RED module.

Step 5. Setup the Node-RED Flow

Import the Node-RED Flow from the code section below.

Testing Time

smart home devices: yellow and green lights

Node-RED flow with Alexa Local and Android nodes

Demo video

Code

noderedflow.js

[{"id":"7cfb7d9e.1371f4","type":"alexa-local","z":"8496b3f6.919b5","devicename":"yellow light","inputtrigger":false,"x":177.10000610351562,"y":175,"wires":[["b9b6f9c0.383058","677a99d9.49b6c8"]]},{"id":"b9b6f9c0.383058","type":"debug","z":"8496b3f6.919b5","name":"","active":true,"console":"false","complete":"true","x":336.10005950927734,"y":233.00000476837158,"wires":[]},{"id":"23e77dc0.c2d532","type":"alexa-local","z":"8496b3f6.919b5","devicename":"green light","inputtrigger":false,"x":157.10000610351562,"y":287,"wires":[["b9b6f9c0.383058","b7bd4e01.3cc47"]]},{"id":"677a99d9.49b6c8","type":"arduino out","z":"8496b3f6.919b5","name":"","pin":"11","state":"OUTPUT","arduino":"4326cda4.263274","x":530.1000633239746,"y":172.6000099182129,"wires":[]},{"id":"b7bd4e01.3cc47","type":"arduino out","z":"8496b3f6.919b5","name":"","pin":"12","state":"OUTPUT","arduino":"4326cda4.263274","x":531.1000366210938,"y":290.6000061035156,"wires":[]},{"id":"4326cda4.263274","type":"arduino-board","z":"","device":"/dev/ttyACM0"}]

Alexa Controlled LEDs Through Raspberry Pi

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Step 1. Setup Raspberry Pi

Step 2. Install Node-RED

Step 3. Install the Arduino node

Step 4. Install the Alexa Local

Step 5. Setup the Node-RED Flow

Testing Time

Schematics

Pi Arduino LEDS breadboard

Code

noderedflow.js

Credits

vincent wong

Comments

Embed the widget on your own site

Alexa Controlled LEDs Through Raspberry Pi

Alexa Controlled LEDs Through Raspberry Pi

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Step 1. Setup Raspberry Pi

Step 2. Install Node-RED

Step 3. Install the Arduino node

Step 4. Install the Alexa Local

Step 5. Setup the Node-RED Flow

Testing Time

Schematics

Pi Arduino LEDS breadboard

Code

noderedflow.js

Credits

vincent wong

Comments

Related channels and tags