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Dan at Kilomon is a Systems Engineer with years of experience in datacenter infrastructure and cloud deployment, management, automation, and optimization.

Dan is blogging on his daily work and hobbies he enjoys.

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Creating Alexa Skills for IoT and Nodemcu - Part 2 AWS IoT

Connecting Nodemcu to AWS IoT This is part two of a series of posts showing how I setup a AWS based solution to allow Alexa to read data collected by Nodemcu with DHT temperature and humidity sensors. The design is discussed in part one of this series. Go to Part 1 - Design Overview I recommend reviewing my first post in this series, so you can understand the gameplan... but here's the short version. We will create and configure three separate services in AWS. An Alexa Skill for voice commands, a AWS Lambda function that will act as a middle man, and AWS IoT for storing the current state of the Nodemcu sensors. DISCLAIMER: This guide uses a work around to allow Nodemcu to communicate directly with AWS IoT. The work around uses API keys that will be written in cleartext on the Nodemcu. Proceed at your own discretion. Goals Configure an IoT Thing Setup a security policy and user that can write data to the Thing Shadow via the REST API Ensure the policy limits ac...

Hacking the Sonoff Wifi Switch - Part 3 Alexa Smart Home

Controlling Sonoff with Alexa This post will build our previous work with the Sonoff Wifi Switch. We'll focus on using an Arduino library called fauxmo to allow Alexa to interact with the Sonoff. Go to Part 1 Go to Part 2 Overview I have been controlling appliances such as lights and aquaponics equipment using MQTT with Node-RED and also Blynk. Both work well. When I recieved an Echo Plus as a gift for Christmas I quickly understood the potential that the Alexa service had. It is simple to use and for those of us that like getting under the hood, functional short comings can be overcome with the creation of Alexa Skills and some type of internet accessible service to handle logic and automation (AWS Lambda, Node-RED, etc). Echo Dot can be had a reasonable price currently. You can also keep tabs on the Alexa development pages. They have been giving out Echo Dot's to Skill creators that meet certain criteria. This guide will use the FauxmoESP library ...

Creating Alexa Skills for IoT and Nodemcu - Part 1 Design

Let's Make Alexa Interact with Nodemcu In this post I will we create a solution that allows Alexa to read sensor data collected by a Nodemcu and a DHT11/DHT22 sensor. Go to Part 2 Overview I collect temperature and humidity data with Nodemcu and DHT11/DHT22 sensors throughout my house. I have been storing the data in Graphite , which is a proven time-series database solution. Graphite is traditionally used in the context of monitoring IT systems such as server and application performance. I visualize the sensor information with Grafana . This is great for me, but let's say my wife wants to know the temperature in our daughter's room... I would quickly learn that what seems great to me does not create a simple experience for others. So how would I go about making a method that my wife would actually use? My answer is Alexa. I will use a the inexpensive ESP8266 based Nodemcu and a DHT11 or DHT22 sensor to collect temperature and humidity data. We will use ...