Introduction

Jiotty is a library of java components aimed at home automation (IoT) enthusiasts who prefer to solder, assemble and code it all themselves as opposed to using one of existing automation hub solutions. This gives them 100% flexibility in all the automation tasks.

Structure

Jiotty consists of a number of small independent modules. Each module typically allows communication with a single Thing, for example, Google Drive, a thermostat or a smart plug.

Design principles

I am a fan of Google Guice as a dependency injection framework, a clearly visible point of entry to every API and good encapsulation. A a result, an entry point to any component is the corresponding Guice module. If your application is not using Guice (wait but why?), use the following pattern to obtain an instance of any component:

ExposedKeyModule<ComponentType> module = ComponentModule.builder()
    .setXxx()
    .build();
ComponentType component = Guice.createInjector(module).getInstance(module.getExposedKey());

Many components internally implement LifecycleComponent interface. Such components expect their start() method to be called on application startup and their stop() method to be called on application shutdown. A great way to manage that is to use the Application class that takes care of starting and stopping all the components. If you don't want to do that, you will have to perform this additional step on you application startup:

module
    .findBindingsByType(new TypeLiteral<LifecycleComponent>() {})
    .stream()
    .map(binding -> binding.getProvider().get())
    .forEach(LifecycleComponent::start);

and then on application termination call stop() on the same components in reverse order. Refer to the source code of Application as an example.

Getting started

Start by including the required net.yudichev.jiotty maven module into your project. For example, to work with a TP-Link smart plug, use this maven dependency:

<dependency>
    <groupId>net.yudichev.jiotty</groupId>
    <artifactId>jiotty-connector-tplinksmartplug</artifactId>
    <version>1.0.0</version>
</dependency>

Quality

At the moment most of the code is used in my home automation scenarios, so I have good confidence in its quality. However, only a small part of the code is unit tested and none is documented. I am actively working on this.

Components

jiotty-appliance

Use this module to implement an appliance - something that can be turned on or off, or receive other commands, such as increasing or decreasing volume.

jiotty-connector-aws

An higher abstraction over Amazon IoT MQTT messaging.

TODO document them all