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JavaScript and the Internet of Things

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Client-Host Model

2:09 with Andrew Chalkley

The final strategy is to use the client-host model.

JavaScript Runtimes

Microcontroller Software

Examples of Microcontrollers

Examples of Single Board Computers

JavaScript Frameworks

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    The last strategy for 0:00
    JavaScript in the Internet of Things is the Client-Host model. 0:01
    This is where you install software on a microcontroller that waits for 0:05
    instructions from a more powerful computer. 0:09
    To get yourself up, you need a microcontroller with specialized software 0:12
    flashed to the device. 0:16
    The most common is Firmata. 0:17
    Secondly, you need the host computer running Node.js that 0:19
    talks using the Firmata protocol and tells the microcontroller what to do. 0:23
    One of the most common microcontroller bolts is the Arduino Uno. 0:28
    Computers communicate with the UNO, the A USB. 0:32
    The Arduino 101 has a Intel Bluetooth chip inside 0:35
    which enables you to talk wirelessly to the device. 0:40
    Firmata can be also flashed to the ESP 8266, and can talk over Wi-Fi. 0:44
    The host computer running Node.js doesn't have to be a laptop or desktop. 0:50
    It could be a single board computer like the Raspberry Pi. 0:55
    In addition to Node.js, you need a framework that can speak Firmata. 0:58
    Johnny-Five and Cylon.js are two libraries that can do just that. 1:02
    The pros of the Client-Host model is that you're getting the best of both worlds. 1:08
    For example, you can do computer vision 1:13
    because you have the power of a general purpose computer. 1:16
    You get faster IO from the microcontroller devices. 1:19
    And you can use a modern workflow with MPM, 1:23
    a package.json file to manage dependencies and an editor of your choice. 1:26
    It's also great for robotics, where you may require a more sophisticated brand, 1:31
    the general purpose computer, and the more responsive IO from the microcontrollers. 1:36
    The cons are because you're using more than one device, 1:41
    there are more points of failure and attack, is more expensive. 1:45
    But if you're doing a robotics project, you may be fine. 1:48
    But if you're doing a few simple tasks, it's a bit over-engineered. 1:51
    You may be okay with just using a microcontroller. 1:55
    Hopefully, this is given you some ideas on what strategies to use and 1:59
    when you'd want to use them. 2:03
    Let me know what you're going to build with JavaScript and 2:05
    the Internet of Things. 2:08

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