https://github.com/coderbyheart/iot-proto-js

Source code examples used in my presention on Prototyping products for the Internet of Things using JavaScript
https://github.com/coderbyheart/iot-proto-js

Last synced: 2 months ago
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Source code examples used in my presention on Prototyping products for the Internet of Things using JavaScript

• Host: GitHub
• URL: https://github.com/coderbyheart/iot-proto-js
• Owner: coderbyheart
• License: mit
• Created: 2018-05-13T16:27:44.000Z (over 7 years ago)
• Default Branch: saga
• Last Pushed: 2019-03-12T16:48:14.000Z (almost 7 years ago)
• Last Synced: 2025-10-09T01:09:19.084Z (2 months ago)
• Language: JavaScript
• Size: 63.5 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# Prototyping products for the Internet of Things using JavaScript

Source code examples used in my presention on Prototyping products for the Internet of Things using JavaScript

## NFC Card Reader Example

This example uses an the [Adafruit PN532 NFC/RFID controller breakout board](https://www.adafruit.com/product/364).

Connect `SCL` on the reader to the `B6` pin of the Espruino.   

Connect `SDA` on the reader to the `B7` pin of the Espruino.  

Connect `5V` on the reader to the `5V` pin of the Espruino (left of the `3.3V`).  

Connect `GND` next to the `SCL` pin on the reader to the `GND` pin of the Espruino.

![NFC wiring](https://farm1.staticflickr.com/977/28425769188_4765503bc3_k_d.jpg)

## Display Example

The example uses three [Adafruit Mini 8x8 LED Matrix w/I2C Backpack](https://www.adafruit.com/product/870).

They are hooked in parallel:

![Display Wiring](https://farm1.staticflickr.com/902/41407730335_514b9c5e40_k_d.jpg)

The second display has the `A0` jumper soldered (so it has the address `0x71`),

The third display has the `A1` jumper soldered (so it has the address `0x72`).

I use a free MQTT broker from [cloudmqtt.com](https://www.cloudmqtt.com/), copy the file [`./display/cloudmqtt.com/.env.dist`](./display/cloudmqtt.com/.env.dist) to `./display/cloudmqtt.com/.env` and enter your details.

Now you can run `node client.js` in the `./display/cloudmqtt.com` folder.