This document discusses using a Raspberry Pi with Node.js and React Native to create an interactive light controlled over WiFi and Bluetooth. It provides code examples for connecting a button to the Raspberry Pi to trigger light patterns. It also summarizes pros and cons of different approaches and libraries for the frontend development.

1. Raspberry Pi
Node.js
React-Native
Interactive Light
Controlled through WIFI / BLE

2. fullstack FRONTEND DEVELOPER
who "will do whatever the fucking job requires”

5. int buttonPin = 3;
// setup initializes serial and the button pin
void setup()
{
beginSerial(9600);
pinMode(buttonPin, INPUT);
}
// loop checks the button pin each time,
// and will send serial if it is pressed
void loop()
{
if (digitalRead(buttonPin) == HIGH)
serialWrite('H');
else
serialWrite('L');
delay(1000);
}
MCU (CPU + Memory)
C++ with Processing
Time-sharing coding
Simple to start, easy to learn
No complex package dependencies
Cheap and low energy
Digital/Analog IO
WIFI, BLE not included

6. INPUT DO SOMETHING OUTPUT
INITIATE
WHILE (1)

7. BUT

8. INPUT DO SOMETHING OUTPUT
INPUT DO SOMETHING OUTPUT
INPUT DO SOMETHING OUTPUT

12. Raspberry pi 3 = RPi b + WIFI + BLE

14. PROS
Node.js / Python
Built-in WIFI, BLE support
A bit expensive but still affordable
GPIO
It’s linux
CONS
3.3V out
Complex setup (wifi, ssh …)
Not cheap
It’s linux man

16. RASPBERRY PI
NODE.JS
REACT-NATIVE

17. RASPBERRY PI
NODE.JS
REACT-NATIVE

18. BOM
Raspberry Pi 3
- Built-in BLE / Wifi
WS281X LED Strip
- NeoPixel
- 1N4001 diode required
https://learn.adafruit.com/neopixels-on-raspberry-pi/wiring

24. THIS IS THE NOGADA

27. RASPBERRY PI
NODE.JS
REACT-NATIVE

28. PACKAGE.JSON
express
rpi-ws281x-native
- ws281x adapter
bleno
- bluetooth low energy package
pi-wifi
- wifi connection handler

29. CODE { }

30. RASPBERRY PI
NODE.JS
REACT-NATIVE

31. PACKAGE.JSON
react-native
- One of the best hybrid app
react-native-ble-plx
- Connect BLE

32. CODE { }

34. JUST IN CASE

37. CONCLUSION

38. PROS
Still easy
More reliable
Better coding experience
CONS
Complex setup
no BLE with iOS simulator
Can’t write test
Don’t forget the sudo

39. https://github.com/team-flit/raspi-light-react-meteor
THE
ORIGIN

40. https://github.com/colus001/raspberry-light

41. PLAN

42. CLOUD GATEWAY
easier to setup
PACKAGING
easier to develop
NO MORE WS281x
easier to wire and light control

44. WE ARE HIRING!
https://streami.co
seokjun.kim@streami.co

45. @
colus001@me.com
seokjun.kim@streami.co
/
seokjun.kr
colus001.github.io
github.com/colus001

46. while(1) {
console.thanks()
}