Bob Hammell rhammell

Making a Reddit Upvote Notifier

The Arduino Yún's ability to connect to the Internet introduces many new possibilities to traditional Arduino development, such as capturing data from the web and making use of it inside of a sketch.

This project will demonstrate this ability by monitoring the number of upvotes accrued by a Reddit comment thread and alerting the user when new upvotes are added.

Many companies offer application programming interfaces (APIs, for short) that allow third-party programs to access their data. Reddit, for example, provides an API that gives detailed information and statistics for posts, comment threads, and users.

This project uses a Python script on the Yun's Linux side to read the current upvote count from a comment thread using Reddit's API. A skech running on the Arduino side will track this number and display a notification message on an LED matrix every time a new vote is added.

label	value1	value2
Label A	9661	502762091
Label B	10767	752485322
Label C	5698	500227050
Label D	7324	262195449
Label E	3885	102223166
Label F	2603	95522280
Label G	1149	20167556
Label H	1502	11810268
Label I	1079	23298055

	date	close
	24-Apr-07	93.24
	25-Apr-07	95.35
	26-Apr-07	98.84
	27-Apr-07	99.92
	30-Apr-07	99.80
	1-May-07	99.47
	2-May-07	100.39
	3-May-07	100.40
	4-May-07	100.81

	import time
	import random
	import board
	import displayio
	import fourwire
	import adafruit_ili9341
	import pwmio

	# Create display
	displayio.release_displays()

	body {
	color: #333;
	font-family: "PT Sans", sans-serif;
	}

	#main {
	width: 960px;
	margin: 2em auto 4em auto;
	}

	<!DOCTYPE html>

	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Crypto Trades</title>
	<link rel="stylesheet" href="css/main.css">
	</head>

	<body>

	import json
	import time
	import requests
	from datetime import datetime
	import RPi.GPIO as GPIO


	class FlowMeter():
	''' Class representing the flow meter sensor which handles input pulses
	and calculates current flow rate (L/min) measurement

	''' Get historic crypto price data using the GDAX API '''

	import time
	import datetime
	import json
	import gdax

	# Create gdax client
	client = gdax.PublicClient()