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README.md

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+![Logo](https://github.com/jonathanrjpereira/Bitcoin-Bar/blob/master/img/Banner-01.svg)
+
+Bitcoin Bar is a physical notfication bar which displays real time Bitcoin data.
+It can display upto 19 different real time Bitcoin data parameters.
+
+Bitcoin Bar runs on a Raspberry Pi & uses a Dot LED Matrix display.
+
+## Prerequisites
+**Hardware:**
+
+ 1. Raspberry Pi 3 or Zero W running Python 2.7 or above
+ 2. Max7219 4in1 Cascaded LED 8x8 Dot Matrix
+
+**Webscraping:**
+
+ 1. Requests is an elegant and simple HTTP library for Python.  [Requests Installation & Documentation](http://docs.python-requests.org/en/master/user/install/) 
+ 2. Beautiful Soup 4 is a Python library for pulling data out of HTML and XML files. [Beautiful Soup Installation & Documentation](https://www.crummy.com/software/BeautifulSoup/bs4/doc/)
+
+**Python Library for Max7219 LED Matrix:**
+
+Python library interfacing LED matrix displays with the MAX7219 driver (using SPI) on the Raspberry Pi. [Installation.](https://luma-led-matrix.readthedocs.io/en/latest/install.html) [ By Richard Hull](https://github.com/rm-hull/luma.led_matrix).
+
+We also developed a new '7seg' font that is a condensed font used for scrolling displays that can only display numerical digits and is compatible with the MAX7219 driver. The 7Seg font allows one to display more digits on a single display unit.  
+
+## Setup & Configurations
+Once all the Prerequisties have been successfully installed, download/clone this GitHub Repository. Connect the Display to the Raspberry Pi as shown in the Schematics. Run the main program `bcbar.py`
+
+Bitcoin Bar can display upto 19 different real time data parameters. These can be configured to be displayed in any order or sequence. 
+The main program displays all 19 data parameters sequentially.
+
+Data parameters can be individually displayed & their order can be changed by congifuring the following line in the main program: 
+
+    show_message(device, disp[i], fill="white", font=proportional(LCD_FONT),scroll_delay = 0.02)
+The value of  `i` will determine the data parameter being displayed.
+
+Bitcoin Bar can display the following real time data parameters:
+
+|Parameter|Example|i|
+|--|--|--|
+|Total Bitcoins in circulation|16,840,363|0|
+|Total Bitcoins to ever be produced|21,000,000|1|
+|Percentage of total Bitcoins mined|80.19%|2|
+|Total Bitcoins left to mine|4,159,638|3|
+|Total Bitcoins left to mine until next blockhalf|1,534,638|4|
+|Bitcoin price (USD)|$8,811.00|5|
+|Market capitalization (USD)|$148,380,433,987.50|6|
+|Bitcoins generated per day|1,800|7|
+|Bitcoin inflation rate per annum|3.98%|8|
+|Bitcoin inflation rate per annum at next block halving event|1.80%|9|
+|Bitcoin inflation per day (USD)|$15,859,800|10|
+|Bitcoin inflation until next blockhalf event based on current price (USD)|$13,521,691,013|11|
+|Total blocks|507,229|12|
+|Blocks until mining reward is halved|122,771|13|
+|Total number of block reward halvings|2|14|
+|Approximate block generation time|10.00 minutes|15|
+|Approximate blocks generated per day|144|16|
+|Difficulty|2,603,077,300,219|17|
+|Hash rate|22.00 Exahashes/s|18|
+
+**Scrolling Speed & Static Text**
+
+By adjusting the value of `scroll_delay`, the scrolling speed can be changed. The `led_test.py`example uses the `text` function to display static text.
+
+**Fonts**
+
+The Python Library for Max7219 LED Matrix by Richard Hull comes with four inbuilt fonts: Sinclair, CP437, LCD, & Tiny. These fonts have different pixel area usage. More fonts may be added in the future & If you require a custom font for a specific purpose, I recommend checking out the GitHub Library.
+
+## Future Updates
+
+ - BTC Conversion to other Currencies
+ - Satoshis & LN
+ - 7 Segment Font 
+
+## Contributing
+
+Are you a programmer, engineer or designer who has a great idea for a new feature in Bitcoin Bar? Maybe you have a good idea for a bug fix? Feel free to grab our code, schematics & CAD files from Github and tinker with it.

bcbar.py

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+# py -2 bcbar.py
+
+# Web Scraping Prerequisites
+import requests
+# LED Matrix Prerequisites
+import re
+import time
+import argparse
+from luma.led_matrix.device import max7219
+from luma.core.interface.serial import spi, noop
+from luma.core.render import canvas
+from luma.core.virtual import viewport
+from luma.core.legacy import text, show_message
+from luma.core.legacy.font import proportional, CP437_FONT, TINY_FONT, SINCLAIR_FONT, LCD_FONT
+
+
+while(1):
+
+    page = requests.get("http://www.bitcoinblockhalf.com/")
+
+    from bs4 import BeautifulSoup
+    soup = BeautifulSoup(page.content, 'html.parser') #Scrapes entire HTML file
+
+
+    data = []
+    for paragraph in soup.find_all('td'):   #Search for all values of td elements
+        data.append(paragraph.string)
+
+
+    disp = [0]*38   #38 is the length of the list data
+    for x in range(len(data)):
+        if x % 2 == 0:
+            disp.append(data[x])
+            if data[x+1] == None:
+                disp.append(data[x+1])
+            else:                
+                disp.append((data[x+1]).replace(',',''))    #Each element of disp is the Name of the parameter & its value. The commas present in the values have been removed for better displaying asthetics
+
+
+    disp = list(filter(lambda a:a != 0, disp)) #For some reason every odd element of the list 'disp' is '0'. This removes all occurences of '0' from the list 'disp'
+    #Remove 'list' in Python2.7
+
+
+    serial = spi(port=0, device=0, gpio=noop())
+    device = max7219(serial, cascaded=4 , block_orientation=-90, rotate=2)
+
+    for i in range(len(disp)):
+        show_message(device, disp[i], fill="white", font=proportional(LCD_FONT),scroll_delay = 0.02) #Change the value of 'scroll_delay' to change the Scrolling Speed
+
+    #show_message(device, disp[4], fill="white", font=proportional(LCD_FONT),scroll_delay = 0.02) # '4' indicates Displays the number of Bitcoins left to mine.
+    #Change this value according to the table to display various data parameters

bitbar.py

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+# py -2 bcbar.py
+
+import requests
+
+# import re
+# import time
+# import argparse
+# from luma.led_matrix.device import max7219
+# from luma.core.interface.serial import spi, noop
+# from luma.core.render import canvas
+# from luma.core.virtual import viewport
+# from luma.core.legacy import text, show_message
+# from luma.core.legacy.font import proportional, CP437_FONT, TINY_FONT, SINCLAIR_FONT, LCD_FONT
+
+
+page = requests.get("http://www.bitcoinblockhalf.com/")
+#print (page.status_code)
+#print (page.content)
+
+from bs4 import BeautifulSoup
+soup = BeautifulSoup(page.content, 'html.parser')
+
+#print(soup.prettify())
+#list(soup.children)
+#print([type(item) for item in list(soup.children)])
+
+#print(soup.find_all('td'))
+
+#for paragraph in soup.find_all('td'):
+#    print (paragraph.string)
+
+data = []
+for paragraph in soup.find_all('td'):
+    data.append(paragraph.string)
+# print (data)
+
+disp = [0]*38
+for x in range(len(data)):
+    if x % 2 == 0:
+        disp.append(data[x])
+        if data[x+1] == None:
+            disp.append(data[x+1])
+        else:                
+            disp.append((data[x+1]).replace(',',''))
+# print (disp)
+
+disp = list(filter(lambda a:a != 0, disp))
+# print (disp)
+
+#coins_2b_mined = (data[7].replace(',','')) #data[1] is the Coins remaining to be Mined. replace() removes the ',' from the string. int() coverts the string into an into
+
+#coins_2b_mined = data[7]  #Valuw with commas does not look neat on Dot Matrix display.
+
+
+# serial = spi(port=0, device=0, gpio=noop())
+# device = max7219(serial, cascaded=4 , block_orientation=-90, rotate=2)
+#
+# show_message(device, data[6] + coins_2b_mined, fill="white", font=proportional(LCD_FONT),scroll_delay = 0.04)
+
+##with canvas(device) as draw:
+##    text(draw, (0, 0), msg, fill="white", font=proportional(LCD_FONT))

img/BannerSmallArtboard 1.svg

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+<svg id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 800"><defs><style>.cls-1{fill:#ee2826;}.cls-2{fill:#fff;stroke:#010101;stroke-miterlimit:10;stroke-width:20px;}</style></defs><title>BannerSmallArtboard 1</title><rect class="cls-1" y="0.7" width="800" height="800"/><circle class="cls-1" cx="401.9" cy="400.4" r="400"/><rect class="cls-2" x="193.3" y="593.4" width="417.1" height="128.66"/><polygon class="cls-2" points="193.3 593.4 610.5 593.4 610.5 593.4 318.4 593.4 318.4 464.7 193.3 464.7 193.3 593.4"/><polygon class="cls-2" points="318.4 336 318.4 207.4 193.3 207.4 193.3 336 471.8 336 471.8 336 318.4 336"/><polygon class="cls-2" points="193.3 464.7 318.4 464.7 471.8 464.7 471.8 336 193.3 336 193.3 464.7"/><rect class="cls-2" x="193.3" y="78.7" width="417.1" height="128.66"/></svg>

led_test.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017-18 Richard Hull and contributors
+# See LICENSE.rst for details.
+
+import re
+import time
+import argparse
+from luma.led_matrix.device import max7219
+from luma.core.interface.serial import spi, noop
+from luma.core.render import canvas
+from luma.core.virtual import viewport
+from luma.core.legacy import text, show_message
+from luma.core.legacy.font import proportional, CP437_FONT, TINY_FONT, SINCLAIR_FONT, LCD_FONT
+
+
+
+# create matrix device
+serial = spi(port=0, device=0, gpio=noop())
+device = max7219(serial, cascaded=4 , block_orientation=-90, rotate=2)
+print("Jonty")
+
+# start demo
+msg = "Jonty"
+print(msg)
+show_message(device, msg, fill="white", font=proportional(CP437_FONT),scroll_delay = 0.04)
+time.sleep(1)
+
+with canvas(device) as draw:
+    text(draw, (0, 0), msg, fill="white", font=proportional(LCD_FONT))
+