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eInkButtons.py
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eInkButtons.py
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#!/usr/bin/python
# Install the following: (Python 3)
# 1) https://github.com/PiSupply/PaPiRus
# 2) blockchain.info
# >sudo pip install blockchain
# 3) Blockchain python rpc (optimized for blockchain)
# >sudo pip install python-bitcoinrpc
# 4) Simple JSON
# >sudo pip install simplejson
import os
import sys
import time
import datetime
import RPi.GPIO as GPIO
import urllib2
import json
import simplejson
from papirus import Papirus
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
from blockchain import statistics
user = os.getuid()
if user != 0:
print "Please run script as root"
sys.exit()
# Command line usage
# papirus-buttons
WHITE = 1
BLACK = 0
SIZE = 22
SW1 = 16
SW2 = 26
# My GPIO 20 is Dead on my rPi
SW3 = False
SW4 = 21
defaultText = "[4] [3] [2] [1] ***************\n[1]: Bitcoin*****\n[2]: Litecoin****\n[4]: Shutdown rPi"
def main():
GPIO.setmode(GPIO.BCM)
GPIO.setup(SW1, GPIO.IN)
GPIO.setup(SW2, GPIO.IN)
GPIO.setup(SW3, GPIO.IN)
GPIO.setup(SW4, GPIO.IN)
papirus = Papirus()
write_text(papirus, defaultText, SIZE)
while True:
if GPIO.input(SW1) == False:
stats = statistics.get()
btcBlockHeight = stats.total_blocks
# The blockchain api returns bits, need to convert to kB
btcBlockSizeCleaned = (stats.blocks_size)/125000
write_text(papirus, "%s --BITCOIN--\nBlockheight:%d \nBlocksize : %d kB" % (todayCleaned(), btcBlockHeight,btcBlockSizeCleaned), SIZE)
time.sleep(10)
write_text(papirus, defaultText, SIZE)
if GPIO.input(SW2) == False:
responseBlockr = urllib2.urlopen("http://ltc.blockr.io/api/v1/coin/info")
htmlResponse = simplejson.load(responseBlockr)
ltcBlockHeight = int(htmlResponse["data"]["last_block"]["nb"])
write_text(papirus,"%s --LITECOIN--\nBlockheight:%d" % (todayCleaned(), ltcBlockHeight), SIZE)
time.sleep(10)
write_text(papirus, defaultText, SIZE)
if GPIO.input(SW3) == False:
write_text(papirus, "Three", SIZE)
time.sleep(10)
write_text(papirus, defaultText, SIZE)
if GPIO.input(SW4) == False:
write_text(papirus, "Shutdown Begun \nCheers!", SIZE)
time.sleep(2)
write_text(papirus, "",SIZE)
shutdown()
#time.sleep(10)
#write_text(papirus, defaultText, SIZE)
time.sleep(0.1)
def todayCleaned():
today = datetime.datetime.today()
todayCleaned = time.strftime("%A %I:%M %p")
return todayCleaned
def shutdown():
os.system("shutdown -h now")
def write_text(papirus, text, size):
# initially set all white background
image = Image.new('1', papirus.size, WHITE)
# prepare for drawing
draw = ImageDraw.Draw(image)
font = ImageFont.truetype('/usr/share/fonts/truetype/freefont/FreeMono.ttf', size)
# Calculate the max number of char to fit on line
line_size = (papirus.width / (size*0.65))
current_line = 0
text_lines = [""]
# Compute each line
for word in text.split():
# If there is space on line add the word to it
if (len(text_lines[current_line]) + len(word)) < line_size:
text_lines[current_line] += " " + word
else:
# No space left on line so move to next one
text_lines.append("")
current_line += 1
text_lines[current_line] += " " + word
current_line = 0
for l in text_lines:
current_line += 1
draw.text( (0, ((size*current_line)-size)) , l, font=font, fill=BLACK)
papirus.display(image)
papirus.update()
if __name__ == '__main__':
main()