Python script to display balance and value of a Bitcoin wallet on a 128x32 SSD1306 OLED

btc_wallet_scroller.py

#!/usr/bin/python3

import time
import json
import requests
import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306

from PIL import Image
from PIL import ImageFont
from PIL import ImageDraw

# Raspberry Pi pin configuration:
RST = None
disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)

# Set variables
# replace with your own wallet ID (public key NOT private key)
wallet = "1PXLgcjt2SHtRTCLt1yyoqo69Gv6AocoJA"
balance_url = "https://blockchain.info/q/addressbalance/" + wallet

# Initialize library.
disp.begin()

# Get display width and height.
width = disp.width
height = disp.height

# Clear display.
disp.clear()
disp.display()

# Create image buffer.
# Make sure to create image with mode '1' for 1-bit color.
image = Image.new('1', (width, height))

# Load default font.
#font = ImageFont.load_default()

# Alternatively load a TTF font.  Make sure the .ttf font file is in the same directory as this python script!
# Some nice fonts to try: http://www.dafont.com/bitmap.php
font = ImageFont.truetype('BEBAS.ttf', 15)
line1 = 0
line2 = 16
# Create drawing object.
draw = ImageDraw.Draw(image)

# Animate text moving in sine wave.
#print('Press Ctrl-C to quit.')
while True:
    r = requests.get(balance_url)
    ticker = requests.get("https://blockchain.info/ticker").json()
    btc = int(r.text)/100000000
    price = ticker['GBP']['15m']
    wal_val = btc*price
    text1 = "Bal: " + str(btc) + " BTC."
    #print(text1)
    text2 = "Worth  £" + str('{:7.2f}'.format(wal_val))
    #print(text2)
    draw.rectangle((0,0,width,height), outline=0, fill=0)
    # Enumerate characters and draw them offset vertically based on a sine wave.
    x = 0
    # Line 1 on display
    for i, c in enumerate(text1):
        # Stop drawing if off the right side of screen.
        if x > width:
            break
        # Calculate width but skip drawing if off the left side of screen.
        if x < -10:
            char_width, char_height = draw.textsize(c, font=font)
            x += char_width
            continue
        # Calculate offset from sine wave.
        y = line1
        # Draw text. +math.floor(amplitude*math.sin(x/float(width)*2.0*math.pi))
        draw.text((x, y), c, font=font, fill=255)
        # Increment x position based on chacacter width.
        char_width, char_height = draw.textsize(c, font=font)
        x += char_width
    # Line 2 on Display
    x = 0
    for i, c in enumerate(text2):
        # Stop drawing if off the right side of screen.
        if x > width:
            break
        # Calculate width but skip drawing if off the left side of screen.
        if x < -10:
            char_width, char_height = draw.textsize(c, font=font)
            x += char_width
            continue
        # Calculate offset from sine wave.
        y = line2
        # Draw text. +math.floor(amplitude*math.sin(x/float(width)*2.0*math.pi))
        draw.text((x, y), c, font=font, fill=255)
        # Increment x position based on chacacter width.
        char_width, char_height = draw.textsize(c, font=font)
        x += char_width
    # Draw the image buffer.
    disp.image(image)
    disp.display()
    time.sleep(60)

You can use the BEBAS.ttf font I used, which you can get from here, or you can edit the code to select the default font, I've left it in but commented out.
Thanks to the Adafruit team, whose SSD1306 library I used in this script.