Published March 23, 2020 © GPL3+

3D Printed Reddit Karma Counter

Raspberry Pi Zero fetches karma and displays it on a cute lil OLED.

IntermediateFull instructions provided624

Things used in this project

Hardware components

Raspberry Pi Zero Wireless

Adafruit - MONOCHROME 0.96" 128X64 OLED GRAPHIC DISPLAY

Adafruit 7 male to female jumper wires

3D printer

white, black, red/orange PLA

Machine Screw, M2

Software apps and online services

Raspberry Pi Raspbian

Hand tools and fabrication machines

Soldering iron (generic)

Hot glue gun (generic)

Story

This was just a little fun side project I thought of which is rather simple and works pretty well to my knowledge. it makes use of some Adafruit libraries along with beautiful soup and urllib to scrap the website.

3D Printing

I printed all of the parts on my Ender 5 so you may need to adjust your settings to best fit your printer. In order to get multiple colors your going to want to follow Devins tutorial over at Make Anything. He does a great job of explaining it and I would recommend checking out the video in order to get multi-colored prints.

Wiring

Believe it or not, the wiring is very simple. you can find a wiring diagram below but here is what you need to connect:

Pi 3.3V to OLED VIN
Pi GND to OLED GND
Pi MOSI to OLED DATA
Pi SCLK to OLED CLK
Pi GPIO4 to OLED RST
Pi GPIO5 to OLED CS
Pi GPIO6 to OLED DC

Raspbian

To start, your going to need Raspbian on your raspberry pi. Everyone has there own methods on how to install it but if you're a complete noob this is a great tutorial for beginners.

Setup

Now we need to install the required libraries. First, we're going to start with Adafruits CircuitPython libraries. Start by executing the following commands in the terminal.

Run the standard updates:

sudo apt-get update

sudo apt-get upgrade

and

sudo pip3 install --upgrade setuptools

If above doesn't work try

sudo apt-get install python3-pip

Next, enable SPI, if you don't know how to here is a 30-second tutorial.

Now we install the libraries:

pip3 install RPI.GPIO

pip3 install adafruit-blinka

Once that's done, from your command line run the following command for the SSD1306 library:

pip3 install adafruit-circuitpython-ssd1306

If your default Python is version 3 you may need to run 'pip' instead. Just make sure you aren't trying to use CircuitPython on Python 2.x, it isn't supported.

Now the Pillow library for displaying images on the oled:

sudo apt-get install python3-pil

If you want to speed up the display a little you can do that by editing the config file.

sudo nano /boot/config.txt

and then add this to the end of the file

dtparam=i2c_baudrate=1000000

then reboot the pi.

Now its time for the code, create a file in your pi directory called karma.py

sudo nano karma.py

Copy and paste the code below then save the file.

Execute the file like so:

python3 karma.py

Crontab

To run the file we've created when the pi is powered on run will need to make use of Crontab.

Start by doing:

crontab -e

Type 1, then enter and add the following line to the bottom of the file

@reboot python3 /home/pi/karma.py &

Now I am aware that my code or methods of doing this may not be the most effective way to do so if you have any suggestions on my code or anything please don't hesitate to tell me. Thank you!

Schematics

Code

Code

import board
import digitalio
from PIL import Image, ImageDraw, ImageFont
import adafruit_ssd1306
import time
import bs4 as bs
import urllib.request

def fetchKarma():
    req = urllib.request.Request('https://www.reddit.com/user/Squiddles1227', 
    headers={'User-Agent': 'Mozilla/5.0'})
    source = urllib.request.urlopen(req).read()

    soup = bs.BeautifulSoup(source, 'lxml')


    for span in soup.find_all('span', id='profile--id-card--highlight-tooltip--karma'):
        newKarma = span.text

    return newKarma

oled_reset = digitalio.DigitalInOut(board.D4)
WIDTH = 128
HEIGHT = 64
BORDER = 5

# Use for SPI
spi = board.SPI()
oled_cs = digitalio.DigitalInOut(board.D5)
oled_dc = digitalio.DigitalInOut(board.D6)
oled = adafruit_ssd1306.SSD1306_SPI(WIDTH, HEIGHT, spi, oled_dc, oled_reset, oled_cs)

# Clear display.
oled.fill(0)
oled.show()

image = Image.new('1', (oled.width, oled.height))
im = Image.open("starFit.ppm").convert('1')

draw = ImageDraw.Draw(im)
font = ImageFont.truetype('/usr/share/fonts/truetype/freefont/FreeSansBold.ttf', 21)

def loadingBar() :
    topX = 0
    topProgress = 0
    while topProgress < 127 :
        draw.point((topX,0), 255)
        oled.image(im)
        oled.show()
        topX += 1
        topProgress += 1
        time.sleep(.1)

        if topProgress == 127 :
            break

    rightSideProgress = 0
    rightSideY = 0
    while rightSideProgress < 64 :
        draw.point((127,rightSideY), 255)
        oled.image(im)
        oled.show()
        rightSideY += 1
        rightSideProgress += 1
        time.sleep(.1)

        if rightSideProgress == 64 :
            break

    bottomProgress = 0
    bottomX = 127
    while bottomProgress < 127 :
        draw.point((bottomX, 63), 255)
        oled.image(im)
        oled.show()
        bottomX -= 1
        bottomProgress += 1
        time.sleep(.1)

        if bottomProgress == 127 :
            break

    leftSideProgress = 0
    leftSideY = 63
    while leftSideProgress < 63 :
        draw.point((0, leftSideY), 255)
        oled.image(im)
        oled.show()
        leftSideY -= 1
        leftSideProgress += 1
        time.sleep(.1)

        if leftSideProgress == 63 :
            break

    # erase bar 

    topX = 0
    topProgress = 0
    while topProgress < 127 :
        draw.point((topX,0), 0)
        oled.image(im)
        oled.show()
        topX += 1
        topProgress += 1
        time.sleep(.1)

        if topProgress == 127 :
            break

    rightSideProgress = 0
    rightSideY = 0
    while rightSideProgress < 64 :
        draw.point((127,rightSideY), 0)
        oled.image(im)
        oled.show()
        rightSideY += 1
        rightSideProgress += 1
        time.sleep(.1)

        if rightSideProgress == 64 :
            break

    bottomProgress = 0
    bottomX = 127
    while bottomProgress < 127 :
        draw.point((bottomX, 63), 0)
        oled.image(im)
        oled.show()
        bottomX -= 1
        bottomProgress += 1
        time.sleep(.1)

        if bottomProgress == 127 :
            break

    leftSideProgress = 0
    leftSideY = 63
    while leftSideProgress < 63 :
        draw.point((0, leftSideY), 0)
        oled.image(im)
        oled.show()
        leftSideY -= 1
        leftSideProgress += 1
        time.sleep(.1)

        if leftSideProgress == 63 :
            break

i = 1
while i < 2 :
    draw.rectangle((54, 20, 128, 64), outline=0, fill=0)
    oled.show()
    draw.text((54, 20), str(fetchKarma()), font=font, fill=255)
    oled.image(im)
    oled.show()
    loadingBar()

3D Printed Reddit Karma Counter

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

3D Printing

Wiring

Raspbian

Setup

Crontab

Custom parts and enclosures

White body

Thingiverse

Red Eyes

Black Body

Back

Schematics

Wiring

Star

StarFit

Code

Code

Credits

Comments

Embed the widget on your own site

3D Printed Reddit Karma Counter

3D Printed Reddit Karma Counter

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

3D Printing

Wiring

Raspbian

Setup

Crontab

Custom parts and enclosures

White body

Thingiverse

Red Eyes

Black Body

Back

Schematics

Wiring

Star

StarFit

Code

Code

Credits

Comments

Related channels and tags