inky-cryptochart

CLI tool to display cryptocurrency candlestick chart on Pimoroni Inky pHAT or Waveshare 2.13inch E-Ink display HAT

04b03 freeware font by 04.

Setup

This is the setup for a Raspberry Pi OS (Bullseye) but it should be similar with other systems.

Enable SPI using raspi-config (Interfacing Options > SPI).

Install required dependencies:

sudo apt install git python3-pip python3-dev libatlas-base-dev libopenjp2-7

Inky pHAT display

pip install git+https://github.com/DurandA/inky-cryptochart.git#egg=cryptochart[inky]
cryptochart --driver inky

Wavehsare display

git clone https://github.com/waveshare/e-Paper
cd e-Paper/RaspberryPi_JetsonNano/python && pip install .
pip install git+https://github.com/DurandA/inky-cryptochart.git#egg=cryptochart[waveshare_epd]
cryptochart --driver waveshare_epd

If you have issues, check that you use the correct driver for your display (epd2in13_V2 by default).

Alternatively, you can use the inky driver and redifine the pins on the inky212x104 module:

-RESET_PIN = 27
+RESET_PIN = 17
-BUSY_PIN = 17
+BUSY_PIN = 24
-DC_PIN = 22
+DC_PIN = 25

Add your own driver

If you use a different display, you can easily add your own driver in cryptochart/cli.py by implementing set_image() and show():

class MyDriver():
    def __init__(self, *args):
        pass

    def set_image(self, image):
        # store the image on buffer

    def show(self):
        # draw the image on display from buffer

You also need to adjust width and height (in pixels) in cryptochart/__init__.py to fit the display.

Usage

usage: cryptochart [-h] [--driver {inky,inkyphat,waveshare_epd}] [--pair PAIR]
                   [--flip] [--output OUTPUT]

optional arguments:
  -h, --help            show this help message and exit
  --driver {inky,inkyphat,waveshare_epd}
  --pair PAIR           currency pair (default: XETHZUSD)
  --flip                rotate the display (default: False)
  --output OUTPUT       save plot as png (default: None)

Configure crontab

Use crontab -e to add run the cronjob every 15 minutes:

*/15 * * * * cryptochart --driver inky --pair XETHZUSD

If you are not familiar with cron, have a look at the excellent CronHowto wiki to configure it according to your requirements.

Put you Rasberry Pi in read-only mode

Chances are that you SD card will get quickly corrupted if you unplug your Raspberry Pi without proper shutdown. To prevent this, you can configure the OS for read-only mode.