https://github.com/hubmartin/rpi-epaper

Raspberry Pi e-paper python script to display image sent over SSH
https://github.com/hubmartin/rpi-epaper

epaper raspberry-pi rpi waveshare

Last synced: 3 months ago
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Raspberry Pi e-paper python script to display image sent over SSH

• Host: GitHub
• URL: https://github.com/hubmartin/rpi-epaper
• Owner: hubmartin
• Created: 2021-08-20T20:48:56.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-12-08T12:20:59.000Z (about 3 years ago)
• Last Synced: 2024-10-13T02:14:33.261Z (4 months ago)
• Topics: epaper, raspberry-pi, rpi, waveshare
• Language: Python
• Homepage:
• Size: 4.61 MB
• Stars: 9
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Raspberry PI e-paper network display

Create a screenshot of a webpage on your server and send it over SCP to the Raspberry Pi to display on the screen or e-paper

## Usage

The project has `/server` an `/client` part/folders.

Server should run on your home server, client part is run on the Raspberry Pi where your ePaper is connected.

## Server

```

cd ~

git clone https://github.com/hubmartin/rpi-epaper.git

cd rpi-epaper

```

Use `/server/display.py` file to load a webpage with Selenium headless web browser, create a PNG image and send it to the device IP.

The script is using data from czech webserver for Czech Republic. You'll probably need to completely rewrite this script or find other weaher service which fits all data nicely on single small screen.

You can set `crontab` to periodically every 15 minute update screen

```

crontab -e

```

Then add this line:

```

*/15 * * * * ~/rpi-epaper/server/display.py

```

## Rpi Client install steps

Client part waits for `client/image.png` to change, then it reloads picture to the epaper.

You can run `client/epaper.py` which is the main script. Or use steps below to install it completely.

```

sudo raspi-config #enable SPI

sudo apt update

sudo apt install git python3-pip libopenjp2-7 libtiff5

pip3 install --upgrade setuptools

sudo pip3 install netifaces Pillow watchdog

cd ~

git clone https://github.com/hubmartin/rpi-epaper.git

# Systemd to start client service after boot

sudo cp rpi-epaper/client/epaper.service /etc/systemd/system

sudo systemctl daemon-reload

sudo systemctl start epaper.service

sudo systemctl enable epaper.service

```

## Raspberry Pi Zero W issues with WaveShare Smart Reset

WaveShare driver assumes that Python is realtime, which is not. So slow Rpi Zero sometimes does longer reset pulse and that causes power disconnect. I did some hardware modifiations. Also it wires 5 V directly to 3.3V GPIO which this hardware modification also fixes.

you may be running fine, but time from time when the Python script is run as a background service (with probably lower priority) and wireless transfer the Rpi has no time to generate precise Python pulses.

https://www.martinhubacek.cz/blog/waveshare-epaper-hat-issues/