epaper display

A collection of scripts for 7.5" Waveshare e-Ink displays

Required hardware:

• Raspberry Pi Zero W
• Waveshare e-Paper HAT
• 7.5" Waveshare e-Ink display

Included scripts:

• bitcoin.py - shows some Bitcoin info:

  • current price
  • fear & greed index
  • 7 day graph
  • block time
  • moscow time
  • fees

  

• picture.py - loops images in pictures folder

  

• fear_and_greed.py- shows the latest Fear & Greed index gauge as image

  

Interface

The display hosts a small website - open http://epaper to access it.
It will show the current script (and image, if the picture script is active) and links to refresh the display or change the script:

• http://epaper/refresh
  Refreshes the display.
  When the picture script is active, it changes to the next picture.

• http://epaper/flip-the-script
  Changes the current display script and refreshes the display.
  Modify the scripts variable in display/serve.py to adjust included scripts.
  The default scripts are the bitcoin.py and picture.py script.

Setup process:

1. Flash dietpi to an SD card

2. Connect Raspberry Pi with HAT & display, insert SD and boot

3. SSH in with user dietpi

4. In the home folder, clone the Waveshare e-Paper repo:
   git clone https://github.com/waveshare/e-Paper.git

5. Clone this repo or download and extract it to:
   /home/dietpi/e-Paper/RaspberryPi_JetsonNano/python

6. Install additional dependencies:

   • sudo pip3 install cairosvg
   • sudo pip3 install pillow
   • sudo pip3 install requests

7. Setup crontab:

   • crontab -e
   • Add this line: */10 * * * * curl http://localhost/flip-the-script
   • Press Ctrl+X and then Return to save and exit

   This will change the display script every 10 minutes, switching between bitcoin info and picture frame with the default setup.

   To just refresh without changing scripts, use this in crontab:
   */10 * * * * curl http://localhost/refresh

8. Use dietpi-config -> Autostart options -> Custom script (background, no autologin) with this script:

   #!/bin/bash
   
   # DietPi-Autostart custom script
   # Location: /var/lib/dietpi/dietpi-autostart/custom.sh
   
   cd /home/dietpi/e-Paper/RaspberryPi_JetsonNano/python/display
   ./runscript.sh &
   python3 serve.py
   
   exit 0

9. Optional:

   If you have Flic buttons you can use them to refresh the display and change the script.

   A single click will refresh, double click or hold will change the script.

   To set this up, open FlicHub SDK, create a new module, paste this script and start it. Then, connect a button via the app and name it ePaper.

   // main.js
   var buttonManager = require("buttons");
   var http = require("http");
   
   buttonManager.on("buttonSingleOrDoubleClickOrHold", function (obj) {
     var url = "http://epaper"; // put your hostname here if you used a different one
     var button = buttonManager.getButton(obj.bdaddr);
     var clickType = obj.isSingleClick
       ? "click"
       : obj.isDoubleClick
       ? "double_click"
       : "hold";
   
     console.log('pressed button "' + button.name + '": ' + clickType);
   
     if (button.name === "ePaper") {
       switch (clickType) {
         case "click":
           url += "/refresh";
           break;
   
         case "double_click":
         case "hold":
           url += "/flip-the-script";
           break;
   
         default:
           return;
       }
   
       http.makeRequest(
         {
           url: url,
           method: "GET",
         },
         function (err, res) {
           console.log("requested URL: " + url);
         }
       );
     }
   });
   
   console.log("Listening for ePaper button...");