ESP32-7in-EPaper-Weather-Station

A weather station based on a Firebeetle ESP32 and a 7.5in Waveshare E-paper display. The data is fetched from Open-Meteo.

Build

Hardware

A KiCad schematic and Fusion 360 design for it's case for this project can be found here.

Software

1. Have PlatformIO installed.
2. Clone the repository.
3. Open in a PlatformIO-compatible IDE because I'm too lazy to remember the commands.
4. Create a Blynk template with a battery percentage (integer from 0 to 100) data stream and widget on virtual pin V0 and a success/fail rate (string) data stream and widget on virtual pin V1 and a failed_refresh event.
5. In include, rename config.sample.h to config.h and fill in values.
6. Build filesystem image.
7. Upload filesystem image.
8. Go to .platformio\packages\framework-arduinoespressif32\libraries\Update\src\Updater.cpp and edit the definition for bool UpdateClass::setMD5(const char* expected_md5):

   bool UpdateClass::setMD5(const char *expected_md5) {
     if (strlen(expected_md5) != 32) {
       return false;
     }
     _target_md5 = expected_md5;
     _target_md5.toLowerCase();  // <-- ADD THIS LINE
     return true;
   }

   Although this issue is fixed in the latest version of the ESP32 Arduino core, PlatformIO is stuck with ESP32 Arduino core v2.
9. Upload.

Contributing

Notes:

• The custom font is a slimmed down version of the GNU Unifont and converted into the u8g2 font with this tool.
• Icons are from QWeather and Bootstrap, converted with ImageMagick to 100x100 bitmaps.
• I modified the GxEPD2 library to support reading B/W pixels from it's framebuffer. This is to upscale the 16x16 fonts into a (blocky) 32x32 font on the fly.