faytor / open_lcd_assistant

Open LCD Assistant is a tool to convert bitmap images into byte arrays that can be used in monochrome OLED or LCD displays

Open LCD Assistant

Contents

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• General Info
• Usage
• Dependency
• Test
• Todo
• References

General Info

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I have been looking for a tool to convert bitmap images into byte arrays that can be used in monochrom OLED or LCD displays. The best known tool I found to perform this task is LCD Assistant but it works only on Windows. So I had to write something similar that can be used in MacOS, Linux or even Windows. You can gess whay I called it Open LCD Assistant :)

Usage

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Dependency

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To make the script work, you must install the following modules:

Pillow, for image manipulation module:

pip install Pillow

PyQt5, a framework for gui development

pip install PyQt5

NumPy package for array computing

pip install numpy

Or, more simply by using the following command, all the dependencies will be installed automatically

pip install requirements.txt

Test

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The program has been tested in Horizontal mode and only with u8g2 library

• Software

  • Arduino IDE
  • u8g2 Library

• Hardware

  • Heltec WiFi LoRa 32(V2)

• Test code

  • Use the arduino code arduino_ug82_code example

• Test result

  

• Test Inversion of the Adafruit's Logo

Todo

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• Add a Checkbox to give the user the possibility to invert the image colors
• Generate dmg and exe files

References

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Some useful references used to write this program:

• Displaying an image using PyQt5 in Python
• xbm editor
• image2cpp
• stackoverflow