Question 1

How do I connect an ST7735 display to an ESP32 using MicroPython?

Accepted Answer

Follow the pin mapping in the README: VLED to 3V3, RST to IO17, A0 to IO16, SDA to IO13, SCK to IO14, VCC to 3V3, CS to IO18, and GND to GND. Ensure your MicroPython firmware supports SPI and adjust the code initialization based on your display model.

Question 2

MicroPython ST7735 library vs Arduino ST7735: which is better for my project?

Accepted Answer

Choose based on your platform: use MicroPython-ST7735 if you prefer Python syntax and are working with MicroPython devices like ESP32 or Raspberry Pi Pico; opt for Arduino libraries if you're using C++ on Arduino boards. This library is designed to ease porting between the two ecosystems.

Question 3

How to display text on ST7735 with MicroPython?

Accepted Answer

You need to load a font file separately, such as from GuyCarver's repository, then use the library's text rendering functions. The README notes that a font file is necessary and provides links, but no fonts are included in the library itself.

Question 4

Why are colors wrong on my ST7735 display with this driver?

Accepted Answer

The README admits this issue and suggests trying different init functions (e.g., initr to initg) or switching rgb(True) to rgb(False) to correct red and blue pixel order, as display models vary in color configuration.

Question 5

How to load a BMP image on ST7735 using MicroPython?

Accepted Answer

Use a tool like ampy to upload the BMP file to the MicroPython filesystem, then run the tftbmp.py sample code. Ensure the image dimensions match your display resolution, as the library supports BMP files but may have limitations with larger sizes.

Question 6

Can I use this library with Raspberry Pi Pico?

Accepted Answer

Yes, the offscreen-buffer.py example is tested on Raspberry Pi Pico. Check the GitHub issue linked in the README for specific pin connections and verify that your MicroPython build supports the necessary SPI pins for communication.

MicroPython-ST7735

What is MicroPython-ST7735?

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