LEARNING NOTES
Approved English build notes, page 2.
A GMT130-V1.0 had a working backlight but never displayed a single pixel, even though the driver chip and resolution were correct. This article retraces how I moved from a black screen on software SPI Mode 0 to hardware SPI that actually applies SPI_MODE3, then verified the fix with a five-color loop and a power-cycle test.
For my first time soldering pins onto an INMP441, I skipped the practice board and went straight to the real thing. Twenty minutes later, I had six oddly shaped solder joints. This failure taught me: tutorials and AI can teach knowledge, but hands-on skill only grows from practice.
A 1.8-inch 128×160 ST7735 can already display the main content, but fixed colored lines remain on the right and bottom. This article uses a single-variable hands-on test to show how to identify initialization parameter mismatch from image offset, and verifies whether INITR_GREENTAB fits the current panel.
I thought that once I bought all the components for the ESP32-S3, I could just wire them up and debug; it was only when the microphone lacked soldered pins and the speaker terminal couldn't match that I understood AI can speed up problem-solving but cannot replace the foundation and judgment formed through practice.
