Freenove ESP32 Display

Freenove ESP32 Display Models

At the time this tutorial was written, Freenove ESP32 Display is available in six different models. While they may vary in drivers, resolution, or screen size, this guide applies to all of them. Below is a list of the supported models, along with corresponding images:

Models	Specifications		Images
FNK0114A_2P4	Size	2.4inch
	Resolution	240x320
	Driver	ST7789
FNK0114B_2P8	Size	2.8inch
	Resolution	240x320
	Driver	ST7789
FNK0114F_2P8	Size	2.8 inch
	Resolution	240x320
	Driver	ILI9341
FNK0114L_3P2	Size	3.2inch
	Resolution	240x320
	Driver	ST7789
FNK0114N_3P5	Size	3.5inch
	Resolution	320x480
	Driver	ST7796
FNK0114S_4P0	Size	4.0inch
	Resolution	320x480
	Driver	ST7796

Related Knowledge

Screen Size

An internationally recognized unit of length, the inch (equivalent to 2.54 centimeters) has been the standard measurement for screen sizes in the display industry with a long history. This convention originated in the early television era when British manufacturers first adopted inches to measure cathode-ray tube (CRT) dimensions. The practice quickly became the global norm and remains the industry standard today.

A critical clarification: screen size always refers to the diagonal measurement of the display panel. For instance, a 4-inch display features a 4-inch (10.16 cm) diagonal, ensuring standardized and comparable sizing across all devices.

Resolution

Screen resolution quantifies a display’s pixel density along its horizontal and vertical axes, expressed as width × height (e.g., 320 × 480). This specification applies universally across displays, such as smartphones, monitors, and television screens.

• Pixel: The smallest unit of a display, composed of red (R), green (G), and blue (B) subpixels. Through precise brightness variation, these subpixels generate the complete color spectrum.

• Resolution vs. Clarity: Higher resolution means more pixels per unit area, resulting in sharper and more detailed imagery.

Display Driver

The display driver IC serves as the core component of display panels, processing signals from the main controller and controlling pixel illumination. Below is an overview of three widely used display driver ICs.

Display Driver IC	Resolution	Advantages
ILI9341	240x320	widely used with abundant resources available
ST7789	240x320 or 240x240	Suitable for learning and development
ST7796	320x480	High-definition display with richer colors