ILI9341

2 articles

Rust 19 Sep 2026 8 min read

Streaming Sensor Graphs to ILI9341 Without a Framebuffer on ESP32-C3

An ILI9341 panel is large enough for a useful live sensor graph, but a 240 × 320 RGB565 framebuffer costs 153,600 bytes: 240 * 320 * 2 bytes = 153,600 bytes That is a poor default allocation on a small microcontroller when the graph itself may need only a few hundred samples. The display controller already contains its own graphics RAM. An ESP32-C3 can therefore treat the panel as the destination, keep only the application state it needs, and send changed pixels over SPI.

Rust ESP32-C3

Tech 19 Sep 2026 6 min read

Driving an ILI9341 SPI Display and Touch Controller from ESP32-S3

A 2.4-inch 240 × 320 TFT module built around the ILI9341 is a practical match for an ESP32-S3 because the display controller accepts a serial SPI interface. The module is not necessarily one device: a typical board can contain the ILI9341 for pixels, a separate resistive-touch controller, and sometimes a microSD socket. That distinction determines the wiring. The devices may share SPI clock and data lines, while each peripheral keeps its own chip-select signal.

ESP32-S3 ILI9341