LILYGO T-Micro32 Plus

Overview

The LILYGO T-Micro32 Plus is an upgraded version of the T-Micro32 ESP32 module, designed for applications where board size is constrained but performance and memory cannot be compromised. Key improvements over the original include an expanded 8 MB flash (double the standard), 2 MB PSRAM for heap-intensive workloads, and a stronger C3 ceramic antenna (red variant) replacing the original white antenna.

GPIO pins have been added to previously reserved pads, increasing the available I/O for custom hardware designs. The 2 MB PSRAM enables applications such as image buffering, complex data structures, and MicroPython with large scripts that would not fit in the ESP32's internal 520 KB SRAM.

Available as single units ($6.54) or in 5-packs ($32.00), the T-Micro32 Plus is well suited for volume deployments in custom IoT hardware and embedded product designs where a compact ESP32 module with good RF performance is needed.

Firmware Compatibility

The T-Micro32 Plus is compatible with Arduino IDE, ESP-IDF, and MicroPython. The added PSRAM is auto-detected by the ESP32 Arduino core when PSRAM support is enabled in board settings. LILYGO's GitHub organization provides pin definitions and example code for the T-Micro32 family.

Flashing Guide

1. Connect an external USB-to-serial programmer (CH9102-based T-U2T recommended).
2. Wire TX, RX, GND, and 3.3V between the programmer and the module.
3. Hold BOOT (GPIO0 to GND) during power-on to enter download mode.
4. In Arduino IDE, select "ESP32 Dev Module," enable PSRAM, and set Flash Size to 8 MB.
5. Select the correct COM port and click Upload.