# LILYGO T-Lion

> ESP32-WROVER development board with 0.96-inch OLED display, five-way directional button, single 18650 battery holder, 8MB PSRAM, WiFi, and BLE 4.2 — a compact handheld IoT controller in a slim form factor.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$11.23
- **Product Readiness:** developer
- **CPU:** ESP32
- **CPU Architecture:** Xtensa LX6
- **CPU Cores:** 2
- **RAM:** 520KB SRAM
- **PSRAM:** 8MB
- **Flash:** 4MB
- **USB:** Micro-USB
- **Power:** 5V + Li-Ion 18650
- **Operating Voltage:** 3.3V
- **Battery:** 18650 (user-supplied)
- **Charging Port:** Micro-USB
- **Display:** 0.96" OLED 128x64

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 4.2

## Open Source

- **Firmware:** No
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

arduino, esp-idf, micropython

## Use Cases

- portable-iot-controller
- battery-powered-sensor-node
- handheld-display-device
- field-data-logger

## Components

- **ESP32-WROVER** (mcu): ESP32-WROVER with 4MB flash, 8MB PSRAM, 240MHz dual-core, WiFi and BLE 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **SSD1306** (display): 128x64 monochrome OLED display driven by SSD1306 via I2C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **5-Way Button** (input): Multi-directional (up/down/left/right/press) navigation control for menu-driven interfaces — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)
- **CH9102** (usb-serial): USB to serial converter for programming and battery charging at 5V/1A — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fproducts%2FCH9102.html&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **I2S**

## Available Software

- **[Arduino IDE]()** (open-source)
- **[ESP-IDF]()** (open-source)
- **[MicroPython]()** (open-source)

## Description

## Overview

The LILYGO T-Lion (also known as T-Controller) is an ESP32-WROVER-based development board combining a 0.96-inch SSD1306 OLED display with a five-way navigation button in a narrow 108.51mm × 29.01mm profile. It carries 4MB SPI flash, 8MB PSRAM, and a dedicated 18650 battery holder with a BAT switch for portable operation. USB charging at 5V/1A through a CH9102 USB-to-TTL chip handles both programming and battery top-up. The ESP32 provides WiFi 802.11 b/g/n (up to 150Mbps) and Bluetooth 4.2 BR/EDR plus BLE for wireless connectivity. All standard ESP32 interfaces — UART, SPI, I2C, ADC, DAC, PWM, I2S — are accessible via pin headers, making it suitable for handheld sensor displays and portable IoT projects.

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lion&ref=openhardware.directory&product=lilygo-t-lion&source=md-export) — $11.23

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-lion&ref=openhardware.directory&product=lilygo-t-lion&source=md-export)

## Tags

`esp32`, `oled`, `battery`, `18650`, `portable`, `controller`

## Images

![LILYGO T-Lion](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-lion/aee52b40d11b.jpg)
![LILYGO T-Lion](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-lion/612fa895b79d.jpg)
![LILYGO T-Lion](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-lion/100a4a6cb70c.jpg)
![LILYGO T-Lion](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-lion/88b4d7cee513.jpg)
![LILYGO T-Lion](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-lion/aa15f39401df.png)

> **Battery Powered:** 18650

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