LilyGo T-Eth Lite
LilyGo T-Eth Lite is a development board based on the ESP32 microcontroller using XTENSA architecture.
This board features a maximum CPU frequency of 240 MHz and 16MB flash memory.
About LilyGo T-Eth Lite
๐ The LilyGo T-Eth Lite is an ESP32-based development board designed for Ethernet and IoT applications. Featuring a built-in LAN8720 Ethernet PHY, it enables wired network connectivity while maintaining ESP32's WiFi and Bluetooth functionalities. โก
๐ก With WiFi 802.11 b/g/n and Bluetooth 4.2, the board provides dual-mode connectivity, making it ideal for networking and automation applications.
๐พ The T-Eth Lite is equipped with 16MB Flash and 520KB SRAM, offering sufficient resources for a wide range of embedded and IoT projects.
Technical Specifications
Complete technical specification details for LilyGo T-Eth Lite
Quick Setup
Copy-paste configs for LilyGo T-Eth Lite - auto‑generated from this board's exact hardware specs.
In Arduino IDE 2 select Lilygo T Eth Lite from the esp32 by Espressif package. In PlatformIO use board = esp32dev. ESP32 · 240 MHz · 16MB · DIO.
In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools โ Board and select "Lilygo T Eth Lite" for the LilyGo T-Eth Lite.
LilyGo T-Eth Lite Pinout Diagram
Complete pin reference for LilyGo T-Eth Lite
Safe Pins to Use
These pins are safe for general GPIO usage without boot or system conflicts.
Pins to Avoid or Use with Caution
Reserved for critical functions. Misuse may cause boot failures, programming issues, or system conflicts.
| Pin | Label | Why Avoid | Type |
|---|---|---|---|
| IO1 | U0TXD (GPIO1) | Connected to on-board USB-UART for uploading and logs; drives serial output at boot, so using as GPIO can disrupt programming or console. | ๐ USB |
| IO2 | GPIO2 | If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure. | ๐ ๏ธ Strapping |
| IO3 | U0RXD (GPIO3) | Used for receiving data from USB-UART (programming); also pulled HIGH at boot for console communication, so using as GPIO can disrupt uploads. | ๐ USB |
| IO16 | GPIO16 | Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules. | โก Flash |
| IO17 | GPIO17 | Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules. | โก Flash |
Useful Links
Datasheets and resources for LilyGo T-Eth Lite
LilyGo T-Eth Lite Custom Pin Mapping
Pin configuration and GPIO mapping for LilyGo T-Eth Lite
| Pin | Function | ESP Pin | I/O Type | Description |
|---|---|---|---|---|
| 1 | 3V3 | 3.3V | POWER OUTPUT | 3.3V power output |
| 2 | GND | GND | POWER GROUND | Ground connection |
| 3 | 5V | 5V | POWER INPUT | 5V power input |
| 4 | IO1 | GPIO1 | BIDIRECTIONAL | GPIO, ADC, I2C |
| 5 | IO2 | GPIO2 | BIDIRECTIONAL | GPIO, ADC |
| 6 | IO3 | GPIO3 | BIDIRECTIONAL | GPIO, ADC |
| 7 | IO16 | SPI_CS | BIDIRECTIONAL | GPIO, SPI Chip Select |
| 8 | IO17 | SPI_D | BIDIRECTIONAL | GPIO, SPI Data |
| 9 | IO18 | SPI_CLK | BIDIRECTIONAL | GPIO, SPI Clock |
| 10 | IO19 | SPI_Q | BIDIRECTIONAL | GPIO, SPI Q |
| 11 | IO21 | ETH_TX | OUTPUT | GPIO, Ethernet TX |
| 12 | IO22 | ETH_RX | INPUT | GPIO, Ethernet RX |
| 13 | IO23 | ETH_MDIO | BIDIRECTIONAL | GPIO, Ethernet MDIO |
Default Tools & Configuration
Build and upload settings for LilyGo T-Eth Lite
| Setting | Value |
|---|---|
| Bootloader tool | esptool_py |
| Uploader tool | esptool_py |
| Network uploader tool | esp_ota |
| Bootloader address | 0x1000 |
| Flash mode | dio |
| Boot mode | qio |
| Maximum upload size | 1280 KB (1310720 bytes) |
| Maximum data size | 320 KB (327680 bytes) |
The LilyGo T-Eth Lite uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x1000.
Flash mode: dio | Boot mode: qio
Max sketch size: 1280 KB | Max data size: 320 KB
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