# LILYGO T3 LoRa32 V1.6.1 > ESP32-PICO-D4 development board with LoRa SX1276/SX1278 radio, 0.96\" SSD1306 OLED, microSD slot, WiFi, Bluetooth 4.2, and LiPo battery support in a compact 66×36mm form factor. ## Quick Facts - **Brand:** LILYGO - **Board Type:** dev-board - **Price:** ~$15.6 - **Product Readiness:** developer - **CPU:** Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA) - **CPU Architecture:** Xtensa LX6 - **CPU Cores:** 2 - **RAM:** 520KB SRAM - **Flash:** 4MB - **USB:** Micro-USB - **Power:** 5V + LiPo - **Operating Voltage:** 3.3V - **Operating Temp:** -40°C to +85°C - **Dimensions:** 66 × 36 × 15mm - **Weight:** ~30g - **Antenna:** U.FL/IPEX (LoRa) + PCB built-in (WiFi) - **SD Card:** microSD - **Display:** 0.96" OLED 128×64 ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BLE 4.2 - **Lora:** SX1276 868/915MHz or SX1278 433MHz ## Open Source - **Firmware:** Yes - **Schematics:** Yes - **PCB Layout:** No ## Compatible Firmware arduino, platformio, micropython, meshtastic, esphome, paxcounter ## Use Cases - lora-mesh-networking - off-grid-communication - crowd-counting - environmental-monitoring - iot-gateway - field-data-logger ## Components - **ESP32-PICO-D4** (mcu): Espressif ESP32-PICO-D4 System-in-Package with Xtensa LX6 dual-core @ 240MHz, 4MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2, and hardware crypto acceleration. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-pico-d4_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - **SX1276** (radio): Semtech SX1276 LoRa transceiver with -148dBm sensitivity, +14dBm output power, FSK/GFSK/MSK/GMSK/LoRa/OOK modulation, 137–1020MHz range. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.semtech.com%2Fproducts%2Fwireless-rf%2Flora-connect%2Fsx1276&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver with 128×64 resolution, I2C interface at 0x3C, and 256-step brightness control. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - **CH9102** (usb-uart): WCH CH9102 USB-to-UART converter supporting up to 4Mbps baud rate with hardware full-duplex UART and built-in crystal oscillator. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.wch-ic.com%2Fdownloads%2FCH9102DS1_PDF.html&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) ## Protocols - **SPI** (VSPI (LoRa)): CLK: GPIO5, MOSI: GPIO27, MISO: GPIO19, CS: GPIO18 - **SPI** (HSPI (SD Card)): CLK: GPIO14, MOSI: GPIO15, MISO: GPIO2, CS: GPIO13 - **I2C** (I2C0 (OLED)): SDA: GPIO21, SCL: GPIO22 - **UART** (UART0 (USB)): TX: GPIO1, RX: GPIO3 ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO0 | Boot Button | — | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO2 | SD MISO | SPI | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO5 | LoRa SCK | SPI | digital-input, digital-output, pwm | | GPIO13 | SD CS | SPI | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO14 | SD SCK | SPI | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO15 | SD MOSI | SPI | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO16 | OLED RST | — | digital-input, digital-output, pwm | | GPIO18 | LoRa CS | SPI | digital-input, digital-output, pwm | | GPIO19 | LoRa MISO | SPI | digital-input, digital-output, pwm | | GPIO21 | OLED SDA | I2C | digital-input, digital-output, pwm | | GPIO22 | OLED SCL | I2C | digital-input, digital-output, pwm | | GPIO23 | LoRa RST | — | digital-input, digital-output, pwm | | GPIO25 | User LED | — | digital-input, digital-output, pwm, dac, rtc | | GPIO26 | LoRa DIO0 | — | digital-input, digital-output, pwm, dac, adc, rtc | | GPIO27 | LoRa MOSI | SPI | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO32 | LoRa DIO2 | — | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO33 | LoRa DIO1 | — | digital-input, digital-output, pwm, touch, adc, rtc | | GPIO35 | Battery ADC | — | digital-input, adc, input-only, rtc | ## Accessories - external-antenna ## Description ## Overview The LILYGO T3 LoRa32 V1.6.1 is a compact, affordable development board that pairs an ESP32-PICO-D4 System-in-Package with a Semtech SX1276 or SX1278 LoRa transceiver for long-range, low-power wireless communication. Available in 433MHz, 868MHz, 915MHz, and 923MHz variants, it covers all major LoRa frequency bands worldwide. The onboard 0.96-inch SSD1306 OLED display provides a convenient status readout without any external wiring. The board integrates a microSD card slot for data logging, a 3.7V LiPo battery connector with built-in charging via Micro-USB, and a CH9102 USB-to-serial bridge for programming and debugging. With WiFi 802.11 b/g/n and Bluetooth 4.2 alongside LoRa, it serves as a versatile multi-protocol gateway or sensor node. A strong community ecosystem backs this board with pre-built firmware options including Meshtastic for off-grid mesh messaging, Paxcounter for WiFi/BLE crowd counting, Disaster Radio for emergency mesh networks, and ESPHome for Home Assistant integration. Its low price point and wide firmware compatibility make it one of the most popular entry-level LoRa development boards available. ## Where to Buy - [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) — $15.60 - [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FLILYGO-LoRa32-433Mhz-Development-Paxcounter%2Fdp%2FB0B45L398K&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) — $15.60 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Flora3&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc%2Fget_started%2Fen%2FLoRa_GPS%2FLoRa32%2FLoRa32.html&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series%2Fblob%2Fmaster%2Fschematic%2FT3_V1.6.1.pdf&ref=openhardware.directory&product=lilygo-t3-lora32-v1-6-1&source=md-export) ## Tags `esp32`, `lora`, `oled`, `iot`, `mesh-networking`, `paxcounter`, `meshtastic`, `disaster-radio` ## Images ![LILYGO T3 LoRa32 V1.6.1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-lora32-v1-6-1/8ecff8ab8b3b.jpg) ![LILYGO T3 LoRa32 V1.6.1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-lora32-v1-6-1/883686c87155.jpg) ![LILYGO T3 LoRa32 V1.6.1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-lora32-v1-6-1/3a91df4b0184.jpg) ![LILYGO T3 LoRa32 V1.6.1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-lora32-v1-6-1/4d3a424175fd.jpg) ![LILYGO T3 LoRa32 V1.6.1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-lora32-v1-6-1/aa15f39401df.png) > **Battery Powered:** Li-Po --- [View full device page](https://openhardware.directory/devices/lilygo-t3-lora32-v1-6-1)