# LILYGO T-Echo

> nRF52840 + SX1262 LoRa + L76K GPS all-in-one board with 1.54-inch e-paper display, 850mAh battery, Thread, Zigbee, and BLE 5.0 — runs Meshtastic, SoftRF, and custom NRF firmware out of the box.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$44.61
- **Product Readiness:** developer
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, HW crypto (AES/SHA/CCM)
- **CPU Architecture:** ARM Cortex-M4F
- **CPU Cores:** 1
- **RAM:** 512KB SRAM
- **Flash:** 16MB
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo
- **Operating Voltage:** 3.3V
- **Battery:** 850mAh
- **Charging Port:** USB-C
- **Antenna:** U.FL/IPEX (LoRa + GPS)
- **Display:** 1.54" E-Paper 200×200

## Connectivity

- **Bluetooth:** BLE 5.0
- **Lora:** SX1262 433/868/915MHz
- **Zigbee:** Zigbee 3.0 (nRF52840)
- **Thread:** Thread (nRF52840)

## Open Source

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

## Certifications

CE, FCC, MIC

## Compatible Firmware

arduino, platformio, meshtastic, meshcore

## Use Cases

- lora-mesh-networking
- off-grid-communication
- gps-tracking
- asset-tracking
- field-data-logger

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 ARM Cortex-M4F at 64MHz supporting BLE 5.0, Thread, Zigbee, ANT, and 802.15.4 simultaneously. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.7.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver for 433/868/915 MHz with +22 dBm output and -148 dBm sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2FDS_SX1261-2_V2.1.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- **L76K** (gps): Quectel L76K multi-GNSS module supporting GPS, GLONASS, BeiDou, and QZSS with LNA and SAW filter. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.quectel.com%2Fwp-content%2Fuploads%2F2021%2F03%2FQuectel_L76K_GNSS_Specification_V1.0.pdf&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)

## Protocols

- **SPI**: MOSI: P0.20, MISO: P0.21, CLK: P0.19, CS: P0.24
- **I2C**: SDA: P0.26, SCL: P0.27
- **UART**: TX: P0.15, RX: P0.17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| P0.00 | XL1 (32kHz crystal) | GPIO | digital-input |
| P0.11 | Button 1 | GPIO | digital-input |
| P0.15 | GPS UART TX | UART | digital-output |
| P0.17 | GPS UART RX | UART | digital-input |
| P0.19 | LoRa SPI CLK | SPI | digital-output |
| P0.20 | LoRa SPI MOSI | SPI | digital-output |
| P0.21 | LoRa SPI MISO | SPI | digital-input |
| P0.24 | LoRa SPI CS | SPI | digital-output |
| P0.26 | I2C SDA | I2C | digital-input, digital-output |
| P0.27 | I2C SCL | I2C | digital-output |
| P1.01 | Button 2 | GPIO | digital-input |
| P1.02 | Free GPIO | GPIO | digital-input, digital-output |

## Description

## Overview

The LILYGO T-Echo is a highly integrated portable device combining Nordic Semiconductor nRF52840 multiprotocol SoC with a Semtech SX1262 LoRa radio, a Quectel L76K multi-GNSS receiver, and a 1.54-inch e-paper display in a compact handheld form factor. With an 850mAh battery, the T-Echo can operate for days between charges, making it ideal for off-grid mesh networking, outdoor navigation, and long-range sensor monitoring.

The nRF52840 provides Bluetooth 5.0, Thread 1.3, Zigbee 3.0, ANT, and 802.15.4 protocols simultaneously, making the T-Echo one of the most versatile wireless platforms available. The SX1262 LoRa radio covers 433, 868, and 915 MHz bands with +22 dBm output power and -148 dBm sensitivity for multi-kilometer range. The L76K GNSS module supports GPS, GLONASS, BeiDou, and QZSS constellations.

The T-Echo is the official reference hardware for Meshtastic LoRa mesh networking and also runs SoftRF aircraft tracking firmware. An optional BME280 variant adds barometric pressure, temperature, and humidity sensing. The 1.54-inch e-paper display with 200×200 resolution provides persistent information display without battery drain.

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lilygo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export) — $44.61

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-echo-lilygo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGO-T-Echo&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.lilygo.cc&ref=openhardware.directory&product=lilygo-t-echo&source=md-export)

## Tags

`nrf52840`, `lora`, `gps`, `e-paper`, `meshtastic`, `lilygo`, `thread`, `zigbee`, `ble5`, `off-grid`

## Images

![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/86b3cc2ea315.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/8e26df3d0217.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/5d3887997b37.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/3955861c0185.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/ccaad207d0d2.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/408126752804.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/56a95896e00b.jpg)
![LILYGO T-Echo](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-echo/07238d409974.jpg)

> **Battery Powered:** Li-Po

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