LilyGo T-Echo Card 868MHz SX1262

The LilyGo T-Echo Card 868MHz SX1262 is a compact IoT development board in credit card format, based on the nRF52840 microcontroller. It combines LoRa communication via the SX1262 transceiver with frequency support in the 868MHz band, designed for European use. For positioning, the L76K GNSS module is available, supporting GPS, GLONASS, BeiDou, and QZSS. A nine-axis motion sensor of the type ICM20948 integrates an accelerometer, gyroscope, and magnetometer in a single chip. For visual output, a 0.42-inch OLED display with a resolution of 72 × 40 pixels is used, controlled via I2C. The board features a digital MEMS microphone (MP34DT05) and an I2S mono amplifier (MAX98357) for audio recording and playback. Three addressable WS2812C-2020 RGB LEDs enable colorful status indication with 256 brightness levels. An integrated 0.25W solar panel at 5V serves as an additional power source. Wireless communication includes BLE 5, Thread, Zigbee, ANT, NFC, 802.15.4, and Bluetooth Mesh, with NFC currently not activated in the standard firmware. Additionally, 32 Mbit of external SPI Flash memory is available for data and firmware storage. Programming is done via the Arduino IDE with the Adafruit nRF52 Board Support Package, and the source code is available on GitHub.

Features:

• Compact credit card format with dimensions 90 × 60 × 9.5 mm enables mobile use.
• LoRa transceiver SX1262 provides energy-efficient long-range communication in the 868MHz band.
• Integrated L76K GNSS module supports GPS, GLONASS, BeiDou, and QZSS for precise positioning.
• Nine-axis motion sensor ICM20948 combines accelerometer, gyroscope, and magnetometer.
• Solar panel with 0.25W at 5V supplements power supply for autonomous operation.
• Diverse wireless standards such as BLE 5, Thread, Zigbee, ANT, NFC, and 802.15.4 are hardware-integrated.

Use Cases:

• Setting up a Meshtastic network for offline text communication over long distances.
• Mobile environmental data collection with GPS tracking and motion detection outdoors.
• Prototyping IoT sensor nodes with LoRa connectivity for smart agriculture projects.
• Developing a portable location tracker with solar-powered energy supply.

Documentation:

• GitHub
• LILYGO WIKI

Technical Specifications:

Manufacturer: LilyGo

Manufacturer SKU: H791

SoC: nRF52840

CPU: ARM Cortex-M4F @ 64 MHz

RAM: 256 kB

Flash (internal): 1 MB

Flash (external): 32 Mbit SPI (ZD25WQ32CEIGR)

LoRa Transceiver: SX1262, 400–945 MHz (868 MHz variant)

GNSS Module: L76K (GPS, GLONASS, BeiDou, QZSS)

Display: 0.42" OLED, SSD1315, 72 × 40 px, I2C

Motion Sensor: ICM20948, 9-Axis, I2C

Microphone: MP34DT05 MEMS, PDM

Amplifier: MAX98357 I2S, 8 Ω / 1 W

RGB LED: WS2812C-2020 (3 units)

Solar Panel: 0.25 W, 5 V

Wireless Standards: BLE 5, Thread, Zigbee, ANT, NFC, 802.15.4, Bluetooth Mesh

Product Dimensions: 90 × 60 × 9.5 mm

Packaging Dimensions: 120 × 85 × 60 mm

Gross Weight: 150 g

Contents:

• 1× LilyGo T-Echo Card 868MHz SX1262