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LILYGO

LILYGO T-Echo

Carry an e-paper mesh companion with built-in positioning.

Mesh networkingRadioMeshtasticLoRaBluetooth LE

Availability: Listed
Design: Schematics
Radio: SX1262 LoRa

Where to buy · 3 shops

Compare with similar devices

Radio equipment needs certification where you live (FCC, CE, UKCA, ISED, Anatel). Some devices are uncertified or restricted in Brazil. Buyers are responsible for their local law.

Bring along: A matching regional radio band and a phone/client for text entry.
Keep in mind: This is the original T-Echo, not the newer T-Echo Plus.

Source checked · Sep 16, 2026

LILYGO T-Echo — Image credit
Maker product image · LILYGO

(02) Blueprint

What’s published

Schematics published

LILYGO's T-Echo repo publishes a PDF schematic and an STL 3D case model, plus firmware/datasheets; no editable PCB source (no .kicad_pcb/.SchDoc).

T-Echo 3D case model (STL)

Read straight from the maker’s repository. Open on GitHub

T-Echo 3D case model (STL)

GitHub

Design files 2

Source 1

Xinyuan-LilyGO/T-EchohardwareMIT236

git clone https://github.com/Xinyuan-LilyGO/T-Echo.git

Key parts 4

nRF52840 All nRF52840 devicesMCU + BLEDatasheet
SX1262 All SX1262 devicesLoRa radio (433/868/915MHz)Datasheet
SSD1681All SSD1681 devicese-paper display controller
Quectel L76K All L76K devicesGNSS (GPS/BeiDou/GLONASS/QZSS)Datasheet

Research notes

MIT-licensed repo but only firmware/examples + PDF schematic + STL are published; no native PCB source found. SX1262 confirmed via multiple retailer/Meshtastic listings, not stated explicitly in the schematic filename.

Every link checked 2026-09-27.

Hand this device to your agent. Everything on this page, as clean Markdown and JSON: specs, shops, prices, design files, parts.

Markdown JSON

Made the LILYGO T-Echo? Put the badge on your README; it links here, with every shop that sells it.

Specifications

Compute & display

Controller: nRF52840; Cortex-M4F, 64 MHz
External flash: MX25R1635F option: 16 Mbit (2 MB). See the supplier variants below.
Display: 1.54-inch SPI e-paper; 200 × 200; two gray levels; 2-second full refresh
Internal memory: 1 MB flash; 256 KB RAM
Flash variants: MX25R1635FZUIL0 or ZD25WQ16B, depending on supply
Display controller: SSD1681; GDEH0154D67 panel

Radio & positioning

LoRa: SX1262; 433, 868, 915 and Japan 920–923 MHz SKU options
2.4 GHz: Bluetooth 5; silicon also supports Thread, ANT and 802.15.4/Zigbee with appropriate firmware
GNSS: L76K; GPS, GLONASS, BeiDou and QZSS
GNSS features: LNA, SAW filter, assisted GNSS and 1PPS
Sensor option: BME280 temperature/pressure variant

Power & software

Battery: 850 mAh
Enclosure: ABS; several color options
Firmware: LILYGO factory firmware, SoftRF and Meshtastic resources
Buses: UART, SPI, TWI, PDM, I²S and QSPI listed
USB power: 4.8–5.5 V; maker requires a USB-A-to-C cable because C-to-C supplies may refuse power.
Charging: Fixed 500 mA; 3.7 V cell with MX 1.25 mm connector
Battery reading: ADC readings are unreliable while charging; use the charging indicator.
Charge LED: Solid: charging. Blinking: missing/faulty battery. Off: full.
Measured current: Maker example at 3.7 V: 42 mA active, 55 mA with backlight, 0.25 mA asleep; firmware affects results.
USB recovery: Double-click reset to enter DFU.
Firmware caveats: Adafruit nRF52 bootloader/core are supplied. nRF5 SDK programming can replace the bootloader; NFC needs that SDK.

Build connections & variants

Onboard I²C: SDA P0.26; SCL P0.27; RTC PCF8563 at 0x51; optional BME280 at 0x77
Radio SPI: SCK P0.19; MOSI P0.22; MISO P0.23; CS P0.24
Radio control: Reset P0.25; BUSY P0.17; DIO1 P0.20
Buttons and ADC: User P1.10 active low; touch P0.11 active high; battery ADC P0.4
Plus distinction: Plus adds a 2400 mAh battery, BHI260, haptic feedback and buzzer.

What still needs checking

LILYGO’s store lists 2 MB RAM; Nordic confirms 256 KB internal RAM. The store’s 2 MB flash entry is kept separate from the nRF52840’s 1 MB internal flash.
The repository mixes Nordic port names with Arduino numbers and gives inconsistent numbering for a display pin. New pin rows use Nordic port names; verify the full schematic before wiring.
Dimensions, weight and complete package contents remain unconfirmed for the selected case and sensor variant.

Downloads & docs

Maker specifications and documentationlilygo.cc Meshtastic supported hardwaremeshtastic.org LILYGOgithub.com SoftRFgithub.com Meshtasticgithub.com Current T-Echo hardware repositorygithub.com Nordic nRF52840 internal memory and CPUnordicsemi.com T-Echo schematicgithub.com T-Echo enclosure STLgithub.com T-Echo factory firmware recoverygithub.com Macronix MX25R1635F external flash capacitymacronix.com

Trending repos & firmware

Meshtastic for T-EchoMesh OS

15.2k

Low-power Nordic nRF52840 build featuring e-paper display, GPS tracking, and battery optimization.

meshtastic/firmware

Source & revision notes

Maker listing checked Sep 16, 2026. Detailed documentation reviewed Sep 16, 2026. Not hands-on tested.

Price is a dated listing; confirm with the maker.

The maker separately lists the T-Echo Plus. This entry covers the original T-Echo with its 850 mAh battery and L76K GNSS.

BME280 is optional. Nordic confirms 1 MB internal flash and 256 KB RAM; the store’s 2 MB RAM claim conflicts with the chip specification. The maker separately lists 2 MB external flash.

Price read from LILYGO on 2026-09-18: US$44.61 for any band or colour from China, US$46.04 with the BME280 sensor, US$49.11 from the US, German or Canadian warehouses. The US$4 item on the same page is a spare shell.

This profile covers the original 850 mAh T-Echo. Its Plus comparison does not imply that Plus peripherals are fitted to the base device.

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