Manuals+

LILYGO Meshtastic T-Echo

LILYGO® TTGO Meshtastic T-Echo LoRa Wireless Module Instruction Manual

Model: Meshtastic T-Echo

1. Producte acabatview

The LILYGO® TTGO Meshtastic T-Echo is an advanced wireless communication module designed for long-range, off-grid communication, particularly compatible with the Meshtastic network. It features a robust NRF52840 SoC, a Semtech SX1262 LoRa RF transceiver, and a 1.54-inch E-Paper display. This device is ideal for DIY projects, LoRa networking, GPS positioning, IOT terminal control, and STEM education.

Característiques principals:

  • Meshtastic Compatibility: Designed for seamless integration with the Meshtastic network, enabling secure and reliable mesh communication.
  • NRF52840 SoC: Supports Bluetooth 5, Thread, Bluetooth Mesh, ANT, 802.15.4, and Zigbee multi-protocol.
  • LoRa SX1262 Transceiver: Offers long-range, low-power communication with global frequency coverage (433MHz, 868MHz, 915MHz).
  • Integrated GNSS Module (L76K): Supports GPS, BeiDou, GLONASS, and QZSS for multi-system joint or independent positioning, with improved receiving and anti-interference attributes.
  • 1.54-inch E-Paper Display: 200x200 resolution with front light for clear visibility in various environments.
  • Disseny durador: Upgraded from 3D printed shell to a more robust ABS material enclosure.
  • Optional BME280 Sensor: Available with or without a BME280 temperature, pressure, and humidity sensor.

Actualitzacions del producte:

  • Upgraded from the fragile 3D printed shell to a more durable ABS material enclosure, aligning better with the product's positioning.
  • Color options have expanded to include white, black, gray, and brown, offering greater variety.

Update time: February 11, 2022

LILYGO T-Echo front and back view
Figure 1: LILYGO T-Echo LoRa Wireless Module (Front and Back)
Two LILYGO T-Echo devices (white and brown) on a track
Figure 2: LILYGO T-Echo in White and Brown variants

2. Contingut del paquet

Si us plau, comproveu el contingut del paquet en rebre'l:

  • 1 x LILYGO® TTGO Meshtastic T-Echo LoRa Wireless Module
  • 1 x USB Battery Cable
White LILYGO T-Echo with USB cable
Figure 3: LILYGO T-Echo and USB Cable

3. Setup and Firmware Installation

The LILYGO T-Echo requires Meshtastic firmware for full functionality. Follow these steps to install or update the firmware:

3.1. Descàrrega de firmware

  1. Obre el teu web browser and navigate to the Meshtastic documentation: meshtastic.org/docs/getting-started.
  2. On the left-hand menu, click on "Software" then "Device firmware".
  3. Locate and click the "Downloads" link on the Device firmware page to access the firmware download list.
  4. Baixeu el firmware adequat file (p. ex., firmware-t-echo-xxxx.uf2) for your device.
  5. Unzip the downloaded firmware package if it's compressed.
Screenshot of Meshtastic website showing firmware download steps
Figure 4: Meshtastic Firmware Download Process

3.2. Instal·lació del firmware

  1. Connect your LILYGO T-Echo to your computer using the provided USB cable (USB-A to USB-C).
  2. The device should appear as a removable disk (e.g., "TECHBOOT"). Double-click on it. The disk will eject after a moment.
  3. Copia el descarregat firmware-t-echo-xxxx.uf2 file into the root directory of the "TECHBOOT" disk.
  4. The T-Echo will automatically refresh and restart after the file is copied, indicating successful firmware installation.
Video 1: How to Install Meshtastic to T-Echo (Firmware Flashing Guide)

Nota important:

There are significant changes between Meshtastic firmware version branches 1.2.x and 1.3.x. For devices to communicate with each other, and with Python, Android, or other software applications, they must all be running the same branch of firmware.

4. Instruccions de funcionament

After successful firmware installation, you can operate your T-Echo using the Meshtastic mobile application.

4.1. Meshtastic Mobile App Setup

  1. Before operation, install the Meshtastic App on your phone. Download it from meshtastic.org.
  2. Open the Meshtastic app and switch to the connection interface.
  3. Cerca your updated T-Echo device and connect to it.
  4. Once connected, you can select your desired frequency band and enter a user name.
  5. Switch to the message interface within the app.
Meshtastic app interface showing device connection and message options
Figure 5: Meshtastic App Connection Interface

4.2. Enviament de missatges

To send messages to all users on the mesh network, click the "All" channel within the Meshtastic app. You can then type and send your message.

Two phones demonstrating sending and receiving messages via Meshtastic app
Figure 6: Sending and Receiving Messages via Meshtastic App

4.3. Button Functions (Meshtastic Firmware)

The T-Echo device has two buttons (Button 1 and Button 2) and LED indicators for various functions:

Diagram of T-Echo Meshtastic button functions and LED indicators
Figure 7: T-Echo Meshtastic Button Functions

Indicadors LED:

  • LED vermell: USB power supply/charge indicator
  • LED verd: Indicador d'energia de la bateria
  • LED blau: Bluetooth low energy work indicator

Button 1 Functions:

  • Press once: Reset
  • Press twice: Programming/Development (DFU Mode)

Button 2 Functions (when device is turned on):

  • Press once: Changes the page displayed on the device
  • Press twice: Send temporary node information
  • Press 3 times: Turn off/on the GPS
  • Press 4 times: Turn off/on the Backlight
  • Premsa llarga: apagueu el dispositiu

Button 2 Functions (when device is turned off):

  • Press: Turn on the device

Nota:

Button 2 and touch functions are only available in the SoftRF program. If you use other programs, these functions can be freely defined.

5. Especificacions

Característica Descripció
Número de model Meshtastic T-Echo
Xip mestre NRF52840
Memòria Flash 2 MB
RAM 256 KB
Bus Interfaces UART, SPI, TWI, PDM, I2S, QSPI
Connectivitat sense fil Bluetooth 5, Thread, Bluetooth Mesh, ANT, 802.15.4, Zigbee
Mòdul sense fil LoRa SX1262
Optional Frequency Band 433 MHz/868 MHz/915 MHz
Mostra 1.54 inch SPI E-Paper, Grey level: 2, Resolution: 200x200, Full refresh time: 2s, Partial refresh: 0.3S
Mòdul GNSS L76K Multi-System Positioning (GPS, GLONASS, BeiDou, QZSS), Support Function: LNA, SAW Filter, AGNSS, 1PPS
Sensor opcional BME280 (temperature, pressure, humidity)
Dimensions (L x A x A) 127 mm x 53.8 mm x 24.3 mm
Pes 0.12 kg
Capacitat de la bateria 850 mAh
LILYGO T-Echo dimensions diagram
Figure 8: T-Echo Dimensions
LILYGO T-ECHO NRF52840 Board PINMAP diagram
Figure 9: T-Echo NRF52840 Board Pinmap

6. Manteniment

To ensure the longevity and optimal performance of your LILYGO T-Echo, please follow these maintenance guidelines:

  • Condicions ambientals: Keep the device dry and avoid exposure to extreme temperatures, humidity, or direct sunlight.
  • Neteja: Feu servir un drap suau i sec per netejar el dispositiu. No utilitzeu productes químics agressius ni materials abrasius.
  • Cura de la bateria: The device is equipped with an 850mAh battery. Charge it using the provided USB cable. Avoid overcharging or completely draining the battery for extended periods to prolong its lifespan.
  • Emmagatzematge: When not in use for a long time, store the device in a cool, dry place.
LILYGO T-Echo charging port and LED indicators
Figure 10: T-Echo Charging Port

7. Solució De Problemes

  • Device not connecting to Meshtastic App:
    • Ensure the correct Meshtastic firmware is installed on your T-Echo. Refer to Section 3.
    • Verify that the Meshtastic app on your phone is up-to-date.
    • Check Bluetooth settings on your phone and ensure it's enabled and discoverable.
    • Restart both the T-Echo and your phone, then try connecting again.
  • Messages not sending or receiving:
    • Confirm that all devices in your mesh network are running compatible firmware versions (e.g., all 1.2.x or all 1.3.x).
    • Check the selected frequency band in the Meshtastic app and ensure it complies with local regulations and matches the devices in your network.
    • Ensure devices are within range of each other. LoRa range can be affected by obstacles and terrain.
    • Verify that the antenna is securely attached to the T-Echo.
  • T-Echo not turning on:
    • Assegureu-vos que la bateria estigui carregada. Connecteu el dispositiu a una font d'alimentació amb el cable USB.
    • If the device is completely off, press Button 2 once to turn it on.
  • Problemes de visualització:
    • If the display is blank or frozen, try resetting the device by pressing Button 1 once.
    • If the backlight is off, press Button 2 four times (with Meshtastic firmware) to toggle it.

8. Consells d'usuari

  • Compatibilitat de firmware: Always ensure all your Meshtastic devices and the mobile app are running on the same major firmware version branch (e.g., all 1.2.x or all 1.3.x) to guarantee communication.
  • Banda de freqüència: When setting up your device, select the frequency band (433MHz, 868MHz, or 915MHz) that complies with local regulations in your region. For example, if operating in Chile, ensure your device is configured for the 915-928 MHz range if allowed by local regulations.
  • BME280 Sensor: The "BME280 KIT" versions of the T-Echo include an integrated temperature, pressure, and humidity sensor, which can provide additional environmental data to your Meshtastic network.
  • Personalització: For advanced users, the touch function and Button 2 can be freely redefined if you are using custom programs other than the default SoftRF.

9. Garantia i Suport

LILYGO is committed to providing quality products and support. Please refer to the following guidelines for customer service:

  • Product Inquiries: If you have any questions about the product or your order, please contact LILYGO customer service for a satisfactory solution.
  • Damaged Products: In case of damage due to external force or transportation, please provide clear pictures of the logistics label, carton/bag, and the damaged product. LILYGO will investigate with the Logistics Service Provider and offer a corresponding solution.
  • Customization & Bulk Orders: For product customization, alternative logistics channels, bulk purchases, or any other inquiries, feel free to contact LILYGO customer service.
Customer service notes from LILYGO
Figure 11: LILYGO Customer Service Information

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