LILYGO T-ECHO BME280 Meshtastic LoRa SX1262 Wireless Module 433/868/915MHz nRF52840

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Product Link

LILYGO T-ECHO BME280 Meshtastic LoRa SX1262 Wireless Module 433/868/91OpenELAB Technology Ltd.

Description

Specification

MCU	NRF52840
FLASH	2MB
RAM	2MB
Bus Interfaces	UART, SPI, TWI, PDM, 12S, QSPI
Wireless Connectivity	Bluetooth 5, Thread, Bluetooth Mesh, ANT, 802.15.4, Zigbee With/Without BME280 temperature pressure sensor
SX1262 LoRa Transceiver	Long Range, Low Power Global frequency coverage 433, 868, 915Mhz
Enclosure material	ABS
Version	Normal version / BME280 version
Battry Capacity	850mAh

1.54-inch SPI E-Paper Display

Grey level	2
Resolution	200x200
Full refresh time	2S

L76K Multi-System Positioning GNSS module

Support System	GPS, GLONASS, BeiDou, QZSS
Support Function	LNA, SAW Filter, AGNSS, 1PPS Improved receiving and anti-interference attributes

Using Arduino IDE

1. Download Arduino IDE

2. Open Arduino, open preferences-> add https://adafruit.github.io/arduino-board-index/package_adafruit_index.json to the board installation manager address list

3. Open the board installation manager, wait for the index update to complete, select 'Adafruit nRF52 by Adafruit' and click install

4. After the installation is complete, select 'Nordic nRF52840(PCA10056)' or 'Nordic nRF52840 DK' in the board list

5. Copy all the folders in the lib directory to "C:\User\<YourName>\Documents\Arduino\libraries"

6. Open the sketch => tool => port, select the port of the connected board, and click upload

Using PlatformIO

1. Install VSCODE and Python

2. Search for the PlatformIO plug-in in the VSCODE extension and install it.

3. After the installation is complete and the reload is completed, there will be a small house icon in the lower left corner. Click to display the Platformio IDE home page

4. Go to file - > Open folder - > Select the LilyGO-T-ECHO folder and click the (√) symbol in the lower left corner to compile (→) for upload.

5. If you use USB to download the firmware (platformio.ini upload_protocol = nrfutil), you need to double-click reset button to enter DFU mode before downloading

Pin map

Antenna Actual Test Reference

Application

• T-Echo SoftRF T-Echo

• T-Echo Meshtastic T-Echo

Precautions

1. Need to use the files in the lib directory, it includes:

   • arduino-lmic

   • AceButton

   • Adafruit_BME280_Library

   • Adafruit_BusIO

   • Adafruit_EPD

   • Adafruit-GFX-Library

   • Button2

   • GxEPD

   • PCF8563_Library

   • RadioLib

   • SerialFlash

   • SoftSPI

   • TinyGPSPlus

2. Pins on boards are not compatible with the official SDK.If you want to use the SDK, pay special attention to the pin definition.

3. Use Adafruit_nRF52_Arduino by default, so Adafruit_nRF52_Bootloader has been burned in the factory, if you use nRF5-SDK Programming the board will lose the original bootloader

4. If you need to use nRF5-SDK for programming, please click the link to download nRF5-SDK

5. NFC Function is not supported in Adafruit_nRF52_Arduino, please use nRF5-SDK for programming

6. Flash will choose MX25R1635FZUIL0 or ZD25WQ16B according to the availability.Pay attention to the difference when using.

7. If you need to burn a new bootloader, see Burning a new bootloader

Battery life

Current consumption from 3.7 Volt battery:

Mode	Average current
Active backlight OFF	42 mA
Active backlight ON	55 mA
Sleep	0.25 mA

Operating time from a full charge depends on your actual battery capacity.

The below figure represents a more specific test, and you can use the example Sleep_Display to write your low-power device program.

Github:

T-Echo