Power-on Self Test for LilyGO® T-Echo (Nordic nRF52840 based) LoRaWAN GNSS tracker
ATTENTION: This test is designed to run on top of Adafruit CiruitPython interpreter.
For an Arduino or Platformio IDE, please, use this sketch created by Lewis He.
This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This power-on self test is running on top of CircuitPython 6 software from Adafruit Industies.
These 'frozen' modules are integrated into the custom CircuitPython build in order to better match the LilyGO® T-Echo board hardware specs:
- Adafruit_CircuitPython_EPD
- Adafruit_CircuitPython_GPS
- Adafruit_CircuitPython_BME280
- Adafruit_CircuitPython_framebuf
- Adafruit_CircuitPython_datetime
The T-Echo typically comes with factory pre-installed Adafruit_nRF52_Bootloader.
The Bootloader is capable to self-program an application firmware into the device. In order to simplify the firmware transfer, the bootloader emulates a "USB Mass Storage" interface.
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Download integrated (CircuitPython6 and scripts) POST firmware binary from this location ;
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Connect the LilyGO® T-Echo to your PC by means of a USB cable (Type-A <-> Type-C) ;
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Double click (within 0.5 seconds) onto the device RESET button. A virtual disk with NRF52BOOT label should appear in your "File manager" afterwards.
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Drag the downloaded firmware file by your pointing device (mouse, trackball,...) , then drop it into NRF52BOOT disk. Wait until the file transfer is complete.
| Name | Subject |
|---|---|
| LilyGO company | TTGO T-Echo |
| Adafruit Industries | CircuitPython , e-Paper and BME280 libraries |
| Lewis He | MicroPython PCF8563 library |
| Ehong-tl | Port of SX1262 driver from RadioLib library for MicroPython |