Basic application synced with Internet via NTP to test T-Display LilyGo and lvgl open-source embedded graphics library.
Please install first PlatformIO open source ecosystem for IoT development compatible with Arduino IDE and its command line tools (Windows, MacOs and Linux). Also, you may need to install git in your system. After install that you should have the command line tools of PlatformIO. Please test it with pio --help. Then please run the next command for build and upload the firmware:
pio run --target uploadUsing your USB cable, connect it and run:
pio device monitor