Before building, you need to edit TTyGO/config.h to match your system as well as configuring any software features you need.

Using the Arduino IDE

Required libraries

From the Arduino library manager:

• OneButton
• U8g2
• ESP8266Scheduler

Automated build from the command line

make upload

This will install arduino-cli if not already installed, download the esp8266 board as well as all required libraries, build TTyGO and upload it to your board. To use a non-standard serial port run e.g.

make TTGOTERM=/dev/ttyUSB5 upload 

To build for other hardware platforms, just supply the Arduino fqbn to make

make FQBN=arduino:avr:leonardo upload