In the `platformio.ini` file, uncomment the `TFT_eSPI` line within the [common] section, under `lib_deps`:
```ini
# platformio.ini
...
[common]
...
lib_deps =
...
#For use of the TTGO T-Display ESP32 Module with integrated TFT display uncomment the following line
#TFT_eSPI
...
```
Also, while in the `platformio.ini` file, you must change the environment setup to build for just the esp32dev platform as follows:
Add lines to section:
```ini
default_envs = esp32dev
build_flags = ${common.build_flags_esp32}
-D USERMOD_ST7789_DISPLAY
```
Save the `platformio.ini` file. Once this is saved, the required library files should be automatically downloaded for modifications in a later step.
### TFT_eSPI Library Adjustments
We need to modify a file in the `TFT_eSPI` library. If you followed the directions to modify and save the `platformio.ini` file above, the `User_Setup_Select.h` file can be found in the `/.pio/libdeps/esp32dev/TFT_eSPI` folder.
Modify the `User_Setup_Select.h` file as follows:
* Comment out the following line (which is the 'default' setup file):
```ini
//#include <User_Setup.h> // Default setup is root library folder
```
* Add following line:
```ini
#include <User_Setups/Setup_ST7789_Display.h> // Setup file for ESP32 ST7789V SPI bus TFT
```
* Copy file `"Setup_ST7789_Display.h"` from usermod folder to `/.pio/libdeps/esp32dev/TFT_eSPI/User_Setups`
