WLED/usermods/ST7789_display/README.md

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# Using the ST7789 TFT IPS 240x240 pixel color display with ESP32 boards
This usermod enables display of the following:
* Current date and time;
* Network SSID;
* IP address;
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* WiFi signal strength;
* Brightness;
* Selected effect;
* Selected palette;
* Effect speed and intensity;
* Estimated current in mA;
## Hardware
***
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![Hardware](images/ST7789_Guide.jpg)
## Library used
[Bodmer/TFT_eSPI](https://github.com/Bodmer/TFT_eSPI)
## Setup
***
### Platformio.ini changes
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
...
```
In the `platformio.ini` file, you must change the environment setup to build for just the esp32dev platform as follows:
Add the following lines to section:
```ini
default_envs = esp32dev
build_flags = ${common.build_flags_esp32}
-D USERMOD_ST7789_DISPLAY
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-DUSER_SETUP_LOADED=1
-DST7789_DRIVER=1
-DTFT_WIDTH=240
-DTFT_HEIGHT=240
-DCGRAM_OFFSET=1
-DTFT_MOSI=21
-DTFT_SCLK=22
-DTFT_DC=27
-DTFT_RST=26
-DTFT_BL=14
-DLOAD_GLCD=1
;optional for WROVER
;-DCONFIG_SPIRAM_SUPPORT=1
```
Save the `platformio.ini` file. Once saved, the required library files should be automatically downloaded for modifications in a later step.
### TFT_eSPI Library Adjustments
If you are not using PlatformIO, you 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 `Setup24_ST7789.h` file can be found in the `/.pio/libdeps/esp32dev/TFT_eSPI/User_Setups/` folder.
Edit `Setup_ST7789.h` file and uncomment and change GPIO pin numbers in lines containing `TFT_MOSI`, `TFT_SCLK`, `TFT_RST`, `TFT_DC`.
Modify the `User_Setup_Select.h` by uncommenting the line containing `#include <User_Setups/Setup24_ST7789.h>` and commenting out the line containing `#include <User_Setup.h>`.
If your display uses the backlight enable pin, add this definition: #define TFT_BL with backlight enable GPIO number.