ESP32-H2 Supermini with ST7735 TFT display Starter

Getting started with an ESP32-H2 Supermini device and a TFT display with driver chip ST7735.

This is the accompanying repository for my article "Getting Started with an ESP32-H2 Supermini device connected to an ST7735 TFT display: https://medium.com/@androidcrypto/0c46cbdc6f9a.

My display is a 1.8 inch large TFT display with 128 x 160 pixels.

Settings for the display specific setup file

I'm using a display specific setup file for the combination ESP32-H2 Supermini with TFT display driver ST7735. This file contains e.g. the display driver, size and pins for the ESP32-device. If your display has a different size please change the height and width accordingly.

Copy a file to the User_Setups folder

Please copy the file

Setup702_H2_SM_ST7735_128x160.h

to the User_Setups folder.

Edit the User_Setup_Select.h file

You need to place the following line in the root folder's "User_Setup_Select.h" file

#include <User_Setups/Setup702_H2_SM_ST7735_128x160.h> // ESP32-H2 Supermini, 27 MHz

Second: please comment all other "#include..." entries like this, especially the "//#include <User_Setup.h>" entry.

// Example User_Setup files are stored in the "User_Setups" folder. These can be used
// unmodified or adapted for a particular hardware configuration.
#ifndef USER_SETUP_LOADED //  Lets PlatformIO users define settings in
                          //  platformio.ini, see notes in "Tools" folder.
///////////////////////////////////////////////////////
//   User configuration selection lines are below    //
///////////////////////////////////////////////////////
// Only ONE line below should be uncommented to define your setup.  Add extra lines and files as needed.
//#include <User_Setup.h>                       // Default setup is root library folder
// Setup file in folder Arduino/libraries (updates will not overwrite your setups)
#include <User_Setups/Setup702_H2_SM_ST7735_128x160.h> // ESP32-H2 Super Mini, 27 MHz

GPIO pins setup in the display specific setup file

The setup file has these pin settings:

// file Setup702_H2_SM_ST7735_128x160.h

//#define TFT_BL   24 // LED back-light
#define TFT_MISO   22 //  not used/connected, pin 22 is existing on soldered pin
#define TFT_MOSI   10 // = SDA
#define TFT_SCLK   0
#define TFT_CS     14 
#define TFT_DC     12
#define TFT_RST    11 // Set TFT_RST to -1 if display RESET is connected to ESP32 board EN

Important note

You need to modify the display library TFT_eSPI to get the code to work. Please find instructions on how to do this in my forked TFT_eSPI repository here on GitHub: https://github.com/AndroidCrypto/TFT_eSPI.