1  pinout ESP32s board (2x15 pins) GPIO#
 2  -------------------------------
 3              (NC)       EN           X 23 ILI SDI+T_DIN-SPI MOSI
 4          Key USER4      36             22 (NC)
 5          Key USER3      39             01 (NC)
 6          Key USER2      34 X           03 (NC)
 7          Key USER1      35 X         X 21 ILI DC 
 8          JOY2 Fire      32 X         X 19 ILI SDO+T_DO-SPI MISO
 9               (NC)      33           X 18 ILI SCK+T_CLK-SPI SCK
10         AUDIO DAC1      25 O         O 05 I2C SCL
11               (NC)      26           X 17 ILI CS-SPI CS
12       JOY2 AnalogX      27 X           16 (NC)
13     SD SCK-SPI CLK      14 X         O 04 I2C SDA
14   SD MISO-SPI MISO      12 X         X 02 JOY2 AnalogY
15   SD MOSI-SPI MISO      13 X         X 15 SD CS-SPI CS
16                        GND           X GND
17                        Vin    IUSBI  X 3.3v
18  
19  
20  
21  (X) mandatory pins to connect for the minimum set-up
22  (O) optional connections for audio and I2C keyboard support
23  
24  The keys (all) are using internal pullup so just connect the other side to the GND
25  I2C SDA,SCL, USER1 and USER2 requires external pullup.
26  The Analog joypad also needs VCC and GND connections !
27  The Display part of the ILI: SDI,SDO,SCK,CS but also DC,VCC and GND must be connected
28  The i2ckeyboard : I2C SCL, I2C SDA, VCC and GND
29  
30  Everything is powered over the USB connector of the ESP32!