• ESP32 + SDReader + PSRAM + 3.5' TFT (480x320) with Resistive touch screen
  • Rotrics

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Specs

  • ESP32
  • PSRAM: 8MB
  • FLASH: 8MB
  • Micro-SD card slot (SDIO 1 bit)
  • 3.5-inch 480x320 TFT display - ILI9488 (SPI)
  • Capacitive touch panel - XPT2046 (SPI)
  • Built-in microphone
  • Speaker
  • 1 USB-C (Serial 1)
  • 1 debug port: GND, 5V, EN, GPIO 0, GPIO 2, GPIO 1 (TX), GPIO 3 (RX)
  • Power Supply: 5V / 1A

Note

The USB-C connector is actually a raw serial 1 port, not a real USB port.

Serial 1 is the serial port used for communication with other devices.

Serial 0 is the serial port used for programming the ESP32, this port is not easily accessible because connector is not soldered.

So do not try to flash TFT using usb-c connector, it won't work.

Note about USB-C connector

The ESP32 serial 1 TX is on both TX3 of USB connector, and ESP32 serial 1 RX is on both RX3 of USB connector, GND is GND, 5V is 5V, D+, D-, TX6 and RX6 seems not connected.

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Pins

Pin Usage
GPIO 0 GPIO 0 / CODEC_ES8388_I2S_MCLK
GPIO 1 TX 0
GPIO 2 GPIO 2 / SDIO DAT0
GPIO 3 RX 0
GPIO 4 SDIO DAT1
GPIO 5 CODEC_ES8388_I2S_SCLK
GPIO 6 SPI FLASH
GPIO 7 SPI FLASH
GPIO 8 SPI FLASH
GPIO 9 SPI FLASH
GPIO 10 SPI FLASH
GPIO 11 SPI FLASH
GPIO 12 TFT_BL
GPIO 13 TFT_TOUCH_CS
GPIO 14 SDIO CLK
GPIO 15 SDIO CMD
GPIO 16
GPIO 17
GPIO 18 CODEC_ES8388_I2C_SDA - CE(low) wired to GND
GPIO 19 TFT_CS
GPIO 21 TX 1
GPIO 22 TFT_TOUCH_IRQ
GPIO 23 CODEC_ES8388_I2C_SCL
GPIO 25 CODEC_ES8388_I2S_LRCK
GPIO 26 CODEC_ES8388_I2S_DSDIN
GPIO 27 TFT_DC
GPIO 32 TFT_MOSI
GPIO 33 TFT_SCLK
GPIO 34 TFT_MISO
GPIO 35 CODEC_ES8388_I2S_ASDOUT
GPIO 36 RX 1
GPIO 37 SD_DETECT (Low)
GPIO 38
GPIO 39

CODEC_ES8388

Pin Usage
ROUT1
LOUT1
ROUT2 speaker
LOUT2
RIN2
LIN2
RIN1
LIN1 microphone