The TTGO T4 v1.3 offers a 2.4" (ILI9341) display, ESP32 dual-core Tensilica LX6, 4MBflash, 8MB PSRAM, MicroSD card slot, LiPo battery support, a 20-pin GPIO header, a 5-pin I2C connector for expansion and a three buttons.
TTGO-T4-OV7670.mp4
Pins used to connect TTGO T4 and OV7670 camera module are shown in below:
Тo gain access to the pins that is wired in to the MicroSD slot you can use Sparkfun MicroSD Sniffer
- or (if you carefully remove the cover of the MicroSD card slot and solder directly on to the pins or the pad).
| OV7670 Pins | TTGO T4 Pins |
|---|---|
| 3.3V | 3.3V |
| GND | GND |
| SCL | IO 13 (4.7kΩ Pull Up) |
| SDA | IO 15 (4.7kΩ Pull Up) |
| VSYNC / VS | IO 14 |
| HSYNC / HS | IO 34 |
| PCLK | IO 36 |
| XCLK / MCLK | IO 0 |
| D7 | IO 35 |
| D6 | IO 26 |
| D5 | IO 33 |
| D4 | IO 22 |
| D3 | IO 21 |
| D2 | IO 39 |
| D1 | IO 2 |
| D0 | IO 19 |
| RESET / RST | 3.3V |
| PWDN / PWNN | GND |
| 2.4" (ILI9341) display | TTGO T4 Pins |
|---|---|
| MOSI | IO 23 |
| CLK | IO 18 |
| CS | IO 27 |
| DC | IO 32 |
| MISO | IO 12 |
| LCD RST | IO 5 |
| LCD BACKLIGHT | IO 4 |