T-Keyboard S3 Pro Development Board
T-Keyboard S3 Pro Development Board
The T-Keyboard S3 Pro Development Board offers four magnetic connection interfaces with quick-connect capability. These magnetic interfaces allow multiple T-Keyboard-S3-Pro devices (up to 6 devices; the maximum brightness of the onboard LED needs to be reduced to 10 when multiple devices are connected) to be connected simultaneously. A total of five screens can be obtained by adding one more screen in addition to the original four. The position of the fifth screen on the main unit can be changed with the rotary encoder. It is worth noting that due to the long-distance cabling of the hardware, there are some limitations in the horizontal expansion of the board. Only one device can be extended to the left and right of the main unit, and a maximum of two devices can be extended downwards (the USB interface prevents expansion). This creates a 2x3 grid layout for a total of 6 devices.
The board also features 14 programmable RGB LED lights. When a single card is operating, all of these lights can be set to maximum brightness. However, when multiple cards are operating, setting the brightness to maximum is not recommended due to the large number of LEDs. If all LEDs are brightly lit, they generate a significant amount of heat, and the current of the USB port's power supply is limited. Each additional card increases the impedance in the 5V voltage transmission. In conclusion, considering various limitations such as heat generation, power supply limitations, and increased impedance, setting the LED brightness to 10 when connecting up to 6 devices is a reasonable setting.
You can access the slave model that can be added to the keyboard here.
Example code and user manual can be found here.
T-Keyboard S3 Pro Technical Specifications
| SKU | H734 |
| MCU1 | ESP32-S3R8 Dual-core LX7 microprocessor |
| Wireless Connectivity | 2.4 GHz Wi-Fi & Bluetooth5 (LE) |
| Development | Arduino |
| Flash | 16MB |
| PSRAM | 8MB |
| MCU2 | STM32G030F6P6 |
| Flash | 64kb |
| PSRAM | 8kb |
| Onboard Button | Reset Button + WS2812 + Encoder |
0.85 inch All ViewTFT LCD | |
| Resolution | 128(H)RGB X 128(V) |
| Drive IC | GC9107 |
| Active Area | 15.2064(H) X 15.2064 (V)mm |
Package Contents
- 1x T-Keyboard S3 Pro
- 1x USB Type-C Cable 1M (180° rotatable)may)
Pinout

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