Project Name: SmartKB32_v2
Project Author: Jia Jiawen JJW
Created a unique keyboard that is rarely seen in the market!
This is a 32-key smart keyboard, using ESP32-S3 as the main control design.
With a custom knob, it can handle4 major application scenarios! It has7 major functions!
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Writing code, designing, etc. work scenarios
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Remote control of home devices, etc. lifestyle scenarios
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Can control various DIY devices,increasing playability
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Daily app switching, gaming, work and entertainment switch in 1 second
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The keyboard hasthree layers of default key mapping tables, each layer can achievecustom macros: Pre-set dozens of APP shortcuts and game shortcuts, with pop-up prompts on the screen during switching
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Supportssmart home devicewireless control(supports control of self-developed devices)
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Supportsfingerprint recognition: One-click input of account passwords, computer boot passwords
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One-click sleep function
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One-click boot function
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Supportsmusic control to start, pause, previous and next songs, etc.
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Also added a buzzer, audio chip, etc., to achieve multi-control functionality
Additionally designed as a gaming keyboard, can trigger combos with one click.
Keyboards on the market, the number of macro definitions cannot fully meet the needs of each software.
Many customized keyboards have knob functions, but most only adjust computer volume, screen brightness, etc., and feel that they have not maximized the efficiency of the knob…
I combined the Bluetooth keyboard with the SmartKnob design, merging them into one.
Also integrated the Surface dial, using a left-hand design to improve the utilization rate of the smart knob.
Finally, combined with the mouse and keyboard’s multiple key mapping tables to meet faster work demands.
The hardware and software designs are as follows.
Peripheral Schematic Diagram
Control Schematic Diagram
PCB Diagram with Color Silk Screen Process
2804 Motor Schematic Diagram
2804 Motor PCB Diagram
GC9A01 Screen Schematic Diagram
GC9A01 Screen PCB Diagram
Key Area Introduction
UI Interface Part Display
Scroll up and down to view the complete design drawings
Including keyboard area introduction + UI interface
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Main control adopts ESP32-S3, auxiliary control ESP12F design.
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Realized communication with self-made devices throughespnow
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UtilizedMPU6050 for foc knob closed-loop control
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UtilizedWM8978 for audio functionality
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Utilized74HC165 chip to sample the state of each key
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Utilized74HC595 chip to control the status indicator lights
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UtilizedDS1302 chip for timing function accuracy
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UtilizedMax4466 for audio sampling
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Adopteddual Type-C ports design, one port for 12V power supply, the other port has a reversible design with one as the main control OTG interface and the other as the auxiliary control serial to USB interface, both ports have corresponding indicator lights for distinction
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Communicated with computers viaBluetooth, achieving Bluetooth keyboard functionality.
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Throughwifi and lighting technology to achieve remote control via mobile phone, as well as interaction with Xiaomi devices, and supports voice control via Xiao Ai speaker
The keymap.cpp defines a dual-layer default mapping table:
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One layer for APP shortcut key mapping
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One layer for game shortcut key mapping
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One layer for function shortcut key mapping
The source code is open-sourced, refer to the end of the article for the 【Open Source Material Download Guide】 section.
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Keyboard PCBboard thickness: 1.6mm
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Screen and motor driver board PCBboard thickness: 1.0mm
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Keyboard positioning platethickness: 1.5mm
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Motor is fixed usingM2.5*27mm copper pillars
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Cost details can be found in Chapter 8
This project is open-sourced: 3D models, schematics, PCBs, program code, burning files.
If you need【Project source files + video demonstration files】, please “scan” or “copy the link” to enter the open-source page to view.
Copy the open-source URL, open it in any browser: https://oshwhub.com/szszj/SmartKB32v2
If you have any questions, you can comment and consult the original author under the open-source project!
The total cost of this project is around 2400 yuan, but!
The author participated in the event held by Lichuang called Spark Plan Activity, which reimbursed the author 2000 yuan of material costs.
Therefore, the author actually spent: around 400 yuan.
Is this considered spending a small amount of money to do great things? 
*This article reprints user creations from the “Lichuang Open Source Hardware Platform.” If there is infringement, please contact us for deletion.
