CyMouse is a high-performance mouse that supports health monitoring. It is powered by an ESP32-S3FH4R2 controller and equipped with a PAW3395DM-T6QU sensor. It also integrates SpO₂ and heart rate sensors, as well as a built-in display for viewing mouse status and configuring settings.
Due to the nature of my work, I spend long hours sitting in front of a computer. This made me wonder — could there be a product that monitors our health unobtrusively?
Currently, most health monitoring devices are wristbands or smartwatches. However, I personally dislike wearing them while working because they often bump against the keyboard. Health monitoring sensors need close contact with the body — usually the wrist or fingers. In the workplace, the peripheral we touch the most is undoubtedly the mouse.
Thus, the idea of integrating health monitoring into a mouse was born — and that’s how CyMouse came to life.
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Tri-mode connectivity: USB-C wired, Bluetooth, and 2.4G wireless.
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High-performance sensor: PAW3395DM-T6QU sensor, up to 26,000 DPI.
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Quick DPI switching: Dedicated DPI button on the bottom for easy adjustment.
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USB / Wireless Mode:
Due to the ESP32-S3’s USB Full-Speed (12 Mbit/s) limitation, the maximum polling rate is 1 kHz. While this doesn’t fully unleash the PAW3395DM-T6QU’s capabilities, the actual experience is smoother and more precise than my Logitech G102 — more than enough for office use and gaming (including FPS titles).(Performance charts omitted for brevity — same as original)
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Bluetooth Mode:
Performance is slightly limited by BLE protocol constraints but is perfectly sufficient for office use.(Performance charts omitted for brevity — same as original)
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Mouse Weight:
Base weight: 83 g; with battery: approximately 110.4 g.
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Multi-dimensional data: Supports SpO₂, heart rate, fatigue index, microcirculation, blood pressure, cardiac output, peripheral resistance, and more.
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Smart reminders: Vibration-based sedentary alerts.
(Note: Current lighting effects use random colors.)
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Adjustable DPI and scroll speed
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Customizable on-screen animations during movement
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RGB lighting effects
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Health and mouse data history
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Multi-language support
In USB mode, the PC client can:
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View historical health monitoring data
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Manually initiate a new health check
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Display usage statistics for the mouse
Hardware resources are open source. You can find them here:
- Open-source repository: https://oshwlab.com/keivenliao/cymouse
Most components are available on LCSC. If out of stock, you may source alternatives elsewhere. Special parts include:
- Sensor: PAW3395DM-T6QU (with lens model
LM19-LSI) - SpO₂ Module: Custom module supporting blood pressure monitoring; includes 6-pin cable and 3D model matched to its dimensions
- Display: 0.66" OLED,
64×48resolution,16PINinterface (ensure connector matches reference image)
- Battery:
103443-1500mAh(10×34×43 mm), ~48 hrs continuous use; optional if using USB mode only - Battery Cable:
2P 1.25mmmale, 50mm length - USB Cable: Flexible USB 2.0 Type-C for optimal wired performance
- Switches: TTC Dustproof Gold (0.65N), or compatible
- Encoder: TTC Dustproof Gold wheel encoder (12mm height)
- Middle Button: Kailh Silent (9.5mm height)
- Scroll Wheel: Compatible with Logitech G102 / G304 / G305
- Feet Pads: 7mm diameter ice-type dots
- Screws and Nuts: (details same as original)
- FPC Cable:
4P,0.5mmpitch, same direction, 5cm length
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Chip orientation: Ensure
TPS61222DCKRand bothTPS22919QDCKRQ1chips align with PCB markings. -
Connector orientation: Check 4-pin and 6-pin headers carefully.
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SpO₂ FPC cable: Orientation must match the reference; incorrect direction may damage the module!
- Charging Chip: TI
BQ24075RGTR(supports power path management) instead of commonTP4056. - Main Power:
TLV62569DBVRDCDC instead of LDO for reduced heat and higher efficiency. - RGB LED Power:
TPS61222DCKRboosts 3.3V→5V for stable illumination; combined withTPS22919QDCKRQ1load switch for MCU-controlled power-off.
- Model split into top cover, top support, base, and small parts.
- Designed in Autodesk Fusion 360 (source files provided).
- Printable directly via included Bambu Studio project files.
- Recommended material: translucent PETG for best LED lighting effects.
(Assembly and support adjustment details same as original)
- Mouse firmware: Flash the full firmware first. For later updates, use upgrade firmware to retain activation and history.
- Wireless receiver: Any ESP32-S3 (with R2 Flash/RAM) board works. Receiver firmware is open-source and adaptable.
Firmware is closed-source. On first boot, scan the on-screen QR code to obtain a free lifetime activation code.
Tips:
- Avoid using WeChat scanner (browser limitation)
- Use your phone’s camera, browser, or Alipay
- If redirect fails, connect to Wi-Fi hotspot
CyMouse_xxxx(password12345678) to auto-open activation page- Retrieve activation code at: https://cynix.cc/license/activate
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Enter Settings: Hold both side buttons for 3 seconds.
Hardware design includes wireless charging support with reserved module space, though it hasn’t been tested yet. Follow for updates.
- Open components: Hardware (PCB), 3D model, receiver firmware, and PC client.
- Hardware: https://oshwhub.com/keivenliao/cymouse
- Receiver: https://github.com/CynixPub/CyMouse_Receiver
- PC Client: https://github.com/CynixPub/PC_monitor
- User Privacy: Mouse firmware works fully offline; PC client stores data locally.
- Licenses: CC BY-NC-SA 4.0 / GPLv3.
Inspired by the following projects:
- https://github.com/Ghost-Girls/PMW3360-3389-PAW3395_STM32-CH32-APM32
- https://github.com/Li-Dongze/stm32_paw3395_mouse
- https://github.com/kirltrz/PAW3395_Arduino_ESP32
Technically, the PC client could configure all mouse features, but that would defeat the purpose — I wanted all settings adjustable directly on the mouse display. (Also, I’ll admit... a bit of laziness 😄)
Hardware development isn’t easy — I’ve gone through countless trials, especially with 3D model fitting. Here are some of the “sacrifices” made along the way:
If CyMouse has been helpful to you, consider supporting me — it helps improve and maintain this project.
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