# Watchy (SQFMI)

> An open-source e-paper smartwatch on an ESP32, with Wi-Fi, Bluetooth and a programmable watch face.

- **Category:** Wearables
- **Availability:** Listed by maker
- **Price:** US$59 kit with case, checked 2026-09-18
- **Good for:** A watch whose face you write yourself.
- **You'll need:** Arduino or ESP-IDF to change anything.
- **Trade-off:** Battery capacity is not published; e-paper refresh is slow.
- **Page:** https://gadgets.sh/devices/watchy/

## Where to buy

| Shop | Status | Link |
|---|---|---|
| SQFMI | Orderable | https://www.crowdsupply.com/sqfmi/watchy?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=watchy&utm_content=api |
| SQFMI | Orderable | https://shop.sqfmi.com/products/watchy-kit?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=watchy&utm_content=api |

## Blueprint

**Open hardware.** Watchy hardware is fully open: KiCad schematic/PCB source, Gerbers, BOM and a schematic PDF are published on GitHub, plus a separate repo of maker-contributed case STL/STEP files.

### Design files

- schematic: [Schematic (PDF)](https://github.com/sqfmi/watchy-hardware/blob/main/WatchySchematic.pdf) (PDF)
- schematic: [KiCad schematic source](https://github.com/sqfmi/watchy-hardware/blob/main/Watchy.kicad_sch) (KiCad)
- pcb: [KiCad PCB layout source](https://github.com/sqfmi/watchy-hardware/blob/main/Watchy.kicad_pcb) (KiCad)
- gerbers: [Gerbers + drill files (folder)](https://github.com/sqfmi/watchy-hardware/tree/main/GERBER) (Gerber)
- bom: [BOM (CSV)](https://github.com/sqfmi/watchy-hardware/blob/main/WatchyBOM.csv) (CSV)
- enclosure: [Community case designs (STL/STEP, multiple)](https://github.com/sqfmi/watchy-cases) (STL)

### Source repositories

- [sqfmi/watchy-hardware](https://github.com/sqfmi/watchy-hardware) — hardware, MIT, ★225
- [sqfmi/watchy-cases](https://github.com/sqfmi/watchy-cases) — enclosure, MIT, ★111
- [sqfmi/Watchy](https://github.com/sqfmi/Watchy) — firmware, MIT, ★2838

### Key parts

| Part | Role | Datasheet |
|---|---|---|
| Espressif ESP32 | MCU / Wi-Fi+BLE radio | https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf |
| Bosch BMA423 | 3-axis accelerometer |  |
| NXP PCF8563 | I2C RTC | https://www.nxp.com/products/analog-and-mixed-signal/real-time-clocks/real-time-clock-calendar-with-i2c-bus:PCF8563 |

_Notes:_ All GitHub file/folder links curl-verified 200. Hardware source lives in the separate sqfmi/watchy-hardware repo, not the sqfmi/Watchy Arduino firmware/library repo (also official, listed for completeness).

### Raw source files

Direct links an agent or KiCad can open (the viewer on the page reads the same files).

- KiCad project **KiCad schematic source** (sqfmi/watchy-hardware): [Watchy.kicad_pro](https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_pro), [Watchy.kicad_sch](https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_sch), [Watchy.kicad_pcb](https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_pcb)

## Specifications

### Core hardware

| | |
|---|---|
| Processor | ESP32 with a built-in USB-to-serial adapter for programming |
| Display | 1.54″ ultra-low-power e-paper · 200 × 200, wide viewing angle |
| Radio | Wi-Fi and Bluetooth LE |
| Power | Rechargeable; capacity not stated on the project page |

### Details from the project page

| | |
|---|---|
| Sensors | 3-axis accelerometer with gesture detection |
| Timekeeping | Real-time clock with calendar and alarm |
| Feedback | Vibration motor and four tactile buttons |
| Openness | Open-source hardware and software, with many example watch faces |
| Cases | Injection-moulded plastic case included; 3D-printable case and strap files published; an anodised aluminium case is US$49 |

### Buying

| | |
|---|---|
| Price | US$59 kit with case on Crowd Supply |
| Availability | In stock on the day of review |

## Firmware & community

- [Watchy Library](https://github.com/sqfmi/Watchy) — Open source E-Paper watch framework with Bluetooth LE, Wi-Fi sync, RTC, accelerometer, and 50+ community watch faces.

## Documentation

- [Crowd Supply project page](https://www.crowdsupply.com/sqfmi/watchy)
- [Crowd Supply](https://www.crowdsupply.com)

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Source: gadgets.sh · https://gadgets.sh/devices/watchy/ · JSON: https://gadgets.sh/api/v1/devices/watchy.json