{
 "slug": "watchy",
 "name": "Watchy",
 "maker": "SQFMI",
 "category": "wearables",
 "categoryLabel": "Wearables",
 "status": "listed",
 "statusLabel": "Listed by maker",
 "description": "An open-source e-paper smartwatch on an ESP32, with Wi-Fi, Bluetooth and a programmable watch face.",
 "goodFor": "A watch whose face you write yourself.",
 "youNeed": "Arduino or ESP-IDF to change anything.",
 "tradeoff": "Battery capacity is not published; e-paper refresh is slow.",
 "tags": [
  "E-paper",
  "Open source",
  "ESP32",
  "Smartwatch"
 ],
 "price": "US$59 kit with case",
 "priceShort": "$59",
 "priceFrom": null,
 "checked": "2026-09-18",
 "url": "https://gadgets.sh/devices/watchy/",
 "shortUrl": "https://gadgets.sh/watchy",
 "markdown": "https://gadgets.sh/devices/watchy.md",
 "image": "https://gadgets.sh/assets/watchy.jpg",
 "cutout": "https://gadgets.sh/assets/cutouts/watchy.webp",
 "shareCard": "https://gadgets.sh/og/watchy.jpg",
 "shops": [
  {
   "merchant": "SQFMI",
   "label": "Order on Crowd Supply",
   "kind": "market",
   "orderable": true,
   "url": "https://www.crowdsupply.com/sqfmi/watchy?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=watchy&utm_content=api",
   "note": "Sold through Crowd Supply rather than the maker’s own shop."
  },
  {
   "merchant": "SQFMI",
   "label": "Buy from SQFMI",
   "kind": "shop",
   "orderable": true,
   "url": "https://shop.sqfmi.com/products/watchy-kit?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=watchy&utm_content=api",
   "note": "in stock (Shopify product 'Watchy Kit' available: true; both variants available at US$59.00 / US$66.00 with velcro strap; contents: Watchy PCB Version 3, e-ink display, battery, enclosure, strap; linked as the shop from watchy.sqfmi.com) at SQFMI (maker shop, shop.sqfmi.com) when checked on 2026-09-24."
  }
 ],
 "specs": [
  {
   "group": "Core hardware",
   "rows": [
    {
     "label": "Processor",
     "value": "ESP32 with a built-in USB-to-serial adapter for programming",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Display",
     "value": "1.54″ ultra-low-power e-paper · 200 × 200, wide viewing angle",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Radio",
     "value": "Wi-Fi and Bluetooth LE",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Power",
     "value": "Rechargeable; capacity not stated on the project page",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    }
   ]
  },
  {
   "group": "Details from the project page",
   "rows": [
    {
     "label": "Sensors",
     "value": "3-axis accelerometer with gesture detection",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Timekeeping",
     "value": "Real-time clock with calendar and alarm",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Feedback",
     "value": "Vibration motor and four tactile buttons",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Openness",
     "value": "Open-source hardware and software, with many example watch faces",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Cases",
     "value": "Injection-moulded plastic case included; 3D-printable case and strap files published; an anodised aluminium case is US$49",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    }
   ]
  },
  {
   "group": "Buying",
   "rows": [
    {
     "label": "Price",
     "value": "US$59 kit with case on Crowd Supply",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    },
    {
     "label": "Availability",
     "value": "In stock on the day of review",
     "source": "https://www.crowdsupply.com/sqfmi/watchy"
    }
   ]
  }
 ],
 "docs": [
  {
   "label": "Crowd Supply project page",
   "url": "https://www.crowdsupply.com/sqfmi/watchy"
  },
  {
   "label": "Crowd Supply",
   "url": "https://www.crowdsupply.com"
  }
 ],
 "blueprint": {
  "openness": "open-hardware",
  "opennessLabel": "Open hardware",
  "summary": "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.",
  "files": [
   {
    "kind": "schematic",
    "label": "Schematic (PDF)",
    "url": "https://github.com/sqfmi/watchy-hardware/blob/main/WatchySchematic.pdf",
    "format": "PDF"
   },
   {
    "kind": "schematic",
    "label": "KiCad schematic source",
    "url": "https://github.com/sqfmi/watchy-hardware/blob/main/Watchy.kicad_sch",
    "format": "KiCad"
   },
   {
    "kind": "pcb",
    "label": "KiCad PCB layout source",
    "url": "https://github.com/sqfmi/watchy-hardware/blob/main/Watchy.kicad_pcb",
    "format": "KiCad"
   },
   {
    "kind": "gerbers",
    "label": "Gerbers + drill files (folder)",
    "url": "https://github.com/sqfmi/watchy-hardware/tree/main/GERBER",
    "format": "Gerber"
   },
   {
    "kind": "bom",
    "label": "BOM (CSV)",
    "url": "https://github.com/sqfmi/watchy-hardware/blob/main/WatchyBOM.csv",
    "format": "CSV"
   },
   {
    "kind": "enclosure",
    "label": "Community case designs (STL/STEP, multiple)",
    "url": "https://github.com/sqfmi/watchy-cases",
    "format": "STL"
   }
  ],
  "repos": [
   {
    "url": "https://github.com/sqfmi/watchy-hardware",
    "role": "hardware",
    "official": true,
    "license": "MIT",
    "stars": 225,
    "pushed": "2026-01-31"
   },
   {
    "url": "https://github.com/sqfmi/watchy-cases",
    "role": "enclosure",
    "official": true,
    "license": "MIT",
    "stars": 111,
    "pushed": "2024-10-01"
   },
   {
    "url": "https://github.com/sqfmi/Watchy",
    "role": "firmware",
    "official": true,
    "license": "MIT",
    "stars": 2838,
    "pushed": "2025-08-19"
   }
  ],
  "parts": [
   {
    "part": "Espressif ESP32",
    "role": "MCU / Wi-Fi+BLE radio",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf"
   },
   {
    "part": "Bosch BMA423",
    "role": "3-axis accelerometer"
   },
   {
    "part": "NXP PCF8563",
    "role": "I2C RTC",
    "datasheet": "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).",
  "checked": "2026-09-27"
 },
 "sourceFiles": {
  "kicad": [
   {
    "label": "KiCad schematic source",
    "repo": "sqfmi/watchy-hardware",
    "folder": "https://github.com/sqfmi/watchy-hardware/tree/main/",
    "project": "https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_pro",
    "schematics": [
     "https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_sch"
    ],
    "boards": [
     "https://raw.githubusercontent.com/sqfmi/watchy-hardware/main/Watchy.kicad_pcb"
    ]
   }
  ],
  "models": []
 },
 "firmware": [
  {
   "name": "Watchy Library",
   "url": "https://github.com/sqfmi/Watchy",
   "tag": "Watch Framework",
   "description": "Open source E-Paper watch framework with Bluetooth LE, Wi-Fi sync, RTC, accelerometer, and 50+ community watch faces."
  }
 ],
 "chips": [
  "esp32",
  "bma423",
  "pcf8563"
 ]
}