{
 "slug": "chatter-2-0",
 "name": "Chatter 2.0",
 "maker": "CircuitMess",
 "category": "kits",
 "categoryLabel": "DIY & play",
 "status": "listed",
 "statusLabel": "Listed by maker",
 "description": "A kit for building a pair of off-grid text messengers.",
 "goodFor": "Build a pair of direct LoRa text messengers.",
 "youNeed": "Kit assembly and 3 × AA batteries per device.",
 "tradeoff": "Check the board revision before using earlier Chatter or Meshtastic firmware.",
 "tags": [
  "Pair of devices",
  "LoRa messaging",
  "DIY kit",
  "CircuitBlocks"
 ],
 "price": "US$149 pair",
 "priceShort": "$149",
 "priceFrom": null,
 "checked": "2026-09-15",
 "url": "https://gadgets.sh/devices/chatter-2-0/",
 "shortUrl": "https://gadgets.sh/chatter-2-0",
 "markdown": "https://gadgets.sh/devices/chatter-2-0.md",
 "image": "https://gadgets.sh/assets/chatter-2-0.jpg",
 "cutout": "https://gadgets.sh/assets/cutouts/chatter-2-0.webp",
 "shareCard": "https://gadgets.sh/og/chatter-2-0.jpg",
 "shops": [
  {
   "merchant": "CircuitMess",
   "label": "Buy from CircuitMess",
   "kind": "shop",
   "orderable": true,
   "url": "https://circuitmess.com/products/chatter-2-0?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=chatter-2-0&utm_content=api",
   "note": "In stock at CircuitMess when checked on 2026-09-24."
  },
  {
   "merchant": "Amazon",
   "label": "Buy from Amazon",
   "kind": "shop",
   "orderable": true,
   "url": "https://www.amazon.com/dp/B0FMKJL6CY?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=chatter-2-0&utm_content=api",
   "note": "In stock at Amazon when checked on 2026-09-24."
  },
  {
   "merchant": "STEMfinity",
   "label": "Buy from STEMfinity",
   "kind": "shop",
   "orderable": true,
   "url": "https://stemfinity.com/products/circuitmess-chatter-2-0?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=chatter-2-0&utm_content=api",
   "note": "In stock at STEMfinity when checked on 2026-09-24."
  }
 ],
 "specs": [
  {
   "group": "Build and package",
   "rows": [
    {
     "label": "Project",
     "value": "Pair of DIY LoRa text communicators; no Wi-Fi or cellular network needed",
     "source": "https://circuitmess.com/products/chatter-2-0"
    },
    {
     "label": "Build estimate",
     "value": "About 2 hours for both devices; beginner-friendly, ages 9+",
     "source": "https://circuitmess.com/products/chatter-2-0"
    },
    {
     "label": "Included",
     "value": "Boards, acrylic cases, battery holders/covers, switch caps, button caps and bolts",
     "source": "https://circuitmess.com/products/chatter-2-0"
    },
    {
     "label": "Assembly tool",
     "value": "Screwdriver included in the 2025 booklet’s package list",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf"
    }
   ]
  },
  {
   "group": "Hardware in the linked v2.1 drawing",
   "rows": [
    {
     "label": "Controller",
     "value": "WT32-S1 module",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "Display",
     "value": "Drawing labels a 1.77-inch TFT with a 14-pin connection",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "Power",
     "value": "3 × 1.5 V AA cells per device; six for the pair",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "USB",
     "value": "USB-C with CH340C serial interface",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "Radio",
     "value": "Module marked VGdd79S868N0S1 with a PCB antenna",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "Battery reading",
     "value": "Drawing notes battery voltage cannot be read while USB is connected",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    },
    {
     "label": "Buzzer connection",
     "value": "GPIO22 in the linked v2.1 drawing",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
    }
   ]
  },
  {
   "group": "Use and programming",
   "rows": [
    {
     "label": "First connection",
     "value": "Use the Friends app to discover another Chatter and exchange friend requests",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf"
    },
    {
     "label": "Range claim",
     "value": "Maker estimates roughly 2 km under optimal conditions; obstacles and surroundings affect range",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf"
    },
    {
     "label": "Coding",
     "value": "CircuitBlocks; booklet also lists Python and Arduino C++",
     "source": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf"
    },
    {
     "label": "Custom projects",
     "value": "Screen text/graphics and buzzer programs",
     "source": "https://circuitmess.com/products/chatter-2-0"
    },
    {
     "label": "Encryption",
     "value": "Advertised by the maker; cipher, key handling and security evaluation remain unspecified",
     "source": "https://circuitmess.com/products/chatter-2-0"
    }
   ]
  },
  {
   "group": "Revision check",
   "rows": [
    {
     "label": "Earlier library pin map",
     "value": "Chatter2-Library assigns buzzer GPIO19; compatibility with the current board needs checking",
     "source": "https://raw.githubusercontent.com/CircuitMess/Chatter2-Library/master/src/Pins.hpp"
    }
   ]
  }
 ],
 "docs": [
  {
   "label": "Chatter 2.0 product",
   "url": "https://circuitmess.com/products/chatter-2-0"
  },
  {
   "label": "Exact 2.0 guide and downloads",
   "url": "https://circuitmess.com/blogs/resources/chatter-2-0-build-guide"
  },
  {
   "label": "Chatter 2.0 creator booklet PDF",
   "url": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf"
  },
  {
   "label": "Chatter 2.0 schematic PDF, internal v2.1",
   "url": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf"
  },
  {
   "label": "CircuitBlocks online editor — sign-in required",
   "url": "https://code.circuitmess.com/"
  },
  {
   "label": "Older Chatter2 library pin map",
   "url": "https://raw.githubusercontent.com/CircuitMess/Chatter2-Library/master/src/Pins.hpp"
  },
  {
   "label": "Older Chatter2 firmware source; match revision first",
   "url": "https://github.com/CircuitMess/Chatter2-Firmware"
  },
  {
   "label": "Meshtastic documentation for earlier Chatter boards",
   "url": "https://meshtastic.org/docs/hardware/devices/community-supported/chatter/"
  }
 ],
 "blueprint": {
  "openness": "schematics",
  "opennessLabel": "Schematics published",
  "summary": "Schematic PDF and closed-source-looking firmware repo (no license file) are published; no editable PCB source found.",
  "files": [
   {
    "kind": "schematic",
    "label": "Chatter 2.0 schematic (PDF)",
    "url": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_schema.pdf",
    "format": "PDF"
   },
   {
    "kind": "manual",
    "label": "Chatter 2.0 build booklet (PDF)",
    "url": "https://cdn.shopify.com/s/files/1/0552/3269/2430/files/Chatter_2.0_booklet_2025_PRINT.pdf",
    "format": "PDF"
   }
  ],
  "repos": [
   {
    "url": "https://github.com/CircuitMess/Chatter2-Firmware",
    "role": "firmware",
    "official": true,
    "license": null,
    "stars": 18,
    "pushed": "2023-08-13"
   }
  ],
  "parts": [
   {
    "part": "LoRa/Wi-Fi module marked \"VGdd79S868N0S1\"",
    "role": "radio"
   }
  ],
  "notes": "Schematic PDF verified 200. CircuitMess/Chatter2-Firmware repo exists (18 stars) but gh api reports no license field. No KiCad/Gerber files found in the repo. LoRa/Wi-Fi module marked \"VGdd79S868N0S1\": per drawing; exact part not otherwise identified",
  "checked": "2026-09-27"
 },
 "sourceFiles": null,
 "firmware": [],
 "chips": [
  "ch340"
 ]
}