CircuitMess Chatter 2.0 DIY Encrypted Communicators

Chatter 2.0 from CircuitMess is a kit that builds two matched wireless communicators — devices that send text messages directly to each other over radio, with no Wi-Fi network, no cell service and no account of any kind. Each unit comprises a main circuit board, battery holder and cover, button caps, metal bolts, an on-off cap and acrylic casing, and both go together without soldering following a build guide with over 100 photographs.

The technology underneath is LoRa, a long-range, low-power radio protocol used in real industrial and agricultural sensor networks. That makes Chatter unusually good value as a teaching tool, because it gives students a working, hands-on introduction to a genuinely current wireless standard rather than a toy simplification. Messages between the two units are encrypted, so a unit on how radio works can naturally extend into a conversation about why encryption exists and what it protects — a topic most homeschool curricula only ever cover in the abstract.

Building the pair teaches radio communication, signal processing and electronics from the component level up. Students learn why range and power draw trade off against each other, what an antenna is doing, and how a message is encoded before it is sent. Then the coding guide takes them further: drawing and writing on the screen, generating sounds, and extending the devices well past basic texting using CircuitBlocks, which supports both block-based and written code.

Practically, the two-device format is what makes this kit stick. Two siblings, or a student and a friend, end up with a working off-grid communication system they built themselves and can actually use across a property or neighbourhood. For homeschoolers it suits a middle-school through high-school unit on wireless communication, computer networks or electrical engineering. At $109 it is a mid-range CircuitMess kit and one of the few that produces two finished devices.