The developer is creating a handheld radio device that connects via Bluetooth to a smartphone to send voice messages to an AI agent system. The first version uses the M5Stack Cardputer-Adv, featuring an ESP32-S3 chip, a 1.14-inch screen, a microphone, and a 1500 mAh battery.
A second, more compact version utilizes the M5StickS3, which lacks a keyboard and includes a 250 mAh battery. The developer estimates this device will last for one week on a single charge. The interface relies on animations and sound signals to confirm message transmission.
To improve ergonomics, the developer transitioned from AI-generated code to manual sculpting with clay. The process involves 3D-printing a base mold with markers for buttons and ports, sculpting the clay to fit the hand, and using photogrammetry via RealityScan to digitize the shape.
The printing process for the sculpting kit, including custom tools like scrapers and rakes, took 3.1 hours and consumed 98 grams of PLA filament. An additional 28 minutes were required to print the mold for the M5StickS3 device.
