M5Stack Stamp-C5 Puts Wi-Fi 6 in a $6.50 Module

M5Stack Stamp-C5 Brings Dual-Band Wi-Fi 6 to a Fingertip

Every so often a tiny board arrives that packs an absurd amount of connectivity into almost no space, and the M5Stack Stamp-C5 is exactly that. Announced July 10, 2026, this 19.1 x 17.6 mm module is built on Espressif's ESP32-C5 and brings 2.4/5 GHz dual-band Wi-Fi 6, Bluetooth LE 5, and 802.15.4 (Zigbee/Thread) to makers — for a jaw-dropping $6.50.

• The chip: Espressif ESP32-C5, single-core 32-bit RISC-V up to 240 MHz, with 4MB flash
• The radios: Dual-band 2.4/5 GHz Wi-Fi 6, BLE 5, and 802.15.4 for Zigbee/Thread/Matter
• The I/O: Up to 19 GPIO (11 on 2.54 mm castellated headers, 8 on an FPC connector), USB-C, 3.7V battery input, IPEX antenna connector
• The price: $6.50 for the module, $7.95 for the DIP variant with header pins

Why 5 GHz Wi-Fi 6 in a Microcontroller Is a Big Deal

For years, hobbyist Wi-Fi microcontrollers were stuck on crowded 2.4 GHz. The ESP32-C5 changes that by adding a clean 5 GHz band and Wi-Fi 6 efficiency, which means less interference and better throughput for compact IoT nodes living in dense wireless environments. Pair that with 802.15.4 support — the physical layer under Zigbee, Thread, and Matter — and a single fingertip-sized module can talk to nearly any smart-home ecosystem. That multi-protocol flexibility is what makes the Stamp-C5 punch far above its size and price.

Small Board, Serious I/O

Despite the postage-stamp footprint, M5Stack exposes up to 19 GPIO — eleven on standard 2.54 mm castellated headers and eight more on an FPC extension connector — alongside USB Type-C and a 3.7V battery input for portable projects. The single-core RISC-V core runs at up to 240 MHz with 4MB of flash, plenty for sensor hubs, Matter accessories, or battery-powered environmental nodes. An onboard IPEX connector lets you attach an external antenna when you need extra range. It slots naturally into the same maker toolbox as other compact ESP32 boards we have featured.

The Bottom Line for Makers

At $6.50, the Stamp-C5 makes dual-band Wi-Fi 6 and Thread/Matter connectivity effectively an impulse purchase, and the DIP variant at $7.95 drops it straight onto a breadboard. For anyone building compact IoT devices in 2026, it is one of the easiest recommendations to make — a tiny, affordable, future-proof radio module that belongs in every parts bin. It is a standout in this week's mini computers roundup.

Sources: CNX Software — July 10, 2026; M5Stack Store — July 2026.