Sparkfun Raspberry Pi Radio Module 2 (RMC20452T)

The Raspberry Pi Radio Module 2 (RMC20452T) is a compact and versatile wireless module designed for seamless integration into custom PCBs and microcontroller projects. Featuring the Infineon CYW43439 combo chipset, it offers single-band 2.4 GHz Wi-Fi 4 (802.11n) and Bluetooth 5.2 (Classic + LE) in a SISO architecture. The module includes an integrated internal PA, LNA, and a shared 2.4 GHz antenna, simplifying wireless communication and reducing RF design complexity. With full modular certification, it helps OEMs avoid costly radio/regulatory certification processes.

This module is perfect for projects requiring reliable wireless communication. It supports data rates of up to 96 Mbps over 20 MHz Wi-Fi channels, making it suitable for streaming and data-heavy applications. Bluetooth capabilities allow for a range of up to 100 meters for Class 1 devices and 10 meters for Class 2, providing flexibility in connectivity options.

One of the standout features is its power-saving modes, such as Power Save PM1, which averages around 1.19 mA, significantly extending battery life in portable applications. The active current draw is approximately 43 mA during reception at –50 dBm and 271 mA during transmission at 16 dBm, making it energy-efficient for continuous use.

The module's physical dimensions are compact, measuring 16.5 mm × 14.5 mm with a profile height of about 2.55 mm, making it ideal for space-constrained designs. It connects via a low-pin-count gSPI host interface and provides additional I/O flexibility with three host-controlled GPIOs. Its robust design is suitable for a wide temperature range from –30°C to +70°C, ensuring reliability in various environments.

Moreover, the module is fully compatible with the Raspberry Pi Pico SDK, offering extensive software support for developers. Its long production lifetime, guaranteed through at least January 2036, ensures ongoing availability for long-term projects.