Introducing the Raspberry Pi Radio Module 2 (RM2): A New Way to Add Wireless Connectivity
Raspberry Pi has just released a brand new product that is set to make adding wireless connectivity to your projects easier than ever. The Raspberry Pi Radio Module 2 (RM2) is a pre-certified Wi-Fi and Bluetooth module designed specifically for use with RP2040 and RP2350 based boards like the Raspberry Pi Pico. Priced at just $4, this tiny module packs a punch, offering 2.4 GHz Wi-Fi and Bluetooth 5.0 capabilities in a compact form factor. Available now from Raspberry Pi Approved Resellers, the RM2 is an exciting addition to the Raspberry Pi ecosystem, providing developers with a turnkey solution for wireless connectivity.
Key Features
At the heart of the RM2 is the CYW43439 wireless chip from Infineon, the same chip used in the Raspberry Pi Pico W and 2W. This ensures reliable and robust wireless performance. The module supports both 2.4 GHz Wi-Fi and Bluetooth 5.0, making it versatile for a wide range of applications. One of the standout features of the RM2 is that it is pre-certified, which means developers can integrate it into their products without worrying about the complexities of wireless certification. This can save significant time and effort in the product development process. Additionally, the RM2 features an integrated antenna, eliminating the need for an external antenna and simplifying the design. Its small form factor allows it to be soldered directly onto a PCB, making it ideal for compact designs.
Detailed Specifications
The RM2 is packed with features that make it a powerful yet easy to use wireless module. Let’s dive into the detailed specifications that set it apart:
- Wi-Fi Capabilities: The RM2 supports Wi-Fi 4 (802.11n) on a single-band 2.4 GHz frequency. It uses 20 MHz channels and can achieve data rates up to 96 Mbps (PHY rate), offering sufficient bandwidth for most IoT and embedded applications. This makes it a solid choice for connecting to standard Wi-Fi networks without the complexity of dual-band systems.
- Bluetooth Features: With support for Bluetooth 5.2, the RM2 includes both Bluetooth Classic and Bluetooth Low Energy (LE) modes. This dual-mode capability provides flexibility, use Classic for higher data throughput or LE for power efficient, short range communication. It’s perfect for everything from wireless audio to battery powered sensors.
- Software Compatibility: The RM2 offers full software compatibility with the Pico W and Pico 2 W SDK, a huge advantage for developers already working within Raspberry Pi’s ecosystem. Whether you’re coding in MicroPython or C/C++, you can leverage existing libraries and tools, making integration smooth and efficient.
- GPIO Expander: A simple GPIO expander feature provides three host-controlled GPIOs, adding extra I/O capabilities to your projects. Need to connect additional sensors, actuators, or peripherals? These pins give you the flexibility to expand without requiring a separate expander chip.
- Efficient Antenna Design: The RM2 boasts an efficient single-antenna design with an integrated internal PA (Power Amplifier) and LNA (Low Noise Amplifier). This setup enhances signal range and reliability, ensuring strong performance without the hassle of an external antenna. PlusThe design also minimizes I/O overhead**, keeping your project’s resource demands low.
- Compact and Lightweight: Measuring just 14.5mm (W) x 16.7mm (L) x 2.6mm (H) and weighing around 1g, the RM2 is incredibly compact. Its small size and light weight make it an ideal fit for space constrained projects, from wearables to tiny IoT devices.
These specs showcase the RM2’s blend of power, simplicity, and efficiency, making it a go to solution for wireless connectivity in microcontroller based projects.
Using the RM2 in Existing Boards & Projects
If you’re already working with RP2040 or RP2350 based boards like the Raspberry Pi Pico, adding the RM2 to your project is a breeze. The module can be soldered directly onto your PCB, and its tiny footprint ensures it won’t clutter your design. With the RM2, you can unlock wireless features like:
- Remote Control: Manage devices wirelessly with ease.
- Data Logging: Send sensor data to a server or device over Wi-Fi or Bluetooth.
- IoT Connectivity: Build smart devices that connect to the Internet of Things.
Imagine creating a wireless weather station, a Bluetooth controlled robot, or a Wi-Fi-enabled home automation system, the RM2 makes these projects accessible and straightforward.
Software Support
The RM2 shines with its robust software support. Fully integrated into Raspberry Pi’s ecosystem, it works seamlessly with MicroPython and C/C++ through the Pico W and Pico 2 W SDKs. The wealth of documentation, tutorials, and community resources available from Raspberry Pi ensures you’ll never be stuck. Whether you’re a beginner or a seasoned developer, the RM2’s software compatibility makes it easy to get started and scale up.
Conclusion
The Raspberry Pi Radio Module 2 is a game changer for anyone looking to add wireless connectivity to their projects. Its combination of Wi-Fi 4, Bluetooth 5.2, GPIO expansion, and a compact design, all for just $4 USD, makes it a versatile and affordable option. Paired with Raspberry Pi’s trusted ecosystem, the RM2 is ready to power your next IoT device, remote sensor, or creative prototype. Grab one today and start exploring the wireless possibilities!
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