RoyalBlue54L Feather is a zero-compromise Feather form factor board with all the features you’d expect from a full-sized development kit. At its heart is Nordic’s next-gen nRF54L15, plus an onboard CMSIS-DAP debugger with a UART bridge. Smart power management features from the nPM1300 enable rapid development for your next Bluetooth 6.0, Thread, Matter, Zigbee, Amazon Sidewalk, or proprietary wireless IoT project.

Whether you’re hacking together a DIY smart home solution or testing cutting-edge Bluetooth and Matter protocols in a prototype, the RoyalBlue54L has a robust feature set that makes it a must-have platform for your projects.

Master the Latest Wireless Standards

The RoyalBlue54L Feather is well-suited for any IoT development where power efficiency and wireless connectivity are crucial.

• Connect rechargeable, wearable devices with efficient BLE
• Add accurate tracking to your project with BLE 6.0's new channel sounding
• Develop high efficiency environmental monitoring systems with Thread
• Prototype smart home devices with Matter or Zigbee
• Extend the range of your robotics or drone project with BLE's coded PHY
• Create human-interface devices for gaming or VR with low-latency 4 Mbps PHY

Features & Specifications

Main controller: Nordic nRF54L15:

• 1x ARM Cortex-M33 at 128 MHz
• 1x RISC-V co-processor at 128 MHz
• 1.5 MB of non-volatile memory, 256 KB of RAM
• 2 MB external flash
• Low power consumption, 30-50% better than the nRF52 series
• Integrated CMSIS-DAP debugger with integrated USB-to-UART
• Open source, Zephyr RTOS-based firmware

Wireless:

• Bluetooth 6.0
• Matter 1.3
• Zigbee
• 4 Mbps PHY for Enhanced ShockBurst

Power: Nordic nPM1300

• USB Type-C charging up to 800 mA
• Low power, high accuracy battery gauge
• JST-PH battery connector, same polarity as Adafruit LiPo cells

Ports & Status:

• 1x STEMMA-QT/Qwiic port
• 1x NFC antenna connector
• 1x user LED, blue
• 1x RGB LED (driven by nPM1300)
• 1x user-programmable button
• 1x reset button

Dimensions & Weight:

• 58.4 x 22.9 mm (2.3" x 0.9")
• 10 g (0.35 oz)

Pinout diagram:

Open Source

RoyalBlue54L Feather is open hardware licensed with CERN-OHL-V2-P. We’ve already made our hardware design, Zephyr firmware, and debugger firmware available for you to check out on our GitHub page.

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