Promicro NRF52840 Development Board – Nice!Nano V2 Compatible

Take your wireless keyboard and embedded projects to the next level with the Promicro NRF52840 Development Board, a drop-in compatible replacement for the popular Nice!Nano V2. Powered by the Nordic Semiconductor NRF52840 SoC, this compact Pro Micro form-factor board packs Bluetooth 5.0 Low Energy (BLE), onboard LiPo battery charging management, and USB-C connectivity into a tiny footprint that fits directly into most Pro Micro footprint PCBs and split keyboard builds.

Key Features

Nordic NRF52840 SoC – ARM Cortex-M4 processor with FPU, 1 MB Flash, 256 KB RAM, and integrated Bluetooth 5.0 BLE for reliable wireless performance
Nice!Nano V2 Compatible – Designed to be a pin-compatible drop-in for Nice!Nano V2 boards; works seamlessly with ZMK firmware and most split keyboard PCBs
Onboard LiPo Battery Charging – Built-in charging management circuit lets you power and recharge a single-cell LiPo battery directly via USB-C — no external charger needed
USB-C Connector – Modern, reversible USB-C port for programming, data transfer, and battery charging
Pro Micro Form Factor – Industry-standard footprint ensures compatibility with a wide range of existing PCB designs and keyboard cases
Bluetooth 5.0 BLE – Low-energy wireless connectivity ideal for wireless keyboards, mice, IoT prototypes, and wearable projects
Rich GPIO – Multiple digital I/O, SPI, I²C, UART, and PWM pins available for versatile prototyping and hardware development
ZMK & Arduino Compatible – Supports ZMK keyboard firmware out of the box and is compatible with the Arduino IDE via the Adafruit nRF52 board package

Who Is This For?

Whether you're building a custom wireless split keyboard, experimenting with BLE IoT prototypes, or looking for a reliable Nice!Nano V2 alternative at a great price, the Promicro NRF52840 board delivers the performance and compatibility you need. It's equally suited for hobbyists, makers, and developers who want a capable wireless microcontroller on a familiar footprint.

What's in the Box?

1 × Promicro NRF52840 Development Board (Nice!Nano V2 Compatible)

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Frequently Asked Questions

Q: Is the Promicro NRF52840 board a true drop-in replacement for the Nice!Nano V2?

A: Yes — the Promicro NRF52840 Development Board is designed to be pin-compatible with the Nice!Nano V2, meaning it fits directly into PCB footprints and keyboard cases that were designed for the Nice!Nano V2. It also supports ZMK firmware, making the transition seamless for wireless keyboard builds.

Q: What battery does the onboard charging circuit support?

A: The onboard charging management circuit supports single-cell 3.7 V LiPo (lithium polymer) batteries. You can connect a LiPo battery to the dedicated battery pads and charge it directly through the USB-C port — no external charger is required.

Q: Can I program the Promicro NRF52840 with the Arduino IDE?

A: Yes. By installing the Adafruit nRF52 board support package in the Arduino IDE, you can program the NRF52840 using familiar Arduino syntax. It also natively supports ZMK firmware for wireless keyboard projects and CircuitPython for rapid prototyping.

Q: What wireless standard does the NRF52840 use?

A: The Nordic NRF52840 features integrated Bluetooth 5.0 Low Energy (BLE), which provides a stable, low-power wireless connection ideal for keyboards, wearables, and IoT devices. It offers an extended range and improved data throughput compared to older BLE versions.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.