Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | Nordic nRF52840 SoC |
| Compatibility | nice!nano V2.0 Pinout Compatible |
| Wireless Connectivity | Bluetooth 5.0, BLE, Thread, Zigbee |
| USB Interface | Native USB Type-C with Charging Support |
| Power Management | Integrated Li-Po Battery Charging Circuit |
| Flash Memory | 1 MB Internal Flash |
| RAM | 256 KB SRAM |
| Operating Voltage | 3.3V Logic Level |
| Dimensions | 33mm x 18mm x 3mm |
| Development Environment | Arduino IDE, Zephyr OS, CircuitPython |
Anonymous
Mar 29, 2026
Rating: 5/5
Reliable Bluetooth Performance
Using this for a home automation sensor node. The connection stability is top-notch, and the low power consumption extends battery life significantly.
Anonymous
Mar 10, 2026
Rating: 5/5
Perfect for Custom Keyboards
This board is a drop-in replacement for the nice!nano and works flawlessly with QMK and ZMK. The battery charging feature is a huge plus for wireless builds.
Anonymous
Mar 10, 2026
Rating: 5/5
Seamless Arduino Integration
Flashed via Arduino IDE without any issues. The power management IC handles my 500mAh battery perfectly. Highly recommended for beginners and pros alike.
Anonymous
Mar 03, 2026
Rating: 5/5
Great Value for Prototyping
I use these for rapid IoT prototyping. The native USB support makes flashing incredibly fast, and the Bluetooth range is impressive for such a small form factor.
Anonymous
Mar 02, 2026
Rating: 4/5
Solid Board, Minor Documentation Gaps
Hardware is excellent and stable. I deducted one star because the specific pinout diagram for the charging status LED wasn't immediately clear in the included docs, but community forums helped.
Anonymous
Mar 01, 2026
Rating: 5/5
Best Nice!Nano Alternative
Finally found a reliable alternative that includes charging circuitry onboard. Saved me so much space on my PCB design. Will buy more.
Q: What is the maximum battery capacity supported by the charging circuit?
A: The integrated charging manager safely supports Lithium-Polymer batteries ranging from 100mAh up to 2000mAh. Please ensure your battery has a standard JST-PH 2.0mm connector.
Q: Does this board support UF2 bootloader out of the box?
A: Yes, the Promicro NRF52840 comes pre-flashed with a UF2 bootloader, making it drag-and-drop compatible for firmware updates.
Q: Is this compatible with the ZMK firmware for mechanical keyboards?
A: Absolutely. Since it shares the same pinout and architecture as the nice!nano V2.0, it is fully compatible with ZMK firmware configurations.
Q: Can I power this board directly via the 5V pin if not using USB?
A: It is recommended to power the board via the VIN pin (3.3V-6V range) or the USB-C port. Directly feeding 5V into the 3.3V pin may damage the microcontroller.
Q: Does the package include headers soldered onto the board?
A: No, the board is shipped without headers to allow for flexible mounting options (SMD or through-hole). You will need to solder your own headers based on your project needs.
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