Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | Nordic nRF52840 |
| Bluetooth Version | Bluetooth 5.0 (LE) |
| Flash Memory | 1MB QSPI Flash |
| SRAM | 256KB |
| Operating Voltage | 3.3V |
| Input Voltage | 3.3V - 6.0V (via VBUS) |
| USB Interface | USB Type-C |
| Dimensions | 20mm x 17.5mm |
| Weight | 2.5g |
| Compatibility | Arduino IDE, CircuitPython, Zephyr OS |
Anonymous
Mar 27, 2026
Rating: 4/5
Great value, minor pin labeling issue
Excellent performance and low power consumption. My only complaint is that the pinout silkscreen is a bit tiny to read without a magnifier. Otherwise, it's a solid choice for wearable tech.
Anonymous
Mar 26, 2026
Rating: 5/5
Superior to older BLE boards
Upgraded from an older BLE module and the difference in speed and range is noticeable. The USB-C port is also a welcome addition for modern workflows.
Anonymous
Mar 17, 2026
Rating: 5/5
Reliable for prototyping
We use these for rapid prototyping of industrial sensors. The stability of the connection and the extra flash memory make it suitable for complex firmware tests.
Anonymous
Mar 12, 2026
Rating: 5/5
Tiny powerhouse
I used this for a custom keyboard project. The Bluetooth connectivity is stable, and the form factor allowed me to fit it into a very tight case. Highly recommended for hobbyists.
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for compact IoT projects
This board is incredibly small yet powerful. The nRF52840 chip handles Bluetooth 5.0 flawlessly, and the added QSPI flash is a game changer for logging data. Setup with Arduino IDE was straightforward.
Anonymous
Mar 07, 2026
Rating: 4/5
Good but needs patience for beginners
As someone new to embedded systems, getting the drivers installed took some time. Once running, however, the examples worked well. Documentation could be slightly more detailed for absolute beginners.
Q: Can I power this directly from a 5V USB source?
A: Yes, you can connect 5V via the USB Type-C port or the VBUS pin; the onboard regulator will step it down to 3.3V safely.
Q: Does this board support over-the-air (OTA) updates?
A: Yes, the nRF52840 chip fully supports OTA firmware updates via Bluetooth LE.
Q: Does it come with headers pre-soldered?
A: No, this board is shipped without headers to maintain its ultra-low profile. You will need to solder your own headers if required.
Q: What is the maximum current draw for the GPIO pins?
A: Each GPIO pin can source or sink up to 15mA, with a total limit for the port please refer to the nRF52840 datasheet for aggregate limits.
Q: Is the QSPI flash accessible via standard Arduino libraries?
A: Yes, you can access the QSPI flash using libraries like Adafruit_SPIFlash or the native nRF52 Arduino core functions.
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