Adafruit ItsyBitsy nRF52840 Express
Best compact microcontroller for space-constrained wireless IoT projects.
This tiny powerhouse packs serious Bluetooth connectivity and ample storage into a footprint small enough for the most cramped enclosures. You sacrifice the expansive pin count of larger boards, but you gain a versatile, high-performance brain that handles complex wireless projects without breaking a sweat.
$19.95
at
Electromaker
Who it's for
- Developers building complex, wireless, and power-efficient IoT projects
- Prototypers working within tight physical space constraints
- Beginners seeking fast, accessible coding and rapid iteration
Who should skip it
- Novices intimidated by advanced wireless stack configuration
- Makers requiring extensive I/O for complex peripheral integration
- Budget-conscious hobbyists prioritizing low-cost hardware solutions
Performance breakdown
Form Factor Efficiency
Remarkably dense layout packs serious wireless power into a tiny footprint.
Wireless Versatility
Seamlessly handles both central and peripheral roles for complex IoT ecosystems.
Development Flexibility
Dual support for CircuitPython and Arduino caters to every developer preference.
Onboard Storage Capacity
Generous 2MB QSPI flash provides ample room for extensive data logging.
Programming Accessibility
Drag-and-drop UF2 bootloader makes code deployment fast and frustration-free.
I/O Connectivity
Solid selection of GPIO and PWM pins for most compact projects.
Key Specs
Dimensions
36.0mm x 17.78mm x 5.3mm
Weight
3.0g
Processor
Nordic nRF52840 Cortex M4 @ 64 MHz
RAM
256 KB
Flash Memory
1 MB
Onboard Storage
2 MB QSPI Flash
GPIO
21 pins
Analog Inputs
6
PWM Outputs
12
Operating Voltage
3.3V
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