Arduino Uno R4
Best connected controller for advanced IoT and robotics hobbyists.
This board finally brings the classic hobbyist staple into the modern era with integrated wireless connectivity and a clever LED matrix. While it retains the familiar shield footprint, the jump to a more powerful processor means you’ll need to navigate a slightly steeper learning curve for advanced projects.
$25.19
at
Jameco Electronics
Who it's for
- IoT developers needing integrated wireless connectivity
- Makers requiring extra processing power for complex projects
- Hobbyists with existing collections of 5V shields
Who should skip it
- Budget-conscious students seeking the most affordable entry point
- Beginners intimidated by managing dual-chip firmware updates
- Developers relying on extensive, long-established library support
Performance breakdown
IoT Connectivity
Integrated ESP32-S3 module makes wireless project deployment seamless and highly reliable.
Shield Compatibility
Maintains excellent support for legacy UNO R3 hardware and expansion shields.
Processing Power
Significant performance leap over the R3 handles complex logic with ease.
Peripheral Versatility
Onboard DAC, CAN BUS, and OP AMP cover most advanced prototyping needs.
Visual Feedback
The integrated LED matrix provides instant, creative debugging and status visualization.
Power Robustness
High 24V input tolerance allows for direct integration with industrial-grade actuators.
Key Specs
Form Factor
UNO (UNO R3 compatible)
Operating Voltage
5V
Input Voltage Tolerance
Up to 24V
Onboard Peripherals
12-bit DAC, CAN BUS, OP AMP
Wireless
Wi-Fi and Bluetooth (ESP32-S3)
Display
Integrated 12x8 red LED matrix
Interface
Qwiic connector
Special Feature
HID support
Programming Interface
Bootloader via USB
Power Source Options
USB
Know before you buy
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