Arduino has announced a late May release for the UNO R4, the successor to the UNO R3 and what the company says is a “giant leap forward” for the popular series of microcontrollers.

The UNO R4 will retain the same form factor, shield compatibility, and 5V operating voltage as other members of the UNO family. Under the hood, however, things get interesting. There, a Renesas RA4M1 32-bit Cortex-M4 processor runs at 48MHz, enabling it to work three times as fast as the UNO R3.

“In addition to that,” an announcement reads, “SRAM went from 2kB to 32kB, and flash memory went from 32kB to 256kB to accommodate more complex projects.” In all, Arduino says, the UNO R4 will feature a three-to-16x increase in clock speed, memory, and flash storage.

Arduino hasn’t announced any specific details about the UNO R4’s price or release date, but has opened a waitlist (Source: Arduino)
The new board, which will be available in Wi-Fi and “cost-effective” Minima versions, arrives with a 12-bit analog DAC, plus other quality-of-life and performance updates, such as a USB-C port and a maximum power supply voltage increase to 24V. Additionally, a CAN bus and SPI port enable users “to minimize wiring and execute different tasks in parallel by connecting multiple shields.”

There’s no word on pricing yet, although Arduino promises more details closer to the UNO R4’s release. For now, however, you can check out the UNO R4’s product page, where you can join the device’s waitlist or sign up for its early access program, should you be an author or maintainer of an open-source library for Arduino.

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License: The text of "Arduino Takes a ‘Giant Leap Forward’ with UNO R4" by All3DP is licensed under a Creative Commons Attribution 4.0 International License.

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