The Arduino Uno R4 is to have a Renesas RA4M1 32-bit Arm Cortex-M4 microcontroller, and there are “no plans to discontinue the popular Uno R3” , according to Arduino, which estimates that R4 will deliver a 3x performance boost over the 8bit ATmega328P equipped R3. Scheduled to appear in late May, Uno R4 will come …
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