Arm Cortex-M vs ESP32: Which is More Efficient

Arm’s Cortex-M microcontrollers are 32-bit RISC CPUs and are available at a range of performance levels with different features. The Raspberry Pi Pico use the Cortex-M0 in the RP2040, the BluePill has a M3, and the BlackPill uses a Cortex-M4. One rival to Arm’s MCUs is the ESP32 from Espressif Systems. The ESP32 uses a Tensilica Xtensa LX6 microprocessor at up to 240 MHz. The question is which MCU offers the best performance? Which one uses the least power? Which one is the most efficient? Let’s find out! Let Me Explain T-shirt: Twitter: Instagram: #garyexplains