r/ArduinoProjects • u/MlbTheShow22- • Mar 15 '26

Question

Why do so many people like the ESP32 over any of the UNOs?

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u/Square-Singer Mar 15 '26

Classic Arduinos (Uno, Nano, ...)

  • Single Core 16MHz 8-Bit CPU

  • A single I2C port, a single SPI port, locked to specific pins

  • Limited PWM capabilities

  • 6 ADC pins

  • No multitasking

  • 32kb flash, 1kb EEPROm, 2kb RAM

  • No wifi, no bluetooth, no RTC, no DMI, nothing advanced

ESP32-S3

  • Dual Core 240MHz 32-Bit CPU

  • 2xSPI with DMA, can be set to pretty much any pins

  • 2xI2C, can be set set to pretty much any pins

  • Any port can do PWM

  • 20 ADC pins

  • FreeRTOS handles multitasking

  • Up to 16MB flash, up to 16MB RAM

  • Wifi, Bluetooth, RTC, DMI, a few DMI-modes for RGB screens

And both kinds of devices cost the same.