However, the UARTs can also have direct access which marginally improves performance.
Like all peripherals, the pins for the UARTs can be logically mapped to any of the available pins on the ESP32. There are three hardware supported serial interfaces on the ESP32 known as UART0, UART1 and UART2. T here are three serial ports on the ESP32 known as U0UXD, U1UXD and U2UXD all work at 3.3V TTL Level.
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