ESP32 Hardware Serial2 Example
![ESP32 Hardware Serial2 Example](https://i0.wp.com/circuits4you.com/wp-content/uploads/2018/12/ESP32-Pinout.jpg?resize=604%2C373&ssl=1)
There are three hardware supported serial interfaces on the ESP32 known as UART0, UART1 and UART2. Like all peripherals, the pins for the UARTs can be logically mapped to any of the available pins on the ESP32. However, the UARTs can also have direct access which marginally improves performance.
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Demo 2: How to use multiple Serial ports on Arduino ESP32
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arduino - ESP32 Hardware Serial - only write 1 byte at a time - Stack Overflow
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Arduino: ESP32 Hardware Serial2 Example - iCircuit
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