OVMS3-idf/examples/peripherals/uart_async_rxtxtasks/README.md

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UART asynchronous example, that uses separate RX and TX tasks
=============================================================
Starts two FreeRTOS tasks:
- One task for transmitting 'Hello world' via the UART.
- One task for receiving from the UART.
If you'd like to see your ESP32 receive something, simply short
TXD_PIN and RXD_PIN. By doing this data transmitted on TXD_PIN will
be received on RXD_PIN. See the definitions of TXD_PIN and RXD_PIN
in ./main/uart_async_rxtxtasks_main.c.
The output for such configuration will look as follows:
```
I (3261) TX_TASK: Wrote 11 bytes
I (4261) RX_TASK: Read 11 bytes: 'Hello world'
I (4261) RX_TASK: 0x3ffb821c 48 65 6c 6c 6f 20 77 6f 72 6c 64 |Hello world|
...
```
The third line above prints received data in hex format, that comes handy to display non printable data bytes.