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docs(uart): clarify example pins need a USB-to-UART bridge

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Mo Fei Fei
2026-09-10 14:50:43 +08:00
committed by morris
parent 2dc25a7bbe
commit bb2c545085
7 changed files with 21 additions and 2 deletions
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docs/en/api-reference/peripherals/uart.rst
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@@ -150,6 +150,9 @@ The same macro :c:macro:`UART_PIN_NO_CHANGE` should be specified for pins that w
// Set UART pins(TX: IO4, RX: IO5, RTS: IO18, CTS: IO19, DTR: UNUSED, DSR: UNUSED)
ESP_ERROR_CHECK(uart_set_pin({IDF_TARGET_UART_EXAMPLE_PORT}, 4, 5, 18, 19, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
.. note::
The pin numbers above are only an example. On many development boards, the onboard USB-to-UART bridge is connected to the UART0 default TX/RX pins. If you need to communicate with a PC over other ports or pins, connect a separate USB-to-UART bridge to those pins.
.. _uart-api-running-uart-communication: