esp-idf/examples/peripherals/uart/uart_echo/main/Kconfig.projbuild

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menu "Echo Example Configuration"
config EXAMPLE_UART_PORT_NUM
int "UART port number"
range 0 2 if IDF_TARGET_ESP32
range 0 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3
default 2 if IDF_TARGET_ESP32
default 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3
help
UART communication port number for the example.
See UART documentation for available port numbers.
config EXAMPLE_UART_BAUD_RATE
int "UART communication speed"
range 1200 115200
default 115200
help
UART communication speed for Modbus example.
config EXAMPLE_UART_RXD
int "UART RXD pin number"
range 0 34 if IDF_TARGET_ESP32
range 0 46 if IDF_TARGET_ESP32S2
range 0 19 if IDF_TARGET_ESP32C3
default 5
help
GPIO number for UART RX pin. See UART documentation for more information
about available pin numbers for UART.
config EXAMPLE_UART_TXD
int "UART TXD pin number"
range 0 34 if IDF_TARGET_ESP32
range 0 46 if IDF_TARGET_ESP32S2
range 0 19 if IDF_TARGET_ESP32C3
default 4
help
GPIO number for UART TX pin. See UART documentation for more information
about available pin numbers for UART.
config EXAMPLE_TASK_STACK_SIZE
int "UART echo example task stack size"
range 1024 16384
default 2048
help
Defines stack size for UART echo example. Insufficient stack size can cause crash.
endmenu