menu "Modbus Example Configuration" config MB_UART_PORT_NUM int "UART port number" range 0 2 if IDF_TARGET_ESP32 default 2 if IDF_TARGET_ESP32 range 0 1 if IDF_TARGET_ESP32S2 default 1 if IDF_TARGET_ESP32S2 help UART communication port number for Modbus example. config MB_UART_BAUD_RATE int "UART communication speed" range 1200 115200 default 115200 help UART communication speed for Modbus example. config MB_UART_RXD int "UART RXD pin number" range 0 34 if IDF_TARGET_ESP32 default 22 if IDF_TARGET_ESP32 range 0 46 if IDF_TARGET_ESP32S2 default 19 if IDF_TARGET_ESP32S2 help GPIO number for UART RX pin. See UART documentation for more information about available pin numbers for UART. config MB_UART_TXD int "UART TXD pin number" range 0 34 if IDF_TARGET_ESP32 default 23 if IDF_TARGET_ESP32 range 0 46 if IDF_TARGET_ESP32S2 default 20 if IDF_TARGET_ESP32S2 help GPIO number for UART TX pin. See UART documentation for more information about available pin numbers for UART. config MB_UART_RTS int "UART RTS pin number" range 0 34 if IDF_TARGET_ESP32 range 0 46 if IDF_TARGET_ESP32S2 default 18 help GPIO number for UART RTS pin. This pin is connected to ~RE/DE pin of RS485 transceiver to switch direction. See UART documentation for more information about available pin numbers for UART. choice MB_COMM_MODE prompt "Modbus communication mode" default MB_COMM_MODE_RTU if CONFIG_FMB_COMM_MODE_RTU_EN help Selection of Modbus communication mode option for Modbus. config MB_COMM_MODE_RTU bool "RTU mode" depends on FMB_COMM_MODE_RTU_EN config MB_COMM_MODE_ASCII bool "ASCII mode" depends on FMB_COMM_MODE_ASCII_EN endchoice endmenu