| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 | | ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | -------- | # Basic Console Example (`esp_console_repl`) (See the README.md file in the upper level 'examples' directory for more information about examples.) This example illustrates the usage of the REPL (Read-Eval-Print Loop) APIs of the [Console Component](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/console.html#console) to create an interactive shell on the ESP chip. The interactive shell running on the ESP chip can then be controlled/interacted with over a serial interface. This example supports UART and USB interfaces. The interactive shell implemented in this example contains a wide variety of commands, and can act as a basis for applications that require a command-line interface (CLI). Compared to the [advanced console example](../advanced), this example requires less code to initialize and run the console. `esp_console_repl` API handles most of the details. If you'd like to customize the way console works (for example, process console commands in an existing task), please check the advanced console example. ## How to use example This example can be used on boards with UART and USB interfaces. The sections below explain how to set up the board and configure the example. ### Using with UART When UART interface is used, this example should run on any commonly available Espressif development board. UART interface is enabled by default (`CONFIG_ESP_CONSOLE_UART_DEFAULT` option in menuconfig). No extra configuration is required. ### Using with USB_SERIAL_JTAG *NOTE: We recommend to disable the secondary console output on chips with USB_SERIAL_JTAG since the secondary serial is output-only and would not be very useful when using a console application. This is why the secondary console output is deactivated per default (CONFIG_ESP_CONSOLE_SECONDARY_NONE=y)* On chips with USB_SERIAL_JTAG peripheral, console example can be used over the USB serial port. * First, connect the USB cable to the USB_SERIAL_JTAG interface. * Second, run `idf.py menuconfig` and enable `CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG` option. For more details about connecting and configuring USB_SERIAL_JTAG (including pin numbers), see the IDF Programming Guide: * [ESP32-C3 USB_SERIAL_JTAG](https://docs.espressif.com/projects/esp-idf/en/stable/esp32c3/api-guides/usb-serial-jtag-console.html) * [ESP32-S3 USB_SERIAL_JTAG](https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/usb-serial-jtag-console.html) ### Using with USB CDC (USB_OTG peripheral) USB_OTG peripheral can also provide a USB serial port which works with this example. * First, connect the USB cable to the USB_OTG peripheral interface. * Second, run `idf.py menuconfig` and enable `CONFIG_ESP_CONSOLE_USB_CDC` option. For more details about connecting and configuring USB_OTG (including pin numbers), see the IDF Programming Guide: * [ESP32-S2 USB_OTG](https://docs.espressif.com/projects/esp-idf/en/stable/esp32s2/api-guides/usb-otg-console.html) * [ESP32-S3 USB_OTG](https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/usb-otg-console.html) ### Other configuration options This example has an option to store the command history in Flash. This option is enabled by default. To disable this, run `idf.py menuconfig` and disable `CONFIG_CONSOLE_STORE_HISTORY` option. ### Build and Flash Build the project and flash it to the board, then run monitor tool to view serial output: ``` idf.py -p PORT flash monitor ``` (Replace PORT with the name of the serial port to use.) (To exit the serial monitor, type ``Ctrl-]``.) See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects. ## Example Output Enter the `help` command get a full list of all available commands. The following is a sample session of the Console Example where a variety of commands provided by the Console Example are used. On ESP32, GPIO15 may be connected to GND to remove the boot log output. ``` This is an example of ESP-IDF console component. Type 'help' to get the list of commands. Use UP/DOWN arrows to navigate through command history. Press TAB when typing command name to auto-complete. [esp32]> help help Print the list of registered commands free Get the total size of heap memory available restart Restart the program deep_sleep [-t ] [--io=] [--io_level=<0|1>] Enter deep sleep mode. Two wakeup modes are supported: timer and GPIO. If no wakeup option is specified, will sleep indefinitely. -t, --time= Wake up time, ms --io= If specified, wakeup using GPIO with given number --io_level=<0|1> GPIO level to trigger wakeup join [--timeout=] [] Join WiFi AP as a station --timeout= Connection timeout, ms SSID of AP PSK of AP [esp32]> free 257200 [esp32]> deep_sleep -t 1000 I (146929) deep_sleep: Enabling timer wakeup, timeout=1000000us I (619) heap_init: Initializing. RAM available for dynamic allocation: I (620) heap_init: At 3FFAE2A0 len 00001D60 (7 KiB): DRAM I (626) heap_init: At 3FFB7EA0 len 00028160 (160 KiB): DRAM I (645) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM I (664) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (684) heap_init: At 40093EA8 len 0000C158 (48 KiB): IRAM This is an example of ESP-IDF console component. Type 'help' to get the list of commands. Use UP/DOWN arrows to navigate through command history. Press TAB when typing command name to auto-complete. [esp32]> join --timeout 10000 test_ap test_password I (182639) connect: Connecting to 'test_ap' I (184619) connect: Connected [esp32]> free 212328 [esp32]> restart I (205639) restart: Restarting I (616) heap_init: Initializing. RAM available for dynamic allocation: I (617) heap_init: At 3FFAE2A0 len 00001D60 (7 KiB): DRAM I (623) heap_init: At 3FFB7EA0 len 00028160 (160 KiB): DRAM I (642) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM I (661) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (681) heap_init: At 40093EA8 len 0000C158 (48 KiB): IRAM This is an example of ESP-IDF console component. Type 'help' to get the list of commands. Use UP/DOWN arrows to navigate through command history. Press TAB when typing command name to auto-complete. [esp32]> ``` ## Troubleshooting ### Line Endings The line endings in the Console Example are configured to match particular serial monitors. Therefore, if the following log output appears, consider using a different serial monitor (e.g. Putty for Windows) or modify the example's [UART configuration](#Configuring-UART-and-VFS). ``` This is an example of ESP-IDF console component. Type 'help' to get the list of commands. Use UP/DOWN arrows to navigate through command history. Press TAB when typing command name to auto-complete. Your terminal application does not support escape sequences. Line editing and history features are disabled. On Windows, try using Putty instead. esp32> ```