152 lines
5.8 KiB
Markdown
152 lines
5.8 KiB
Markdown
# Console Example
|
|
|
|
(See the README.md file in the upper level 'examples' directory for more information about examples.)
|
|
|
|
This example illustrates the usage of the [Console Component](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/console.html#console) to create an interactive shell on the ESP32. The interactive shell running on the ESP32 can then be controlled/interacted with over a serial port (UART).
|
|
|
|
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).
|
|
|
|
## How to use example
|
|
|
|
### Hardware Required
|
|
|
|
This example should be able to run on any commonly available ESP32 development board.
|
|
|
|
### Configure the project
|
|
|
|
```
|
|
idf.py menuconfig
|
|
```
|
|
|
|
* Enable/disable `Example Configuration > Store command history in flash` as necessary
|
|
|
|
### 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. Note that GPIO15 is 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 <t>] [--io=<n>] [--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=<t> Wake up time, ms
|
|
--io=<n> If specified, wakeup using GPIO with given number
|
|
--io_level=<0|1> GPIO level to trigger wakeup
|
|
|
|
join [--timeout=<t>] <ssid> [<pass>]
|
|
Join WiFi AP as a station
|
|
--timeout=<t> Connection timeout, ms
|
|
<ssid> SSID of AP
|
|
<pass> 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>
|
|
```
|
|
|
|
## Example Breakdown
|
|
|
|
### Configuring UART
|
|
|
|
The ``initialize_console()`` function in the example configures some aspects of UART relevant to the operation of the console.
|
|
|
|
- **Line Endings**: The default line endings are configured to match those expected/generated by common serial monitor programs, such as `screen`, `minicom`, and the `idf_monitor.py` included in the SDK. The default behavior for these commands are:
|
|
- When 'enter' key is pressed on the keyboard, `CR` (0x13) code is sent to the serial device.
|
|
- To move the cursor to the beginning of the next line, serial device needs to send `CR LF` (0x13 0x10) sequence.
|
|
|
|
### Line editing
|
|
|
|
The main source file of the example illustrates how to use `linenoise` library, including line completion, hints, and history.
|
|
|
|
### Commands
|
|
|
|
Several commands are registered using `esp_console_cmd_register()` function. See the `register_wifi()` and `register_system()` functions in `cmd_wifi.c` and `cmd_system.c` files.
|
|
|
|
### Command handling
|
|
|
|
Main loop inside `app_main()` function illustrates how to use `linenoise` and `esp_console_run()` to implement read/eval loop.
|
|
|
|
### Argument parsing
|
|
|
|
Several commands implemented in `cmd_wifi.c` and `cmd_system.c` use the Argtable3 library to parse and check the arguments.
|
|
|
|
### Command history
|
|
|
|
Each time a new command line is obtained from `linenoise`, it is written into history and the history is saved into a file in flash memory. On reset, history is initialized from that file.
|