## Knob Power Save Example This example demonstrates how to utilize the `knob` component in conjunction with the light sleep low-power mode. * `knob` [Component Introduction](https://docs.espressif.com/projects/esp-iot-solution/en/latest/input_device/knob.html) ## Hardware Any GPIO on any development board can be used in this example, for the default GPIO, please refer to the table below. | Hardware | GPIO | | :-----------------: | :---: | | Encoder A (Phase A) | GPIO1 | | Encoder B (Phase B) | GPIO2 | ## Build and Flash Build the project and flash it to the board, then run the monitor tool to view the serial output: * Run `. ./export.sh` to set IDF environment * Run `idf.py set-target esp32xx` to set target chip * Run `idf.py -p PORT flash monitor` to build, flash and monitor the project (To exit the serial monitor, type `Ctrl-]`.) See the Getting Started Guide for all the steps to configure and use the ESP-IDF to build projects. ## Example Output ``` I (316) pm: Frequency switching config: CPU_MAX: 80, APB_MAX: 80, APB_MIN: 10, Light sleep: ENABLED I (322) sleep: Code start at 0x42000020, total 106515, data start at 0x3c020020, total 46384 Bytes I (331) gpio: GPIO[1]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0 I (341) gpio: GPIO[2]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0 I (350) Knob: Iot Knob Config Succeed, encoder A:1, encoder B:2, direction:0, Version: 0.1.4 I (359) main_task: Returned from app_main() I (1503) knob_power_save: knob event KNOB_LEFT, -1 I (1503) knob_power_save: Wake up from light sleep, reason 7 I (1691) knob_power_save: knob event KNOB_LEFT, -2 I (1691) knob_power_save: Wake up from light sleep, reason 7 I (1860) knob_power_save: knob event KNOB_LEFT, -3 I (1860) knob_power_save: Wake up from light sleep, reason 7 I (1940) knob_power_save: knob event KNOB_LEFT, -4 I (1940) knob_power_save: Wake up from light sleep, reason 7 I (2017) knob_power_save: knob event KNOB_LEFT, -5 I (2017) knob_power_save: Wake up from light sleep, reason 7 ```
To create a project from this example, run:
idf.py create-project-from-example "espressif/knob^0.1.5:knob_power_save"