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README.md
LEDC Example
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This example shows how to control intensity of LEDs using ESP32's on-board hardware LED PWM Controller module.
How to use example
Hardware Required
- A development board with ESP32 SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
- A USB cable for power supply and programming
Connect four LEDs to the following LEDC channels / individual GPIOs:
ledc channel | GPIO |
---|---|
channel 0 | GPIO18 |
channel 1 | GPIO19 |
channel 2 | GPIO4 |
channel 3 | GPIO5 |
Configure the project
idf.py menuconfig
- Set serial port under Serial Flasher Options.
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
(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
Running this example, you will see each ledc's brightness changes differently
- LEDC 1: Fade up / increase intensity
- LEDC 2: Fade down / decrease intensity
- LEDC 3: Keep a stable intensity
- LEDC 4: LED is not on
you can also see the following output log on the serial monitor:
1. LEDC fade up to duty = 4000
2. LEDC fade down to duty = 0
3. LEDC set duty = 4000 without fade
4. LEDC set duty = 0 without fade
...
Troubleshooting
-
Programming fail
- Hardware connection is not correct: run
idf.py -p PORT monitor
, and reboot your board to see if there are any output logs. - The baud rate for downloading is too high: lower your baud rate in the
menuconfig
menu, and try again.
- Hardware connection is not correct: run
For any technical queries, please open an [issue] (https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.