![]() doc(rmt): update README.md file of rmt related example. See merge request idf/esp-idf!2636 |
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README.md
RMT Transmit Example
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This example will shows how to configure and operate the remote control (RMT) peripheral to transmit a sample message in the Morse code, it also shows how to transmit custom format of data.
How to Use Example
Hardware Required
- A development board with ESP32 SoC (e.g., ESP32-DevKitC, ESP-WORVER-KIT, etc.)
- A USB cable for Power supply and programming
- A LED, a speaker or an earphone
Connection :
330R LED
GPIO18 +----/\/\/\----+------|>|-----+ GND
|
| /|
+-+ | Speaker
| | | or
+-+ | earphone
| \|
|
+--------------+ GND
Configure the Project
make 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:
make -j4 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
To be able to see and hear the message output by the RMT, connect a LED and a speaker or an earphone (be careful - it may be loud) to the GPIO18(the pin can be changed by modify the definition of RMT_TX_GPIO
in main/rmt_tx_main.c
).
Run this example, you will see the following output log:
RMT Tx: Transmission complete
RMT Tx: Sample transmission complete
Troubleshooting
-
Programming fail
- Hardware connection is not correct: run
make monitor
, and reboot your board to see if there is 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.