By default, this example runs a self test which assumes the TX pin (GPIO18) and RX pin (GPIO19) are _connected together_.
To disable self-test mode, comment out RMT_RX_SELF_TEST in infrared_nec_main.c, after which, you need to connect a IR transmitter and a receiver to GPIO18 and GPIO19.
The TX pin and RX pin can be modified in top of the main/infrared_nec_main.c file.
```
#define RMT_TX_GPIO_NUM 18 /*!< GPIO number for transmitter signal */
#define RMT_RX_GPIO_NUM 19 /*!< GPIO number for receiver */
```
### 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
Run this example, you will see the following output log:
