2017-09-27 16:03:22 -04:00
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# UART Events Example
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2018-11-01 06:57:24 -04:00
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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2017-09-27 16:03:22 -04:00
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2018-11-01 06:57:24 -04:00
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This example shows how to use the UART driver to handle special UART events. It also reads data from `UART0` directly,
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and echoes it back to the monitoring console.
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2017-09-27 16:03:22 -04:00
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2018-11-01 06:57:24 -04:00
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## How to use example
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2017-09-27 16:03:22 -04:00
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2018-11-01 06:57:24 -04:00
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### Hardware Required
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2021-06-07 22:47:49 -04:00
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The example can be used with any ESP32, ESP32-S and ESP32-C series based development board connected to a computer with a USB cable.
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2018-11-01 06:57:24 -04:00
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### Configure the project
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```
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2019-08-01 23:31:20 -04:00
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idf.py menuconfig
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2018-11-01 06:57:24 -04:00
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```
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### Build and Flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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2019-08-01 23:31:20 -04:00
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idf.py -p PORT flash monitor
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2018-11-01 06:57:24 -04:00
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```
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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Pushing `a` followed by a `b` on the keyboard will generate the following output:
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```
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...
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I (0) cpu_start: Starting scheduler on APP CPU.
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I (299) uart: queue free spaces: 20
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I (2249) uart_events: uart[0] event:
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I (2249) uart_events: [UART DATA]: 1
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I (2249) uart_events: [DATA EVT]:
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aI (12089) uart_events: uart[0] event:
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I (12089) uart_events: [UART DATA]: 1
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I (12089) uart_events: [DATA EVT]:
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b
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```
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