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f835bead45
* Provide easy interface to esp_event in C++ * Extended functionality linke synchronous waiting for events * Closes IDF-1048 * Closes IDF-232
50 lines
1.1 KiB
Markdown
50 lines
1.1 KiB
Markdown
# Example: C++ I2C sensor read for MCP9808
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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This example demonstrates usage of C++ exceptions in ESP-IDF.
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In this example, the `sdkconfig.defaults` file sets the `CONFIG_COMPILER_CXX_EXCEPTIONS` option.
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This enables both compile time support (`-fexceptions` compiler flag) and run-time support for C++ exception handling.
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This is necessary for the C++ I2C API.
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## How to use example
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### Hardware Required
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An MCP9808 sensor and any commonly available ESP32 development board.
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Pullups aren't necessary as the default pullups are enabled in the I2CMaster class.
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### Configure the project
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```
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idf.py menuconfig
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```
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### Build and Flash
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```
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idf.py -p PORT flash monitor
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```
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(Replace PORT with the name of the serial port.)
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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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If the sensor is read correctly:
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```
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Current temperature: 24.875
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```
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If something went wrong:
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```
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I2C Exception with error: ESP_FAIL (-1)
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Coulnd't read sensor!
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```
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