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