(See the README.md file in the upper level 'examples' directory for more information about examples.)

This example demonstrates basic usage of I2C driver by reading and writing from a I2C connected sensor:

If you have a new I2C application to go (for example, read the temperature data from external sensor with I2C interface), try this as a basic template, then add your own code.

To run this example, you should have one ESP32, ESP32-S, ESP32-C or ESP32-H based development board as well as a MPU9250. MPU9250 is a inertial measurement unit, which contains a accelerometer, gyroscope as well as a magnetometer, for more information about it, you can read the datasheet of the MPU9250 sensor.

Note: The following pin assignments are used by default, you can change these in the menuconfig .

For the actual default value of I2C_MASTER_SDA and I2C_MASTER_SCL see Example Configuration in menuconfig.

Note: There's no need to add an external pull-up resistors for SDA/SCL pin, because the driver will enable the internal pull-up resistors.

Enter idf.py -p PORT flash monitor to build, flash and monitor the project.

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

I (328) i2c-simple-example: I2C initialized successfully
I (338) i2c-simple-example: WHO_AM_I = 71
I (338) i2c-simple-example: I2C de-initialized successfully

(For any technical queries, please open an issue on GitHub. We will get back to you as soon as possible.)