Supported Targets | ESP32 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
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(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
.
SDA | SCL | |
---|---|---|
ESP I2C Master | I2C_MASTER_SDA | I2C_MASTER_SCL |
MPU9250 Sensor | SDA | SCL |
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.)