i2cdev one dev per I2C port or one dev per I2C device

[mbastida123]

Hi,

We are using the I2Cdev library to connect to two devices on the same I2C bus.

The question is, each I2C has to have a i2c_dev_t struct or both devices have to share the same i2c_dev_t.

Inspecting how the library is built I would say it's the first one. But then I get to the conclusión that esp-idf's I2C library is not thread-safe when accessing the same device from diferent threads. That's why in i2cdev the mutex is not shared accross diferent I2C devices.

Am I right?

[UncleRus]

Each I2C device must have its own descriptor.

[mbastida123]

Hi @UncleRus,

Thanks for the quick response!