user-1: I have an Adafruit AS7262 visible spectral sensor. I want to receive the data of the sensor with an Arduino.
The sensor has two serial communication options: UART(asynchronous) or I2C(synchronous). I want to know which method is more suitable for the sensor to communicate with the Arduino microcontroller. I was thinking that UART is more suitable, because the sensor has his own master clock, in other words if I choose I2C then the Arduino needs to work as the "slave" and I dont think that is very suitable, because the Arduino has its own master clock also. For this reason I think that asynchronous method is more reliable, but I am not sure about this.

user78002: The I2C on this device is slave, not a master. Even though it has its own clock, it is designed to operate as a slave being read by a master.
You will have no issues using the I2C interface - in fact Adafruit uses it for their own software library.
Since there is already a I2C-based library available from the manufacturer I would use that, unless there is a good reason to use the UART instead.

-1: <p>I have an Adafruit AS7262 visible spectral sensor. I want to receive the data of the sensor with an Arduino.<br>
The sensor has two serial communication options: UART(asynchronous) or I2C(synchronous). I want to know which method is more suitable for the sensor to communicate with the Arduino microcontroller. I was thinking that UART is more suitable, because the sensor has his own master clock, in other words if I choose I2C then the Arduino needs to work as the "slave" and I dont think that is very suitable, because the Arduino has its own master clock also. For this reason I think that asynchronous method is more reliable, but I am not sure about this.</p>
 78002: <p>The I2C on this device is slave, not a master. Even though it has its own clock, it is designed to operate as a slave being read by a master.</p>

<p>You will have no issues using the I2C interface - in fact <a href="https://github.com/adafruit/Adafruit_AS726x" rel="nofollow noreferrer">Adafruit uses it for their own software library</a>.</p>

<p>Since there is already a I2C-based library available from the manufacturer I would use that, unless there is a good reason to use the UART instead.</p>
