Am I really using i2C well?

[SKRSKR]

The project to use with radxa zero will use another i2c device, but we connected Arduino to test i2c.

As you can see, in radxa zero, we also modified the /boot/uEnv.txt file to use gpio 14 and 15 as i2c. (Photo 1).

And if you look at the second attached picture, you can see how I connected with Arduino. (Photo 2)

However, if you check through the i2cdetect-y3 command, you can see that there is an unknown i2c device called 0x22, but I have never given this address.
And Arduino’s I2C address is not confirmed. (Photo 3)

I don’t know what device 0x22 is, and am I using I2C normally?

[SKRSKR]

I’ll let you know the connection status in case you can’t see it well in the picture.

Radxa Zero - Arduino

GPIO 14 - A5( SCL )
GPIO 15 - A4( SDA ) 
5V          -  5V
GND      -  GND

[SKRSKR]

And this is the Arduino code I wrote.

[SKRSKR]

It was my fault.

It was SDA-SDA, SCL-SCL connection.

It’s solved!