Get Arduino Uno R3 I2C Pins Gallery. What is inside an arduino? The 2 first pins side to usb connector are sda/scl according to documentation.

Mpu6050 Gy 521 With Arduino Uno R3 Stuck At Initializing I2c Devices from forum.arduino.cc

What is inside an arduino? To make it easier to make shields which use i2c the manufacturer added the sda/scl pins in a known location. So shall we see the specifications of this little board so that you can look note:sda and scl pins are not extra pins available in uno for i2c its an copy of pins a4 and a5.

To make it easier to make shields which use i2c the manufacturer added the sda/scl pins in a known location.

The arduino uno pinout guide includes information you need about the different pins of the arduino uno microcontroller and their uses: With i2c there are 2 wires referred to as scl and sda. To make it easier to make shields which use i2c the manufacturer added the sda/scl pins in a known location. The latest arduino uno r3 was released in 2011 and it is the third revision of uno boards.