Make sure the Arduino cable is plugged into the ICSP connector on your Arduino correctly. It's possible to plug in the cable backwards and/or shifted over forward/backward or left/right. Make sure the cable is plugged in as shown in the picture below. .

The servos don't affect Arduino communications, but a defective servo might. Unplug the servos from your Pixy just to make sure they are not causing problems.

The recommend setup is:

• Pixy plugged into USB
• Arduino plugged into USB
• Both USB cables plugged into your computer
• Arduino and Pixy connected by the supplied Arduino cable

With this configuration both your Pixy and Arduino are being powered over USB and no other power sources are being used. There are lots of ways to power Arduino and Pixy, but use this setup until your Arduino and Pixy are communicating nicely together.

Use Arduino code that is known to work. The ccc_hello_world example is a good, simple program for testing communications between Pixy and Arduino.

Previous versions have issues with SPI communication.

See the picture below.

We test all Arduino cables, but it may be worthwhile to inspect it and make sure the it's correct or not damaged. Compare your cable to the pictures below.