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====== My Arduino isn't receiving data from Pixy ======


===== 0. Teach Pixy2 an object. =====
If you haven't already, go ahead and [[wiki:v2:teach_pixy_an_object_2|teach Pixy2 an object]]! Otherwise the Arduino will give an error like this: "Starting...error: no response"


===== 1. Check the Arduino cable. =====

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. .\\
{{wiki:img:ce5166e65a245cce097741efef288fe09b08da8a.jpg?400}}


===== 2. If you have a pan/tilt mechanism, unplug the servos, just in case. =====

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.


===== 3. Use the recommended setup (for now) =====

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.


===== 4. Run the "ccc_hello_world" example on your Arduino. =====

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.


===== 5. Make sure you're running the Arduino IDE version 1.0.5 or later. =====

Previous versions have issues with SPI communication.


===== 6. Make sure the "Data out port" in the Config Parameters dialog under "Interface" is set to "Arduino ICSP SPI". =====

See the picture below.\\
{{wiki:img:3504e33ebabfe17e9a77f3cc8aedcdbf511c6398.jpg?400}}


===== 7. Inspect the Arduino cable. =====

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.

{{wiki:img:3906926e918e39ebb99a516f782229ed46f95182.jpg?400}}\\
{{wiki:img:5c7d9dae86b5eda59aecd8a7888021fb125d3777.jpg?400}}
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