CapSense® Tuner: “invalid data received from the device” - KBA219198

Version: **

 

Question:

Why does the CapSense Tuner application in PSoC® Creator™ display a “invalid data received from the device” message?

 

Answer:

If you run the Tuner application, you may get the “invalid data received from the device” message as shown below.

 

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This error message is displayed if the Tuner application communication is getting interrupted. This may happen because of the following reasons:

 

  1. You put the device into deep sleep mode without handling the EZI2C Component correctly. You should ensure that EZI2C is not busy before the device enters deep sleep mode; otherwise the Tuner application receives unexpected data at wakeup and displays the "Incorrect data" warning as shown above.
  2. The Tuner application cannot work if a scan is not performed continuously. The Tuner application displays a communication error message if the scan is not done continuously. Therefore, the Tuner application needs to be located in an infinite loop unconditionally.