USB to I2C communication Failure while using SCD

Question: What are the reasons for USB communication failure when using the SCD software for CyFi?

 

Answer:
  1.   Do not have the SCD software running when expansion cards are plugged into the PC Bridge interface connector. This will cause the SCD Software to stop polling the I2C interface eventually causing the RF Hub buffer to fill up and prevent packets from being received from the nodes.
  2.   Do not run the PSoC Programmer and SCD software at the same time.