Some users have encountered reliability issues when the UDRC™ is used with a Raspberry Pi 3.
NW Digital Radio has duplicated the problem and isolated its root cause.
Our team looked at different options and after consideration, we recommend the following simple change on the Raspberry Pi. The change can be applied to both the Raspberry Pi 2 and 3.
Edit /boot/config.txt adding the following to the file and saving the change:
This will take effect upon rebooting of the Raspberry Pi.
Additional details are available on the UDRC Wiki