Re: USART Overrun Error with PIC32mz
Why are you asking about USART in Ethernet forum?
Then there is no Synchronous USART in any PIC32MX or MZ device.
Does the harmony code you have, function at lower bitrates, lower than 100 kbit/s ?
Is there any Flow control enabled?
Do you have access to Oscilloscope or Logic analyzer, to capture UART signaling and Interrupt handler performance?