Quote Originally Posted by Ioannis View Post
It seems you do not read, or not read carefully.

Your PIC has USART.

USART has Interrupt that has nothing to do with PORTB.0 INT interrupt.

Darrels Interrupts cover all possible Interrupt sources of a PIC. You just have to enable th appropriate interrupt.
I'm not english spoken, but USART is on RB.1 (RX), I can not use that PIN, just RB.6 for incoming data, and RB.6 as far as I know, can not be managed with interrupts.

It's a finished PCB and I'm trying to add some features, but can't change the hardware, otherwise this problem will be very easy to solve, still don't know hoy can DT-Interrupts can be applied here

Regards