The temp sensor is available also in the PIC, but it gives the chip die temperature... usually we're interested on motor temperature and sticking the pic to the motor is not possible. An external connector to a temp sensor might be better. The critical part for PWM is generating exact 5Mhz bpsk signals and sometimes with the dividers/frequencies available in some chips this is not possible at all. Datasheet need to be deeply studied to check this possibility. Wifi and bluetooth are great but probably overkill for such use... I'm investigating VDD dac conversion and writing down a protocol to send this info to the decoder. When ready I'll update the firmware.