HART PROTOCOL

I am working on a project that utilizes HART PROTOCOL for communication. My aim is to develop a Hart Transmitter + Receiver that works as a Master, sends data to the existing devices and read back the data. At present I am using DS8500 + AD5421 and PIC Microcontroller and we are facing issues which we couldn't figure out where the problem is. I want someone who has knowledge in developing and testing Hart Protocol who can have a look at our circuits, existing working circuits and guide us around to fix errors. More information about the issue we are facing will be shared when an interest is shown.