in reply to: Simplest possible HART Master posted by Peter Holmes on 07 March 2002 at 14:41:15.
Indeed the implementation is simply connecting a 20C15 alike to your uP's UART (with a few control lines). I suggest to make the hardware around it powerfull enough to drive more slaves simultaniously. I guess the 20C15 is most often used. Availability may be the key issue...
The HART protocol is pretty simple and straightforward (master-slave), the burst mode may need some reading.