I see there has been some Liebert work here recently. I have a Liebert UPS that has no USB, just RS-232. I reverse engineered the ESP-II protocol, at least as far as normal MultiLink monitoring goes, which was pretty simple. The protocol provides a table of parameter types and index ranges. So, I can read and (if I dare) write the parameter tables. We might be able to share info between serial/USB to help figure things out. The nice thing about serial is that I can hook up a null-modem loop, feed values to MultiLink, and see how it replies. Joe Krahn
Have you seen any similarities between the Liebert serial protocol and the Belkinunv serial protocol? I am asking because we discovered that their USB protocols are practically identical. Do you have any documentation on this ESP-II protocol that you have reverse engineered? Any code? The Belkinunv protocol (which I reverse engineered two years ago) is documented here: http://www.networkupstools.org/protocols/belkin-universal/ -- Peter Joe Krahn wrote:> > I see there has been some Liebert work here recently. I have a Liebert > UPS that has no USB, just RS-232. I reverse engineered the ESP-II > protocol, at least as far as normal MultiLink monitoring goes, which was > pretty simple. The protocol provides a table of parameter types and > index ranges. So, I can read and (if I dare) write the parameter tables. > > We might be able to share info between serial/USB to help figure things > out. The nice thing about serial is that I can hook up a null-modem > loop, feed values to MultiLink, and see how it replies. > > Joe Krahn > > _______________________________________________ > Nut-upsdev mailing list > Nut-upsdev@lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/nut-upsdev >