Thanks Ray, we tried that but still no luck. Somewhere it was mentioned that the EM9191 may have other signals at different voltages as well? Could one of those be causing a problem?
And just to clarify, I don’t want to switch to the adapter you mentioned because we are integrating this into our own HW and figuring it out on this Bplus adapter is the first step (i.e. we will run into the same issues on our HW as we are having with this adapter).