I didn't write the question very well. I've been on RWGPS for several years, used as my bike computer on my iPhone. I'm buying a Wahoo Roam currently for this year to see how that stacks up against the iPhone, and this discussion of feeding data from the Civante to these things caught my eye. That's the part I haven't waded into yet.
However, looking at your answer, I wandered into the other side of the basement where my Civante is sadly waiting out the winter, turned it on, and played with the Sensors setting I found in RWGPS, and lo and behold, I see that I can get the cadence from the bike onto my computer screen, so that's great. I need to learn some more about getting power numbers onto the Wahoo and what is involved with that.
I've been happy with the iPhone's implementation of RWGPS, especially the mapping, the smoothness of the map rendering and the excellent voice nav cues. It seems like some of that will go away with a Roam or Karoo, but on the other hand I will gain gradient as a metric, which I cannot get on the phone, and that is a biggie for me. Much better battery life and the phone can just go in the handlebar bag where it belongs.
Always fun playing with the technical stuff! Thanks for the response. I cannot wait to get that bike back in business again fairly soon now.