Originally Posted by
carleton
Hmmmm....that's interesting. You should get cadence data even if you are "floating" over the pedals and not applying any pressure to them. It sounds like they are using an algorithm that senses pressure on the cranks an transmit that every revolution (just like SRM), but with SRM, it takes a long time of it not feeling any pressure at all for it to assume that you are off the bike. So, it's still broadcasting cadence.
I'm curious. Did you have to install any sort of magnet/switch/thingy near the BB that interacts with the cranks? Lack thereof is a clue to how they are making it work.
Power2Max in accelerometer based cadence so no magnets. SRM needs to keep sending the last signal since it only knows about cadence when the switch passes the magnet so 30rpm with a single switch is 2 seconds to determine if it is slow or stopped. I think SRM is 3 seconds without a cadence trip for it to go to 0. On a road bike going hard then coasting suddenly has a tail of the last reading.
The accelerometer should be able to detect 0 power cadence within the 1 second ANT+ broadcast.