I'm on the latest version of Android Garmin Connect (updated in the Google Play store right before typing this).
My Rally 100 pedal, ID: 498202, Model #3578, Serial #3375864346 is on SW Version 4.0.
However,
The Garmin Connect app keeps telling me there is a new firmware available. It will transfer the firmware (fast red/green LED status indicator) to the pedal, the pedal will install the firmware (slow red/green LED status indicator) and then the pedal will reboot. I did this at least 5 times before realizing that I was only reinstalling 4.00 over and over.
Surely this can't be the intended behavior?