In the DataField compute(info) function I get info.startTime, info.timerTime and info.elapsedTime. Times for timerTime and elapsedTime track and startTime never changes. How can I start/stop the elapsed time when pressing the Enter button?
You can simulate timer and other FIT data by picking the 'Simulate' or 'Run From File' options under the 'FIT Data' menu. The Connect IQ simulator does not simulate the whole product, so you can't start and stop the timer in the way you would on a product.
Additionally, info.timerTime is the time that the watch has been running (excluding auto-pause and stop/start), and info.elapsedTime is the time since the activity recording started (including auto-pause and stop/start). The documentation on this isn't great, but Brian's post here provided a summary.