reuse simulator for radio simulations. only cleanup after 5 seconds.
reuse simulator for radio simulations. only cleanup after 5 seconds.

Microsoft/pxt,switch-education/pxt,playi/pxt,switchinnovations/pxt,Microsoft/pxt,switchinnovations/pxt,Microsoft/pxt,switch-education/pxt,playi/pxt,switch-education/pxt,switch-education/pxt,playi/pxt,Microsoft/pxt,switch-education/pxt,playi/pxt,switchinnovations/pxt,Microsoft/pxt,switchinnovations/pxt