I was testing without people involved, so only machinery would have been damaged. I am very skeptical of any wireless safety systems. I know they exist and are

I was testing without people involved, so only machinery would have been damaged. I am very skeptical of any wireless safety systems. I know they exist and are used. It's the same reason I usually put in some kind of mechanical stop in the event of an errant bit-flip in a running program or piece of hardware. I put in steel flag that when struck turned 90 degrees locking the other piece of machinery, so it could not move until the other device returned. This was only as a redundancy to the software, and I slept better at night for it. Equipment ran for almost 10 years, 24 times a day, 355 days a year without incident.