My suggestion for improving the SONOFF Zigbee Wireless Switch, SNZB-01P, and creating a new version of this portable wireless button, even more appealing for its use as an emergency button, is as follows:
If possible, consider incorporating an accelerometer chip into the SNZB-01P, similar to those used on bicycles for the rear brake light. This would allow for automatic detection of a fall by the user. This would be a significant advancement for the care of the elderly people.
Thank you for your attention
Adolf Rupérez