Is it possible to make a wireless public address system for a group of people using the ESP8266?

Question

Microcontrollers

Good afternoon.
It is necessary to make a warning system, roughly speaking, for camp counselors :).
To press a button on a certain remote control, and 20 people simultaneously vibrated, beeped and blinked a certain compact device, such as a bracelet.
The radius of destruction is 200 meters maximum, the batteries of the devices should be enough for at least a week.
Is it possible to implement such devices based on the ESP8266 module?
For example, for one module, set the SSID "PANIC" and use it as a signal, and when an "Alarm" occurs, simply turn it on. The remaining modules, seeing this SSID on the air, execute the script: blink the LED, beep the buzzer and turn the vibration motor for 5 seconds, for example.
Maybe there are some simpler solutions to the problem?
PS The project is completely non-commercial, I will do it at my own expense to better ensure order in the camp on the road.
Thank you!

Answer 1

What's wrong with a regular cell phone? It also beeps and vibrates when a message is received. And every counselor already has one, and with a probability of 99.9% they do not part with him even in the toilet.

Answer 2

Well, I don’t know about 200 meters, but if you try to program Esp8266-12 through an already standard solution with arduino, then there is a library for working with Telegram bots. through them and configure everything you need.