Direction on how to build 1 Server & multi stations (6)

Hi! all.

I’m looking for a WIFI system with 1 server (ESP32 if possible) and 6 stations (ESP8266 if possible) that I can send “time” to all stations at every second. No need to receive from them, no connection to a local network and no connection to internet. I may use a WIFI router just for that if it’s really needed. Any hints on some programming info and best board for this will be appreciated. The station board must be very small. I read lots of info on how to read from multi stations, but none on write to them. Thanks all.