i dont understand what you want to tell, we need to change something in the example for get it work?
when i'm connceting from my PC i get the "received: Hello world request" but it's supposed to connect one eich other no?
edit: i work whis 4 esp 01, and they just work in one way (from 1 to 3 and 2 to 4, they dont send from 3 to one or from 4 to 2) why there is no data movement between them?