In that example "Connecting two ESP8266 boards" the transmission i based on timer1 of server esp that that sends data to the only client, the device. In the case "Client Server with ESP8266" of an esp client and an esp server, the client sends data to the server and this responds to the only client with other data in the same connection. But n we have two clients: I can not understand how to address, for example, data from the server to the device and also to the client esp