Now you will be able to see data coming from Arduino. Hi, One serial port (serial) is used to communicate with the user (over usb) and the other serial port (serial1) is used to communicate with the ESP8266.
You can use this library to set up a the telnet server to communicate status messages or debug / error log output.
If you are watching the Serial Terminal, you’ll see dots appear until you ESP-07S ESP8266 Serial to Wifi Module NodeMCU Motor Drive L293D Shield, WifiCar.
With this simple example we have demonstrated how to set up a client program, connect it to a server, request a web page and retrieve it. Commands can be sent through serial communication. However, a word of caution - it is highly undocumented (primary reason for writing this document), and more importantly, it is frequently updated and not backward compatible. The idea is to be able to telnet into the TCP port and communicate with the Arduino.