Generally debugs messages in Arduino is done by Serial.print*, and show in this monitor serial, or another serial tool, as screen, pyserial, coolterm, etc. The Arduino official IDE, not have debugger.

USB to serial boards are necessary to program and debug boards, and/or access the serial console, and while they are very cheap, you may be in a situation where you don’t have any around, but you do ...

This library is very similar to the Arduino SoftSerial. It can be used to connect multiple GPIO's of the ESP8266 to UARTs. No: If you want to use a library for ...

There has been some buzz around ESP8266 Wi-Fi module, mostly because of its low price, and SDK availability, meaning it could become the Wi-Fi equivalent of ENC28J60 Ethernet module, and that for $5 ...