

Don't send 5 V signals to your ESP8266. The use of an ESP8266 with Arduino requires logic level translation of the UART signal, as provided by this easy 3.3 V - 5 V adapter.
It makes the ESP-01 ESP8266 WiFi module the easiest WiFi transceiver for your Arduino (5 V).
Don't send 5 V signals to your ESP8266. The use of an ESP8266 with Arduino requires logic level translation of the UART signal, as provided by this easy 3.3 V - 5 V adapter.
It makes the ESP-01 ESP8266 WiFi module the easiest WiFi transceiver for your Arduino (5 V).