Heres another video about Arduino UNO with the ESP8266, this time in the ESP01 version. This model I consider to be smaller and cheaper and, therefore, less powerful. In this project, we connect our ESP01, without using an AT command, in the Arduino Uno. Both of these have their INO source codes. We set this as an alternative to make a serial link, meaning that we use the codes for the possibility of including WiFiManager, Watchdog, among other features. In short: we will use an ESP8266 for connections while an Arduino Uno answers the requests through the serial.”

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