Your ESP8266 is an impressive, low cost WiFi module suitable for adding WiFi functionality to an existing microcontroller project via a UART serial connection. The module can even be reprogrammed to act as a standalone WiFi connected device--just add power!
Dc power 5.5 x 2.1 mm
5.5 x 2.1 mm
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2.1 x 5.5mm AC/DC Power Male Plug Jack Adapter
Plug diameter: 2.1mm center ID and 5.5mm OD
Plug length: 14mm and total length is 50mm
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