ESP8266 ESP-12E serieller WLAN Transceiver Adapter Modul V1.0 für Arduino UNO R3
3,18 €
Arduino series motherboards or compatible motherboards can be used directly. - WIFI @ 2.4 GHz, support WPA / WPA2 security mode. hope you could understand. - Wireless standard: 802.11 b / g / n.
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