Arduino WiFi R3 ATmega 2560 + ESP8266

Specifications: Microcontroller: ATmega2560 IC Wi-Fi: ESP8266 USB-TTL converter: CH340G Power Out: 5V-800mA Power IN. USB: 5V (500mA max.) Power IN. VIN/DC Jack: 9-24V Power Consumption: 5V 800mA Logic Level: 5V Wifi: Wi-Fi 802.11 b/g/n 2.4 GHz USB: Micro USB Clock Frequency: 16MHz Operating Supply Voltage: 5V Digital I/O: 54 Analog I/O: 16 Memory Size: 256kb Data RAM Type/Size: 8Kb Data ROM Type/Size: 4Kb Interface Type: serial\OTA Operating temperature: −40С°/+125С° Length×Width: 53.361×101.86mm Antenna: Buil-in\external antenna