ESP8266 ESP-12 ESP-12E UART Wifi Wireless Shield Fejlesztőkártya Arduino Mega R3 Modul Mega 3.3V 5V TTL Interface one
ESP8266 ESP-12 ESP-12E UART Wifi Wireless Shield Development Board For Arduino Mega  R3 Module Mega 3.3V 5V TTL Interface one
 
About D1
based on the ESP-8266EX.
Arduin Compatible, you can use it on Arduin IDE.
11 Digital I/O pins
1 Analog Input pin
OTA   -- Wireless Upload(Program)
On board switching power supply -- Max 24V input, 5V 1A output
 
 
 
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