Qunqi Smart Electronics ESP-12E WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible Based on ESP-8266EX Compatible IDE Support OTA wireless uploading maximum input voltage 24V 11 x I / O pins,1 x ADC pin based on the ESP-8266EX. Arduino Compatible, you can use it on Arduino 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 Support Arduino IDE 1x WeMos D1 WiFi Uno