5Pcs Geekcreit® D1 R2 V2.1.0 WiFi Uno Module Based ESP8266 Module For Arduino Nodemcu Compatible

Description: Based on the ESP-8266EX. Arduino Compatible, you can use it on Arduino IDE. NodeMcu Compatible 11 Digital I/O pins 1 Analog Input pin OTA -- Wireless Upload(Program) On board switching power supply -- Max 24V input, 5V 1A output What's new about V2.1.0 Use BRT (Bias Resistor Transistor) easier into flash mode. Optimize the circuit, the system is more stable. Infos: Click here. Package included: 5 x D1 R2 V2.1.0 WiFi Uno Based ESP8266 For Arduino Nodemcu Compatible