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.

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