Review on KeeYees ESP8266 ESP-12F NodeMcu Mini WLAN WiFi Development Board 4M Bytes for Arduino – Pack of 5 by Rosalio Zavala

Pinout vs Wemos d1 mini Differences between product received and listing: - Uses CH340C, not CH340G with crystal. - Another LDO voltage regulator (TX6211B) - No voltage polarity protection diode seems to be used. Loaded code for all 5 devices I received and every output pin worked, serial number worked and wifi worked. So everything works fine. The maximum supply voltage has been tested and it appears that an additional current of about 300mA can be applied to the 3.3V output. The voltage is 3.36V on the 3.3V rail. The TX6211B regulator datasheet lists a maximum of 400mA. So it seems to be correct. The product works well and the quality is good.