I tested this CH340G USB to serial with Arduino IDE and ESP8266 (3V3,RX,TX,GND) and it works very well. CP2102 from other seller requires external power 3V3 for ESP8266, but this CH340G USB to serial does not require external power when I upload new sketch to ESP8266.
I received this item but it’s very rusty and the packet was wet from inside , as you can see I pictures below. Please send me again or refund me. Thanks