MayataWEMOS D1 Mini Pro 4MB/16MB External Antenna Connector NodeMCU Based esp8266 Series Antenna ESP-8266EX CP2104 Development Board (Development Board + Antenna 32MBIT=4MB)

This board does not come configured to use the external antenna included. You have to move a 0 ohm resistor to connect the antenna port on the board otherwise it uses the built in antenna. To make matters worse the SMA connector is the wrong polarity for wifi so if you plan on using any antenna other than the one it comes with it's not going to work.do not buy this if 1) you are unable to move the surface mount 0 ohm resistor to the correct port or 2) you plan to use any external antenna other than the one that came with it.

If you are going to use the external antenna instead of the onboard ceramic antenna, you need to remove the zero-ohm resistor next to the antenna connector, and solder bridge as shown by the red arrow. Otherwise, the external antenna isn't connected. Once done, everything works great.

As others mentioned, it’s necessary to do some soldering to get the external antenna working. Remove the 0K resistor by desoldering it or just clip it out. No need to reuse the smd part; a solder blob is all you need to bridge the pads.The external antenna improved a -89db signal to -78db. Not spectacular but enough gain to reliably move the small packets my application requires.

I was able to remove the 0 Ohm resistor and solder a connection to the external antenna, as others described. It wasn't an easy job, but I confirmed the connection was fine. Nonetheless, doing a WiFi scan with the external antenna showed that the reception was still worse than a standard D1 Mini.Maybe I did it wrong, but if that's the case I'm sure the same thing will happen to others. The point of getting a D1 Pro is to have an external antenna for better gain, which is why it should come set up for that antenna instead of requiring delicate soldering.

Works great, I was using an ESP8266 for my son's room, running ceiling LED strips WS2812b with WLED, but the router was a bit far from the ESP 8266 so connectivity was an issue, so I needed to use this ESP8266 with an antenna, and it worked fine no more connectivity issues, but you have to do a little of soldering, just look online how to do it, this part is fairly easy to do and enjoy a better connectivity.

Ordered two boards. They both accept code and the GPIO pins work fine. However, they are unable to use WiFi.As others pointed out, you must change the 0-ohm resistor to use external antenna. However, neither of my boards work with the on-board antenna.If your application doesn't need WiFi, then these WiFi boards are great.

I bought this because of the external antenna. By the time I got around to working with the device, I realized that it can not detect a wifi ap to connect to, nor can it broadcast an ssid of its own. it will flash just fine, and will show in a serial terminal that it is searching for the AP that is just across the room, it however never finds it and never connects. Of course it's past the "return window" by a week maybe. I cant really use it if the radio is broken in it.

Was not able to get this working connected to wifi using the internal antenna. Verified the code uploads fine. Tried moving the 0ohm to get the external antenna working but device still would not connect to wifi. I uploaded the same code to a NodeMCU and it works perfectly fine. Wanted this device because it has an external antenna.