If you've purchased an ESP board that lacks a connector for an external antenna and you're experiencing the limits of reception, there's a solution that doesn't involve the complex task of moving a tiny 0603 sized resistor to utilize the external antenna socket on some boards.
This workaround is relatively simple and the required parts are inexpensive, often found on platforms like eBay or AliExpress for just a few dollars.
- ESP/CYD of your choosing
- UFL to reverse polarity SMA lead with UFL connector removed and 5mm of shield and center exposed and tinned with solder
- Reverse polarity SMA 2.4GHz antenna
By following these steps, you can significantly improve the reach of your Cheap-Yellow-Display. For more infomation/examples, click here.