Using one of these 8-relay ESP8266 boards for outdoor lighting. For some unknown reason, it worked fine for months, and recently began losing wifi connections frequently. Decided to add an external rubber-duck antenna to the outside of the plastic box containing the board and wiring. On the attached ESP-12F board, the ground is on the outside left antenna trace, and the signal source is on the next/adjacent trace.
Signal on the stock board currently running is down in the weeds 
