WiFi doesn't function when it is on a PCB.
I have connected a ADS1115 to LoPy through I2C and I work with the WiFi of the lopy for modify some parameters from device. Everything works perfectly on a protoboard. The problem is generated when this works on a PCB, the WiFi doesn't work, but the data adquition with the ADC is good. There is any consideration in designing the PCB when do you work with 2,4GHz ?
@rustydusty Thanks, it's just what I need. Your contribution is very important.
In general you should avoid any copper around the antenna, define a keepout in your PCB design software or even better a board cutout
possibly, a previous conversation is related: search for "funny antenna effect" and/or "rustydusty"