I tried connecting two appliances: our fridge and our dishwasher. Both are about three meters away from an access point. I've struggled for hours to get these

I tried connecting two appliances: our fridge and our dishwasher. Both are about three meters away from an access point. I've struggled for hours to get these two appliances to connect to WiFi with the various mobile applications the manufacturers come up with. I gave up and just won't bother anymore.