One of our partner restaurants had issues with their WiFi and Internet. The WiFI connection on their POS and Online Ordering Tablets would intermittently drop out, resulting in a loss of orders.
The drop outs would happen randomly throughout the day and we could not repeat the connection issue when we tried. The tablets all had high connectivity strength to the router and pinging the router from the tablets showed no packet loss.
After a lot of trial and error we realised that the microwave oven in the kitchen was interfering with the WiFi signals when in use.
Microwave Ovens operate at the same frequency as the most common WiFi frequency band at 2.4 ghz.
To avoid WiFi issues from your microwave oven, ensure that your router and WiFI devices are located far from any microwave oven or get a newer dual band WiFi router that supports 5 ghz frequency band.