Normally this problem occurs for one of the following reasons:
- Interrupted service from your internet provider. In this case you can't do anything except wait for your Internet Service Provider (ISP) to improve their service or change your ISP.
- Weak WiFi coverage (less than two WiFi bars measured by your smart phone, not by your PC). In this case the solution is to install the router closer to the meter or use a WiFi range extender (they are available for 25€ on Amazon).
- Interference with another WiFi network (the neighbour's one) that uses the same WiFi channel. To look at this you have to check the WiFi networks that are close to where your meter is installed. If there are other WiFi networks with a medium-to-strong signal working on the same channel that your home's WiFi, they can cause interferences and loss of data. To analyse the "WiFi environment" and choose a free channel or one that has less traffic you can use the smart phone app "WiFi manager" (or any similar app). The solution is to change the channel through which your router emits its signal to another one that has less traffic.