Separate the internet line from room coverage
Use the same device to compare a test near the router with one in the problem room. A poor result everywhere calls for line and router checks; a room-specific drop suggests the local connection needs attention.
Map walls and routes
Mark thick walls, stairs, terraces and outbuildings on a simple plan. Record where calls or streaming fail. Test prospective equipment positions before assuming a package's advertised floor area fits the property.
Give each node a usable connection
A wireless mesh node needs a working link back to the network, so placing it inside a dead zone can disappoint. Where supported and practical, Ethernet backhaul avoids relying on that particular wireless path.
Plan outdoor coverage separately
Check outdoor ratings, power and cable routes before mounting equipment outside. Compare a surveyed equipment plan with further trial purchases; neither a particular brand nor an extra node guarantees whole-property coverage.
An example test plan
For a terrace call that drops, compare the same call near the router, at the terrace door and outside. Mark where it changes. That gives a candidate access-point location to test instead of buying by a coverage-area claim.
Questions about this guide
Where should I test WiFi in a stone finca?
Use the same device near the router, beyond each thick wall and in the rooms or terrace you use most. Note the location and result so the weak link is visible before equipment is selected.
Can mesh units use an Ethernet connection through the house?
Some systems support Ethernet backhaul. Check the specific models and cable route first; an available socket alone does not establish that the equipment supports the planned connection.