Nest Cam (battery) is offline or unavailable

When the Google Home app shows a Nest Cam (battery) as offline, there are two different situations, and owners on the Google Nest Community distinguish them. In the first the camera really has lost its Wi-Fi: it is out of range, the router has changed, or the battery has run flat. In the second the app shows offline while the camera still sends motion notifications, which is a status glitch, not a lost connection. Check the battery first, since a flat camera is offline by definition. Then the network: restart the router, move the camera closer or add a mesh node, and check the camera is on a band with a good signal.

Battery cameras sleep to save power and wake on motion, so a status of Idle is not offline. After a router or password change, run setup again. A factory reset is the last step. If the camera goes offline at the same time every day, look at what else happens then: a router restart, a neighbor's microwave, or a cleaning robot that runs near the router. A camera that goes offline only when it rains has a signal marginal enough that wet foliage tips it over the edge. A camera mounted outside a metal door or near a metal gutter has its Wi-Fi blocked by the metal, so a few centimetres of repositioning away from large metal surfaces often restores the connection.