I have a similar problem with one of my cameras which is somewhat far from the Wifi router. If I am not mistaken, iyou want to increase your wifi signal to reach your garage camera, you should look at a few solutions such as a signal repeater, a meshed router or even possibly an ethernet wire driven to your garage.
@Ka71 thanks for posting here in the community. Let's go ahead and see what we can do here. To confirm, how far is your Nest Camera from your WiFi router? Do you have other Nest devices in the house? What is the light status of your Nest Camera?
Give these steps a try:
Keep us posted.
I appreciate your suggestions, MplsCustomer and gilleslibre.
How's it going with your Nest Camera? We would appreciate it if you could share with us the information I’m asking above. Also, were you able to perform the steps I’m suggesting? We'd be glad to hear from you — We'd like to make sure everything is working.
Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.