Phone as a baby monitor: connect two devices over Wi-Fi

With TinyWatch, an iPhone stays in the child's room in Camera Phone Mode while you open the video and audio on another screen. For that to work, both devices need a local connection through the same Wi-Fi network.

If the QR code scans but the live view doesn't open, the code usually isn't the problem. One device may be using a different network, a guest network may be isolating connected devices, or a VPN may be intercepting the local connection.

What “the same Wi-Fi” really means

The simplest setup is a home network you know and use every day. The room iPhone and the viewing device should both show the same active network. Check this in Wi-Fi settings on an iPhone or iPad, from the Wi-Fi menu on a Mac, or from the network controls in the Windows taskbar.

If you are using a phone or tablet as the viewing screen, temporarily turn off cellular data during the test. This makes it easier to confirm that the device is actually using Wi-Fi rather than a mobile connection.

A matching network name still doesn't guarantee that the devices can reach each other. A router, hotel, or workplace can deliberately separate devices connected to the same Wi-Fi.

Why the devices may not see each other

A guest network often provides normal internet access while blocking direct contact between connected devices. Websites still load, so the network appears to be working. TinyWatch needs a local path between the room iPhone and the second screen, so that isolation matters.

Hotel, office, school, café, and vacation-rental Wi-Fi can behave in the same way. A VPN, company security filter, firewall, or router isolation setting can also block the connection. Don't disable security controls at random. First test TinyWatch on a private network you control, such as your home Wi-Fi.

Troubleshoot in this order

Change one thing at a time so you know what fixed the problem.

1. Confirm that TinyWatch is still running in Camera Phone Mode on the room iPhone.
2. Check the active Wi-Fi name on both devices.
3. If the viewing screen is a phone or tablet, temporarily turn off cellular data.
4. Check camera, microphone, and local-network permissions on the room iPhone.
5. Pause the VPN for the test if your device or workplace policy allows it.
6. Create a new QR code or private viewing link and open it again.
7. On a computer, try a current version of Chrome if Safari doesn't open the view.
8. If the connection still fails, restart TinyWatch, the browser, and then the router.

What can you do away from home?

When you travel, the difficult part is often a network you don't control. At a relative's home, connecting both devices to private home Wi-Fi is usually straightforward. Hotel or vacation-rental Wi-Fi may isolate devices or require a separate sign-in page.

A personal hotspot may provide the shared Wi-Fi network TinyWatch needs, but don't treat it as guaranteed. The result depends on which device provides the hotspot, which iPhone acts as the room camera, the carrier, and operating-system behavior. If you want to connect the TinyWatch devices through a personal hotspot, test that exact arrangement before the trip. Apple describes current behavior and limitations in its Personal Hotspot guide.

What does the private link do?

Room video and audio travel locally between devices on the same Wi-Fi network. The private link opens the current viewing session, and the handoff page itself may use tinywatch.app.

For the technical details of that local connection, pairing, and encryption, read the TinyWatch security overview.

Treat the link as temporary access to the room. Don't post it or send it to anyone who shouldn't watch the live view. Create a new one if the link reaches the wrong person or place.

Once the live view works

Before leaving the iPhone in the room, check the picture, sound, and phone position. If you watch in a browser, keep the page open and visible. Don't assume motion or sound alerts will continue after you minimize the browser or put the computer to sleep.

A working connection is still only an extra way to check the room. Continue regular in-person checks, and make sure the child can't reach the room iPhone, mount, charger, or cord.