Quick Answer
Put your phone on the same Wi-Fi network, open the the device maker's app, and run setup while standing near the router. If setup fails, the usual cause is a 2.4 GHz mismatch, weak signal at the device location, or a security mode the device does not support.
Before You Start
- Confirm the device is powered and in setup or pairing mode.
- Update the setup app and allow Bluetooth, local network, and location permissions.
- Use a simple WPA2/WPA3 Wi-Fi network name and password during setup.
- If your router supports band steering, keep the phone close to the router so setup does not fail at the edge of coverage.
Setup Steps
- Open the the device maker's app and choose add device.
- Select the device type and follow the prompt until the app asks for Wi-Fi.
- Choose the 2.4 GHz network if the app shows separate bands. Many smart devices cannot join 5 GHz.
- Wait for firmware updates before testing automations or voice control.
- Move the device to its final location and check signal strength there, not just beside the router.
If It Will Not Connect
Restart the device, restart the phone, and try setup again with VPN disabled. If the router uses WPA3-only mode, switch temporarily to WPA2/WPA3 transition mode. If the SSID is hidden, unhide it for setup. For mesh networks, try setup near the main router first, then move the device after it has joined.
Keep It Reliable
Reserve an IP address for important hubs, cameras, locks, and appliances. Keep IoT devices on a guest or IoT network when possible, but test whether the device still needs local access from your phone or hub. For cameras and doorbells, upload speed and Wi-Fi signal matter more than download speed.
Smart Lock Setup Notes
Smart locks use different wireless protocols depending on the model. August and Schlage Encode locks connect directly to Wi-Fi (2.4 GHz only). Yale Assure and most Schlage Connect locks use Z-Wave or Zigbee and require a compatible hub (SmartThings, Hubitat, Home Assistant with a Z-Wave/Zigbee stick). August Smart Lock Pro includes a Wi-Fi bridge that plugs into a power outlet separately — the lock itself communicates to the bridge over an August proprietary protocol, and the bridge provides the internet connection. Kwikset Halo connects directly via Wi-Fi; Kwikset SmartCode uses Z-Wave.
Smart locks are a higher-security category than most IoT devices. Place them on an IoT VLAN or guest network, but verify that your phone can still reach the lock locally if you use local unlocking features (e.g., August's auto-unlock via geofencing uses the cloud). For direct Wi-Fi locks, the lock is typically inside the door on the deadbolt — signal must penetrate the door itself and reach wherever the lock's antenna is positioned inside the metal housing. Test RSSI at the door before committing to a location. Battery-operated smart locks will disable Wi-Fi or Z-Wave radio at critically low battery levels to conserve power, which can cause unexpected offline events.
Frequently Asked Questions
Why will my smart lock not connect to Wi-Fi?
The most common causes: (1) Protocol mismatch — if your lock uses Z-Wave or Zigbee, it does not connect to Wi-Fi directly and requires a hub; check your lock model's spec sheet to confirm which protocol it uses. (2) Wi-Fi lock showing offline — the antenna is inside a metal door housing which attenuates signal significantly; test RSSI at the actual door location and consider adding a Wi-Fi access point near the entry if signal is below -70 dBm. (3) August Wi-Fi Bridge not set up — August Smart Lock Pro needs the separate Wi-Fi bridge connected and powered; the bridge must be within Bluetooth range of the lock (about 30 feet) and on the same 2.4 GHz network. (4) Low battery — most smart locks reduce or disable wireless radio when battery is low; replace or recharge before troubleshooting Wi-Fi. (5) WPA3-only security — use WPA2/WPA3 transition mode.
Should I put my smart lock on a guest or IoT network?
Yes — with a caveat. Placing the lock on an isolated IoT network protects your main network from a compromised lock, which is the right default for security. However, some smart lock features require local network access from your phone. August Auto-Unlock (Bluetooth) works at the door regardless of network. Remote access via the August/Yale/Schlage app uses the cloud and works fine from an isolated network with internet access. The main limitation is local LAN-based integrations: if you use Home Assistant, SmartThings, or Hubitat with a Wi-Fi lock and want local (non-cloud) control, your hub and lock must be able to communicate — which requires either the same network or firewall rules permitting specific traffic between VLANs.
My smart lock goes offline at night — what is causing it?
The most likely cause is battery drain — locks consume more power during Wi-Fi association and polling, and a battery that is marginal during the day may drop below the radio's minimum operating voltage overnight when temperature drops (alkaline batteries lose capacity in cold). Replace batteries and monitor. A secondary cause is router firmware scheduled maintenance or automatic channel changes — if the router reboots or changes channels nightly, the lock may fail to rejoin if its reconnection behavior is limited. Check router logs for nightly events. A third possibility on mesh networks: the lock may be roaming to a distant node with weak signal; check which node the lock is associated with and whether it varies.