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LAN Control is the setting that lets a computer on your own network talk to the lights directly, with no Govee cloud account and no API key in between. It ships switched off, and switching it on is the single most common fix when a desktop app cannot find your device.
Then that model does not expose the local API, and no desktop app can drive it over the network — this is a limitation of the device, not of any particular app. Check your model against the list of models known to support it. It is also worth updating the Govee Home app and the device firmware first; the toggle has been added to some models in later firmware.
Open GLanSync and run a scan. A device with LAN Control on answers within a second or two and appears with its model number. If nothing shows up, work through the list below in order — it is roughly the order of how often each one is the cause.
The most frequent cause by a wide margin. Your lights are on 2.4 GHz, and your computer may be on the 5 GHz band of the same router, on a mesh node that isolates clients, or on a guest network. Discovery works by broadcasting to the local network, and that broadcast does not cross those boundaries. Put both on the same network, or connect the computer by Ethernet to the same router.
Some routers block devices on the Wi-Fi from seeing each other, often labelled AP isolation, client isolation or guest mode. It is usually on by default for guest networks. Turn it off for your main network, or move the lights onto it.
On macOS, the app needs Local Network permission. If you dismissed that prompt, re-enable it in System Settings → Privacy & Security → Local Network. On Windows, Defender asks once for network access; if you clicked Cancel, allow it in Windows Security → Firewall & network protection → Allow an app through firewall.
Many VPN clients route or block local traffic. Disconnect the VPN and scan again. If the lights appear, add your local subnet to the VPN’s split-tunnel exclusions.
Confirm the light responds in the Govee Home app while your phone is on Wi-Fi with Bluetooth off. If it only works with Bluetooth on, it is not actually connected to your Wi-Fi and nothing on your network can reach it.
If broadcast discovery is blocked but the device is genuinely reachable, you can add it by IP address. Find the light’s address in your router’s connected-devices list, then use the manual-IP option in GLanSync. This bypasses discovery entirely and is a useful way to prove whether the problem is the network or the device.
No. It is a switch on the device, and once it is on, control happens entirely inside your home network. It is not the Govee Developer API — that is a separate cloud service with a key and rate limits, and GLanSync does not use it. Nothing about your screen, audio or network leaves your machine.
Download GLanSync — free during launch
Downloaded it and macOS says it is damaged? That is expected — here is the fix.