Quick answer
Smart-home devices often disconnect because they depend on 2.4 GHz Wi-Fi, sit at the edge of coverage, or dislike newer security/band-steering behavior. Phones working nearby does not always prove the smart device has enough margin.
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Smart devices are different
Many smart-home devices use low-power 2.4 GHz radios. They can be pickier than phones and laptops, especially at doors, garages, exterior walls, and far corners.
Settings that can matter
Combined Wi-Fi names, band steering, WPA3-only security, and weak 2.4 GHz coverage can all affect older or cheaper smart-home gear.
- Doorbells and cameras often sit outside the strongest signal area.
- Bulbs and plugs may require 2.4 GHz during setup.
- Some devices work better with WPA2/WPA3 mixed mode than WPA3-only.
Fix the signal path first
Retest near the device location with a phone, then move the router or mesh node if needed. Avoid weakening Wi-Fi security just to force a device online.
What to check before you spend money
- Identify the device type.
- Check whether phones/laptops work nearby.
- Confirm whether the device requires 2.4 GHz.
- Note whether the router uses one combined Wi-Fi name.
- Check whether WPA3-only security is enabled.
What not to do yet
- Do not turn off Wi-Fi security.
- Do not assume a phone working nearby means the smart device has a strong enough signal.
- Do not move every smart device setting at once; change one thing and retest.
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