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Aqara Smart Lock U400 – Progress Update | V3.1.0.7 （Jan 28)
Hi friends,
First of all, thank you sincerely for choosing Aqara Smart Lock U400 and for the positive feedback we’ve seen since launch. As the product manager of U400, I want to personally say how much we appreciate you…
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130
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3541
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February 22, 2026
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Guide: Setting Up Your Aqara Smart Lock U400
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25
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1969
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February 23, 2026
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Extra battery for U400
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20
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483
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February 22, 2026
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How does Safety Re-Lock Work? U400
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8
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77
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February 20, 2026
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Living With Smart Lock U400? We Want Your Story
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64
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3603
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February 19, 2026
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U400 - Troubleshooting Calibration Issue
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1
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28
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February 19, 2026
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No notifications from U400 lock when door is locked or unlocked
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3
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30
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February 19, 2026
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Can U400 be permanently plugged to a USB-C power?
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6
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68
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February 18, 2026
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Smart Lock U400 Launch – Forum Exclusive Limited Codes!
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382
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5375
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February 17, 2026
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U400 keeps failing to communicate with hub and BT
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1
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33
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February 17, 2026
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U400 Review - 2 Weeks with the New Lock
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4
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98
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February 16, 2026
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Should the U400 in Aqara app via a M100 have configuration like via bluetooth?
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2
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15
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February 15, 2026
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U400 Auto Lock Chime Notification
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5
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82
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February 15, 2026
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U400 + Apple Home Matter setup fails: Aqara app says “No Matter controller in the current home” after entering Apple Home code
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13
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408
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February 15, 2026
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My favorite smart device
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2
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27
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February 15, 2026
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Experience using U400
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1
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22
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February 13, 2026
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My (mostly positive) experience with the U400
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1
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40
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February 13, 2026
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Few questions before buying the U400 SmartLock
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6
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60
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February 11, 2026
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Living in the Netherlands and using Aqara U400
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13
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252
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February 10, 2026
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U400 Automations
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1
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94
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February 10, 2026
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My Matter over Thread Smart Home Stack - How It All Works Together
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6
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88
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February 10, 2026
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U400 Lock + Mini Switch - Creating a "Door Buzzer" Button
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3
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43
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February 10, 2026
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My experience with the U400 and my grandma loving it!
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1
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18
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February 9, 2026
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U400 - Homey Uses - Ask me any ill test it
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1
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19
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February 9, 2026
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SmartLockU400 Owner Review
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1
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25
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February 9, 2026
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Aquara U400 not binding to M100
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7
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115
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February 3, 2026
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U400 works well but one door can’t tell if it is open
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7
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31
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February 9, 2026
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U400 UWB Unlock on Approach Not Working At All
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3
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112
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February 8, 2026
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Aqara Smart Lock U400 on Android/Home Assistant (Montreal Winter Experience)
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4
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68
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February 9, 2026
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CES 2026 Is Here — Discover What Aqara Has to Offer!
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39
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4312
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February 7, 2026
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