TPLINK-KL130智能燈泡connect到電話wifi connect唔到router wifi

是咁的,最近買咗隻TPLINK-KL130智能燈泡,download咗個app,發現一直connect唔到經router出嘅wifi。 而wifi我已經熄咗智慧型連線,將2.4GHz同5GHz分家分名分pw。但係都一直失敗。
後來我試過用電話hot spot share wifi畀ipad,再用ipad同隻燈connect,結果好快搞掂。
再後來我有諗是咪wifi channel問題,就由1-11逐個試,最終唔知channel4定5成功咗,但隔一日又自動gg。
請問有冇解決方法? 其實是咪router問題?謝謝。

See the spec and review if ok or not:
Router needs Wi-Fi Frequency        2.4GHz
Kasa App System Requirement        iOS 10 or Android 4.4 or higher
Wi-Fi Requirements        Secured home Wi-Fi connection required
WORKING STATUS
Tunable        Yes (via app and cloud only)

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什麼ROUTE?
如ASUS 可試下 擷取.JPG

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我router型號係:D-link AC1900 MU-MIMO Wi-Fi Router DIR-878
https://www.dlink.com/en/product ... u-mimo-wi-fi-router

用嚟connect嘅設備係 google pixel 3,ipad air2

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