Yeelight Wifi Devices Series:Became unavailable Yeelight Ceil26 0x1c5c4959 by Yeelight Integration

Configuration Frontend
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Became unavailable Yeelight Ceil26 0x1c5c4959 by Yeelight Integration

I am using a Xiaomi Yeelight YLDP06YL E27 bulb integrated this way: Yeelight - Home Assistant

Connect the bulbs to China server in the Yeelight App

update firmware to lateset within the yeelight app
bulbs static ip is set
Make sure you have the lights set to LAN Mode in the Yeelight App.

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Checklist

Yeelights unavailable in HASS but still available in Yeelight app？

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step 1.

root@raspberrypi:~# ping 192.168.2.111
PING 192.168.2.111 (192.168.2.111) 56(84) bytes of data.
From 192.168.2.50 icmp_seq=1 Destination Host Unreachable
From 192.168.2.50 icmp_seq=2 Destination Host Unreachable
From 192.168.2.50 icmp_seq=3 Destination Host Unreachable
From 192.168.2.50 icmp_seq=4 Destination Host Unreachable