We have been working on a major firmware update, aiming at solving wireless related bugs that may cause the device to go offline under congested network environments or when inter-working with specific wireless routers.
After several rounds of testing, we think it’s ready for beta release. So if you are already in the white list. you should be able to see that firmware version 1.5.9_0xyz is available now.
It is highly appreciated if you put any findings around 1.5.9 under this thread. Thanks in advance.
Yeelight Development Team