4 lamps were bought: 1 + 3 in different stores at about the same time with a difference of a week. Three lamps were grouped into one for the corridor and one stood in a table lamp. The branches of the 220V lines are different and are connected to different machines. First, those in the corridor died, they simply stopped burning. The router does not see them, the bulbs are not reset, because after turning on they do not even turn on. Manually, they also do not connect to the phone, since they do not work. The next day, with exactly the same symptoms, the last light bulb in the desk died. It's some kind of collusion. 4 lamps cannot die at once. I'll open it up and look at this . I am more than sure that all the LEDs are alive and the firmware has been removed to complete the working life.
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