Reset sonoff dw2

Hi! Can somebody help me reset sonoff dw2 wifi sensor?
I connected 2 new sensors to wifi, but it always offline in app and not reacting when closed or opened. Now i want reset both sensors, when i push pair button it don’t start blink. Nothing happens…
I tried new batteries, still non working
It can blink few times if i replace battery and start push pair button

According to the documentation, you need to hold the button for a long time (5 or more seconds) until it starts flashing

hello, It doesn’t change anything

Dude, necro thread after 10 months and just one sentence, seriously? Put even less effort into communication and surely a lot of people will be willing to help…