Sonoff mini not responding

Hi everyone, I haven’t been able to use my sonoff mini for about half a year now. when I connect the device, the blue diode flashes 4 or 5 times quickly, then there is a short break and then again. The sonoff mini does not see any devices. I have a 2.4Ghz router and half a year ago everything went without problems. Is it possible to somehow reset the sonoff mini?