Erase flash of the esp
esptool.py -- erase_flash

One of my smart ESP devices wasn’t responding after a power down.
I debugged the problem by connecting it to a serial interface. On the comandline I saw that the chip wasn’t able to connect to its WIFI. To check wether the chip was fried or if its just the software thats messing around I had to delete all of its storage, to reflash the software afterwards. To do that i used the comands stated above.