Hi, I have an LS4P LED strip controller. How can I reset it? I can no longer access the device.

No problem, you need to hold down the button when flashing to plug in the FTDI

I could not manage to make this work, esptool returns always that it cannot connect

I managed to flash the firmware by connecting first the USB-to-TTL adapter, holding the button and then connecting the main power

did not work for me