I spent my evening on this but I finally made it.
Using the NodemCu formatter and standard parameters it worked...
I carrefully flashed. Then I restarted and the ESP_XXX SSID appeared. I connected to it but it wasn't giving me any IP address. you wait a little bit once connected then it created the ESPmac SSID, and I was able to access the 4.1 IP .
now seems to work perfectly...
by the way you don't have any idea for the DS18B20 issue that I have with the -127 value returned?
don't hesitate to send me a private message I don't know if I can do it