Do you also have one of new Sonoff DOUT devices?
OTA on these devices normally fails as most of available bin files do not support DOUT flash mode.
Here is the solution of your problem…
For initial flash over serial I use FLASH_DOWNLOAD_TOOLS_V3.6.2.2
This tool has option “DoNotChgBin”, normally not selected… and it shall stay not selected.
If you flash some bin file, this tool changes original bin file, dependent on chosen options QIO… DOUT etc.
If DOUT is selected it will write changed bin file to it’s temp “_temp_by_dltool\downloadPanel1” directory,
there where the original bin file is, with the same name, and new extension .bin_rep
That new bin file is then DOUT mode compatible 🙂
This way probably any bin file can be converted to DOUT compatible bin file.
Here you can download DOUT version of well known ESP Easy Uploader tool ESPEasyUploaderMega_1024.bin.
I do trust all the ideas you have offered on your post. They are really convincing and will definitely work. Still, the posts are too quick for newbies. May you please lengthen them a little from next time? Thanks for the post.
Been researching if I want sonoff devices in my house and have found several reports of the stuff burning up. Others say its ok. Anyway, search for sonoff fire and sonoff unsafe and make your own decision. Methinks I want to make a completely separate logic and mains device, with an optocoupler or something. Also I would want something that handles 16A, my fuses are 15A. With a sonoff 10A, the sonoff can get 5A extra before the fuse blows, that means sonoff burn good. With a 16A device, the fuse should kick in before the device is overheated.