I have two ESP 8266-01 modules with AT v0.22 und SDK 0.9.5. I tried to update one of them to SDK 1.2 but now it won't boot any longer.
For flashing I used the NODEMCU Flasher and the binaries are from the "eesp_iot_sdk_v1.2.0" archive:
boot_v1.2.bin
user1.1024.new.2.bin
blank.bin (2x)
And I set up these offsets:
boot_v1.2+.bin 0x00000
user1.1024.new.2.bin 0x01000
blank.bin 0x7e000 & 0xfe000
But after flashing, the device no longer responds on serial connections.
The only solution was to flash an old "v0.9.2 all-in-one" binary file with offset 0x0.
It never works if I have to flash multiple files.
What am I doing wrong?