I flashed this firmware on to my new S20 by following the method shown here. Flash was successful but when I connected the S20 to the power socket, it does not turn on. No led blinking, its as if its dead. I tried to flash again, but now my system dose not even detect the device and it does not go into flash mode.
Below is my flash output -
C:\Users\ravi_\Desktop\Smartthings\ESPEasy_R120>esptool.exe -vv -cd nodemcu -cd 115200 -cp COM8 -ca 0x00000 -cf SonoffS20.ino.generic.bin
esptool v0.4.6 - © 2014 Ch. Klippel ck@atelier-klippel.de
setting board to nodemcu
setting board to 115200
error: unknown board: 115200
known boards are: none ck wifio nodemcu
setting port from COM1 to COM8
setting address from 0x00000000 to 0x00000000
espcomm_upload_file
stat SonoffS20.ino.generic.bin success
setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
warning: espcomm_sync failed
error: espcomm_open failed
C:\Users\ravi_\Desktop\Smartthings\ESPEasy_R120>esptool.exe -vv -cd nodemcu -cd 115200 -cp COM8 -ca 0x00000 -cf SonoffS20.ino.generic.bin
esptool v0.4.6 - © 2014 Ch. Klippel ck@atelier-klippel.de
setting board to nodemcu
setting board to 115200
error: unknown board: 115200
known boards are: none ck wifio nodemcu
setting port from COM1 to COM8
setting address from 0x00000000 to 0x00000000
espcomm_upload_file
stat SonoffS20.ino.generic.bin success
setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_open
Uploading 345760 bytes from SonoffS20.ino.generic.bin to flash at 0x00000000
erasing flash
size: 0546a0 address: 000000
first_sector_index: 0
total_sector_count: 85
head_sector_count: 16
adjusted_sector_count: 69
adjusted_size: 045000
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
setting serial port timeouts to 10000 ms
setting serial port timeouts to 1000 ms
espcomm_send_command: receiving 2 bytes of data
writing flash
…
starting app without reboot
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
espcomm_send_command: receiving 2 bytes of data
closing bootloader
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete