I just made a DIY expansion dock for my Onion Omega2+ . i needed to flash my onion . my dock equipped with CH340G USB to serial chip. after loading to PuTTY , when trying to go to Recovery mode by pressing reset + power switch, then this is what happening......
after booting to OS there is no problem . everything is working perfectly ..
what is really happening ....?
thank you
I successfully connected webcam to omega 2+ and watched live view over web bowers . so,, is there any possibilities to record web cam videos in omega 2+ ?
I m just making an expansion dock for Omega 2plus.. this simple version includes
CH34O for USB to Serial .
USB hosting ,
3 way power input, thats all..
please check and give me suggestions for better performance. is ( USBLC6) esd protection compulsory ?
schematic
@dileep-kv i had experienced same boot problem(via wifi) when i was powering from Uno.. change power source. use 1117 3.3 voltage regulator or equivalent.
Iam not using any expansion dock for my Onion Omega2+. directly connected to regulated 3.3v. ON first time setup, firmware downloading stopped at about 20% . so i have tried "console > settings >firmware upgrade ", same thing append again.. after refreshing this page, tried one more time, that time download bar slightly moved forward , then stopped.... any solution .. ??? 
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@György-Farkas i was looking this schematic, https://github.com/OnionIoT/Onion-Hardware/blob/master/Schematics/Omega-Expansion-Dock.pdf . i noticed this part ....
..
D12,D13,D15 is this important ? i need to connect USB webcam , USB flash drive etc .Value of resistors (R89 0R and R90 0R) is 0 ? the why placed here ?
@György-Farkas my OLD have 7 pin. but i know how to configure this one to I2C interface . thank you.. problem is solved..... 
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i have 0.96" OLED Display Module - SPI/I2C - 128X64 . i need to convert this display to OLED Expansion .is there any circuit diagram of OLED Expansion board ? help ....
I have purchased Onion Omega 2 plus recently . I dont have any EXPANSION DOCK now. I am just a student , my question is can i connect a usb flash drive using female usb connector to D+ and D- pin(USB)of Omega 2, by powering external 5v DC to USB female connector's positive pin while ground is common . any additional circuit needed for accessing USB ? help plz ..