@György-Farkas
Thanks, all worked well!

@Marti-MG said in Expansion dock lacks of several pins including GPIO18,19:

Anyway, I suspect there's not much I can do about it then, am I right?

You could do it - but it's not too easy. ;-)
You should remove / desolder 2 SMD ICs (6 pin SOT23 marking C145, 5 pin SOT23 marking UP5 - in the red box) to obtain GPIO18 and 19 near Omega's header.

After this mod you would lose the Power Dock Checking the Battery Level function. :-(

@bearer The Omega-Mini-Dock schematic is basically correct. This can be the version2 board with original Omega header pinout (U5). For Omega2(+) one should replace U5 to a correct header pinout and change RXD, TXD to RX0, TX0 respectively.
There are no TVS diodes (D12, D13, D14) on the Minidock.

Only these are the hardware differences between the Minidock versions:

R77, R83, R84 are 1 kOhm SMD resistors (marking 102) on the v1 board
vs.
R77, R83, R84 are 3 kOhm SMD resistors (marking 302) on the v2 board

Minidock version1 (photo by @Luciano-S)

To fix the problems of the Minidock version1 board is fairly simple:

remove / desolder the R77, R83 and R84 resistors - IMHO this is the best solution :-) or solder a 0 Ohm (or a piece of wire) to the top of the R76, R81 and R82 resistors (ie. replace them with 0 Ohm) or change R77, R83 and R84 1 kOhm to 3 kOhm (so you'll have a genuine version2 Minidock ;-)

I hope all above info are correct but - as usual - make these modifications at your own risk.
Good luck!

Do you want further backround info?

These two Docs articles would be the best place to start:
https://docs.onion.io/omega2-docs/running-a-command-on-a-schedule.html
https://docs.onion.io/omega2-docs/transferring-files.html - while this talks about transferring files TO the Omega, the same concepts with rsync and scp apply

@Zheng-Han You should simple provide some checksum file for each img (bin) file in the repo.

@Swapnil-Katpally After a factory reset, your Omega’s SSH signature will be different. You'll need to modify the known_hosts file on your computer.
See our Docs for more details: https://docs.onion.io/omega2-docs/factory-reset.html#a-note-about-factory-resets-and-rsa-key-warnings

Glad you got the memory issues resolved, sadly that is far as I can take ya, I know nothing about Python... Hopefully you can get support on here.

worth mentioning that the 5 "accessible" ethernet are on the omega2s which is quite a bit more expensive.

This may be a stupid question, but where do you find the Datasheet, with the BGA information? I can't find any information on how ot connect it.

@CAP-33
Does not make sense to force a unfit square post into the round hole.
(Actually one can't even buy a camera with I2C or serial interface to the outside world. The manufacturers understand the market and technology, don't they.)

@Unbioctian take a look at /usr/lib where the library shared objects are kept and /usr/include where the header files are kept. You'd notice some library objects do not have corresponded header files. The i2c C library is available for you and is called libonioni2c. The source code can be found in our GitHub repo. For more info on compiling C/C++ on the Omega please refer to our official documentation and i2c C Library

Solved.

Not exactly sure what fixed it, but after trying to connect again it gave me the option to skip, after spiking it connected to the Wi-Fi and downloaded & installed the firmware update. All working now.

I also wanted to build my own firmware, but this seem not to work, atleast if you want a working wifi connection.

What i did is made my own openWrt package. The only problem you got, is you can't remove anything from the build just add it.