Omega2+ unable to de-brick



  • Hey @Ken-Conrad, the serial is working fine, it is flashing of the USB that is the issue on that dock, the issues on the Power Dock is that I can't get the serial (connected via the RX1/TX1 headers) to work at all.



  • @Chris-Watt said in Omega2+ unable to de-brick:

    the issues on the Power Dock is that I can't get the serial (connected via the RX1/TX1 headers) to work at all.

    Unless I'm mistaken, the Omega2 serial console is on the actual UART0, as opposed to UART2 where most other builds for this chip put it. I'm not aware of any that use UART1.

    What I can't tell you however is if the labels on your dock directly correspond to the UART numbering of the MT7688 itself.



  • This post is deleted!


  • @Chris-Watt Chris Watt, thanks. Did you recently receive this Mini Dock, or is it an older model from the first round of Omegas?

    Onion says you won't find serial or an connection to TX0, RX0 pins (UART0) on the Power Dock. Extension Dock, yes.



  • I received it recently but I think it shipped early Jan if I recall correctly.

    Ugh so basically there is no useful serial at all on the Power Dock? How frustrating. I can't try the Ethernet recovery option in that case. As it won't recognise any of my smaller thumb drives I am not sure what to try next to get it working! It never allowed connections when I got it either, I just wanna play with it!!



  • @Chris-Watt If you have a loose USB<>3v3 serial converter you should be able to either solder wires to the relevant header pin pads of the dock, or perhaps use a wire-wrap tool to directly tap out signals from the Omega2 pins before plugging it in.

    (Only once in childhood did I ever use a wire wrap tool on a proper wire wrap socket, but it's remained lifelong favorite for making semi-lasting connections to both 100-mil and 2mm headers)



  • @Chris-Watt Yes, sorry to bear that news but perhaps this will save you some time. It is explained here that the Power Dock doesn't have a UART, required for the USB to TTL serial communication. Chris Stratton is right, there are many good choices for inexpensive TTL UARTS to make this serial connection. I am using several with Omegas. I second Chris's advice - you can solder to the bottom side of the dock at TX0 and RX0 or wire wrap would work. Then any of these 3.3V UARTs will connect the Power Dock to your PC- the 'Swiss Arm Knife' FTDI board at Sparkfun or this particularly nice one at Tindie or the eBay stuff.

    Make sure that you have a good and not too long USB cable. Hopefully, the USB port will work with your thumb drives on the Power Dock.



  • Unfortunately soldering things to the board just isn't an option because I will definitely destroy things with my soldering skills.

    Really I need a solution to the flashing issue, if I can't use the ethernet option then I guess we need some alternative solution, so what are the ideas for that, short of soldering things? I really would prefer not to have to buy more things I have no room to store (tiny apartment problems!).

    I wish it had been pointed out at backing time, I would have got the expansion dock instead of the power dock and just not worried about the battery things I wanted to test.

    Basically: how do I recover the Omega2+ with the equipment I have already have? It's never worked and it starting to seem like it was a dud :(



  • @Chris-Watt my omega2's haven't arrived yet, but late this afternoon I tried loading the same omega firmware you tried into a different MT7688 board via the USB stick method, and it seemed to work fine. So while we're technically using different versions of U-Boot, the fact that it isn't working for you suggests a fair possibility of either a power supply problem or a problem with the specific USB sticks you are using. The fact that your smaller USB sticks aren't working is particularly notable, and I think merits more investigation of possible power issues, or else reformatting one and putting only the upgrade file on it.



  • @Chris-Stratton I'm not sure it is power but not really sure how I can test that? Currently it is drawing the power and serial via my MacBook Pro's USB port, if I power via a PSU I lose my serial connection to trigger the upgrade at all.

    I did also try ensuring only the upgrade file was on the stick, it's very odd that the 4GB isn't working but the 128GB is. I am going to try and find a major brand smaller stick, Sandisk or whatever, just in case the stick itself is oddly configured/designed.

    Any suggestions for how to test things are appreciated!


Log in to reply
 

Looks like your connection to Community was lost, please wait while we try to reconnect.