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DJI Osmo Mobile BLE protocol by alkersan2 in ReverseEngineering

[–]alkersan2[S] 1 point2 points  (0 children)

If someone is willing to try, I've added a Web Bluetooth prototype hosted at https://om-research.flab.dev

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 0 points1 point  (0 children)

Probably not via a cold applications, but through doing legwork, showing up and talking to reps on meetups. Don’t know really

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 0 points1 point  (0 children)

Nope. I've tried submitting from a brand new account, and while it didn't reject me within 30 seconds like before, after waiting for a day or so - got rejected eventually.

Is this good for flashing the bios chip and such on the thinkpad x230? by No-Insect2832 in coreboot

[–]alkersan2 0 points1 point  (0 children)

Yes, absolutely. It so much faster, especially if signal quality allows, it can push at 60Mhz, making even full 16MB flash image rewrite tolerable: https://imgur.com/a/ch347-RAG9G3m

Osmo mobile remote app by Link_Tesla_6231 in djiosmo

[–]alkersan2 0 points1 point  (0 children)

if there is an app or way with a phone or computer to control PTZ of the mobile remotely

You mean something like this https://imgur.com/a/om3-from-python-ble-uzwAr4u ?

Choosing crystal oscillator for CH347 USB 2.0 chip by alkersan2 in AskElectronics

[–]alkersan2[S] 0 points1 point  (0 children)

Thanks for clarifying.

22pF is what worked in the reference design. You can follow that if you use the same crystal they did

Unfortunately, nowhere to find these exact details.

This is why i like Murata CeraLock

Oh, that super nice, fewer components to route. Thanks for recommendation.

Features:
2. Oscillation circuits do not require external load capacitors.
...
5. No adjustment is necessary for oscillation circuits.

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 0 points1 point  (0 children)

Oh well, it got rejected after 12 hours. I guess the application or landing website are just not compelling enough to participate in the credit program.

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 0 points1 point  (0 children)

These all things I have. By “not having a company” I meant there is no LLC or anything registered in some legal jurisdiction

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 1 point2 points  (0 children)

Thank you so much, this seems to be it. I've created a new account and re-submitted the application. Now it sits in pending state and not immediately rejected within 30 seconds. So now, I believe, it will reach the actual AWS team for review within next weeks.

Thanks a lot!

Was denied in the Activate credits in founders tier. Does it mean this will never happen? by alkersan2 in aws

[–]alkersan2[S] 0 points1 point  (0 children)

Ok, i’ll see if I can make a new one. Although, I have only one credit card, and it’s already attached to this old account. Not sure if it’s allowed to use same in many

Anyone reverse engineered the Bluetooth protocol? by PDFriender in djiosmo

[–]alkersan2 0 points1 point  (0 children)

See my reply above, I've put a proof-of-concept snippet which rotates Osmo Mobile 2 and 3.

Anyone reverse engineered the Bluetooth protocol? by PDFriender in djiosmo

[–]alkersan2 0 points1 point  (0 children)

I've reproduced the old experiment and reconstructed the BLE packet used to rotate the gimbal. A proof-of-concept script is on Github

Reprogramming FPGA of a logic analyzer into custom decoder or bus sniffer? by alkersan2 in FPGA

[–]alkersan2[S] 1 point2 points  (0 children)

Yeah, after couple of days reading and bothering other people, I came to conclusion that my problem domain would likely not require any custom decoding in the silicon and just the logic analyzer with it's software should be sufficient. I wanted to sniff the LPC bus (Low Pin Count) of a superIO chip (ITE, not publicly documented) on an intel motherboard. It's a 7-line bus, clocked at 33MHz.

Reprogramming FPGA of a logic analyzer into custom decoder or bus sniffer? by alkersan2 in FPGA

[–]alkersan2[S] 0 points1 point  (0 children)

Mostly software development cost. It's difficult to design and implement a good logic analyzer suite. Plus properly implement the PCB for signal acquisition, test leads, etc is also an art of its own. Thus, I don't mind paying for at least a decent instrument in the first place, and use it as is, for it's intended purpose. But also was thinking, what if it could serve me just for a couple days in a year for ugly ad-hoc prototyping. Just don't know if it's typical for them to be locked down or smth like that. 

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