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Published 20 hours ago • verified publisher icon Filipowicz251

CHUANGMI 720p

Open Unclezz opened this issue 6 years ago • 14 comments

Hi there, any chance to have this working on CHUANGMI 720P? This is using same chipset as mijia 720 I think: GM8135.

Thanks

Unclezz avatar Aug 03 '18 17:08 Unclezz

Is anybody willing to help to get also ChuangMi on customer firmware? @Filipowicz251 any chance you have time to help? :) This is also running on GM1835S.

photo_2018-08-04_08-54-51 photo_2018-08-04_08-55-04

Unclezz avatar Aug 04 '18 06:08 Unclezz

Apparently this camera does not have a serial to use in order to access u-boot. I suggest not to buy it.

Unclezz avatar Aug 09 '18 21:08 Unclezz

What about thos Q-Tx and Q-Rx?

willthrom avatar Aug 10 '18 08:08 willthrom

Unfortunately there is no output from there. I tried connecting to both Q-RX/Q-TX and 2-RX/2-TX that is on the left lower corner. Simply no output. On USB/UART connector LEDs are not even blinking. I took some photos of what I connected:

photo_2018-08-10_10-19-01 photo_2018-08-10_10-19-06 photo_2018-08-10_10-18-29

Note: I tried on 2 different boards :)

Unclezz avatar Aug 10 '18 08:08 Unclezz

That is odd..

willthrom avatar Aug 10 '18 08:08 willthrom

@willthrom well, what can I say? I agree. The only doubt I had was about the USB Adapter. I tried one with cp210x and another one with CH341. On both the result is the same... should I use something different?

P.S.: I am total newbie on this stuff!

Unclezz avatar Aug 10 '18 08:08 Unclezz

I guess you tried the other way. Rx -> TX , Tx -> Rx. I used a very old UART USB Adarpter and I didn't have any problem.

Keep in mind you might need to restart the camera to get any TX input....

willthrom avatar Aug 10 '18 08:08 willthrom

Yes, yes. Connections were RX to TX and TX to RX, but I even tried swapping the cables without any good result. Of course I did restart the camera to check for data to flow.

Unclezz avatar Aug 10 '18 08:08 Unclezz

Can you check with a voltage meter the GND with the TX? I see 3 GND....

willthrom avatar Aug 10 '18 08:08 willthrom

GND + TX --> 3.3V GND + RX --> ~3V

On both outputs (0-RX. 0TX and 2-RX, 2-TX)

Unclezz avatar Aug 10 '18 08:08 Unclezz

Correction... on the 0-RX and 0-TX I have both 3.3V On 2-RX --> ~3V and on 2-TX --> 3.3V

Unclezz avatar Aug 10 '18 08:08 Unclezz

BTW, GND (I think is normal) are all the same. There is continuity between them.

Unclezz avatar Aug 10 '18 10:08 Unclezz

Others have had some success with this camera. It started with an issue raised on FangHacks, then someone managed to get telnet working from a custom image (now hosted here with loose instructions.

There's a new claim that the RTSP server from here works, but I haven't tested it yet.

jymbob avatar Aug 23 '18 23:08 jymbob

I can confirm that the Mijia 720P firmware works. I've put together a repo with instructions: https://github.com/jymbob/chuangmi-720-hack

Note I'm not the author of any of the code, just collating it into a working package

jymbob avatar Sep 03 '18 21:09 jymbob