[Same Chip ID] 3 sensors are not distinguished

[RoboSchmied]

Problem

There are 3 sensors in the openipc repos that have the same chip ID cb3e and are all seen as sc223a by ipctool.

• sc223a (30 fps)

#define SC223A_CHIP_ID_H	(0xcb)
#define SC223A_CHIP_ID_L	(0x3e)

• sc233a (60 fps)

#define SC233A_CHIP_ID_H	(0xcb)
#define SC233A_CHIP_ID_L	(0x3e)

• sc2239p

#define SC2239P_CHIP_ID_H	(0xcb)
#define SC2239P_CHIP_ID_L	(0x3e)

ipctool handling chip id cb3e

    case 0xcb3e:
        // XM
        strcpy(ctx->sensor_id, "SC223A");
        return true;

History

Here we found out that there may be different "versions" of the sc223a.

Thanks to @johndi3 who mentioned sc233a and thanks to @themactep who helped discovering the ChipID.

Solution

As done here we should regard more registers to differentiate between the 3 sensors.

ToDo

If you have one of the 3 sensors, please post the result of this command:

ipctool i2cdump 0x60 0x3100 0x310F

That will show your device ID + some more registers.

The output of my "version" of the sc223a (sold as sc5239s) is:

root@openipc-gk7205v210:~# ipctool i2cdump 0x60 0x3100 0x310F
       0  1  2  3  4  5  6  7   8  9  A  B  C  D  E  F
3100: 00 12 00 08 01 12 05 CB  3E 01 00 00 00 00 00

The important part here is CB 3E 01.
The register 0x3109 (here value 01) can differ between the 3 sensors.

We need to find the different values of register 0x3109 for each of the 3 sensors.
Thank you.

[widgetii]

I'd start from finding sensor's datasheet

[RoboSchmied]

I'd start from finding sensor's datasheet

Its hard to find anything from smartsense. They label their product flyers as datasheet. Even in Chinese Forums.
And the vendors say they do not have them.

[themactep]

Hard does not mean impossible. I have a few here https://github.com/themactep/openipc-wiki/tree/master/hardware/components/sensor/docs/ but not for these particular models.

[RoboSchmied]

Hard does not mean impossible. I have a few here https://github.com/themactep/openipc-wiki/tree/master/hardware/components/sensor/docs/ but not for these particular models.

Wow, thank you. Very interesting. How + where did you get them?

[themactep]

I know a guy who knows a guy, you know... LOL. Google and other search engines can do magic.

[RoboSchmied]

They are marked as Company Confidential and SmartSens Confidential - NDA only.
No chance for me with google & co.