OpenMV Not being detected

Discussion related to "under the hood" OpenMV topics.
suresh_c
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OpenMV Not being detected

Postby suresh_c » Sun Aug 18, 2019 5:13 am

Hi,

I have a be openmv h7. My IDE is not able to detect the device. Windows does'nt detect it either as a USB.
I have done the following :
1. Tried it on Linux, RPi, and Windows.
2. Tried with multiple USB cables to be sure it wasn't an issue with the cable.

On boot, the MV starts with green LED Blinking, then White LED Blinks and then stops at Blue LED. It keeps blinking.

regards
Suresh
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kwagyeman
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Re: OpenMV Not being detected

Postby kwagyeman » Sun Aug 18, 2019 10:33 am

Sounds like the camera is fine. Are you sure the USB cable you are using supplies data and power? There are a lot of power only USB cables out there.
Nyamekye,
suresh_c
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Re: OpenMV Not being detected

Postby suresh_c » Sun Aug 18, 2019 11:10 am

kwagyeman wrote:
Sun Aug 18, 2019 10:33 am
Sounds like the camera is fine. Are you sure the USB cable you are using supplies data and power? There are a lot of power only USB cables out there.
Thanks for the Reply.

Yes, I am using a right cable. My android phone is detected as a drive on my laptop with the same cable.

Is there any other diagnostic tools i could use to debug whats going on ?

regards
Suresh
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kwagyeman
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Re: OpenMV Not being detected

Postby kwagyeman » Sun Aug 18, 2019 3:37 pm

Hmm, you don't get any sounds with Windows or anything else?

The USB pins may not have been soldered right. On the cameras we make we check that they work at the factory...

Try this, on Windows, connect the BOOT0 and 3.3V pin. Then plug into the PC. There should be a device that appears under the device manager (this is a windows admin tool that displays a tree view of everything in the system). Under USB devices you should see an ST DFU device. If that's not there then there's a hardware issue with the camera.
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suresh_c
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Re: OpenMV Not being detected

Postby suresh_c » Sun Aug 18, 2019 10:49 pm

kwagyeman wrote:
Sun Aug 18, 2019 3:37 pm
Hmm, you don't get any sounds with Windows or anything else?

The USB pins may not have been soldered right. On the cameras we make we check that they work at the factory...

Try this, on Windows, connect the BOOT0 and 3.3V pin. Then plug into the PC. There should be a device that appears under the device manager (this is a windows admin tool that displays a tree view of everything in the system). Under USB devices you should see an ST DFU device. If that's not there then there's a hardware issue with the camera.
Thanks for your reply.

The cable i was using is correct. Apparently the Pin on the Camera module has some loose contact. If i hold the pin tight it works, i am able to detect it on the IDE. But not long enough..
Tried with a few other cables, same result.

rgds
Suresh
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kwagyeman
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Re: OpenMV Not being detected

Postby kwagyeman » Mon Aug 19, 2019 2:27 am

Hmm, that's hardware damage. Can you post a pic?
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suresh_c
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Re: OpenMV Not being detected

Postby suresh_c » Tue Aug 20, 2019 1:00 am

kwagyeman wrote:
Mon Aug 19, 2019 2:27 am
Hmm, that's hardware damage. Can you post a pic?
cant seem to find a way to attach a pic? can i mail it somewhere ?

rgds
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kwagyeman
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Re: OpenMV Not being detected

Postby kwagyeman » Tue Aug 20, 2019 1:37 am

You just upload it via the Attachments tab next to the options tab.
Nyamekye,

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