make pre-calibration time shorter

[ishikawa]

Posted on December 22, 2016 at 23:04

Hi

I'm using multiple vl6180x devices and want them to work more quick.

However, when the second device starts in pre-calibration time of first device, the range data looks wrong.

When I set the interval more than 4ms between two devices, their range data looks correct.

So, I guess that in the case that two devices work simultaneously in their pre-calibration time, the interference occurs.

Then, I would like to ask whether I make pre-calibration time shorter than 4.3ms or skip pre-calibration phase.

I read the data sheet of vl6180X and found the pre-calibration time is fixed.

However, I want absolutely multiple vl6180x devices to work simultaneously.

Otherwise, I want them to work more quickly (less than 4ms interval). 

Is it possible?

Best regards

Ishikawa

#vl6180 #multiple-vl6180x #vl6180x

[Julien NGUYEN]

Posted on February 21, 2017 at 03:16

Hi 

Ishikawa San,

The best you can range with VL6180X is 100 Hz or 10 ms.

If your motivation to have faster ranging rate is to avoid the mutual interference, then you don't need to do that because multi ple VL6180Xs can work at the same time wihout interference.

Thanks,

Julien 

[ishikawa]

Posted on April 21, 2017 at 21:28

Hi, Julien

I apologize the my late reply.

Thank you for your response.

I really want to get the distance at 100Hz or every 10ms.

However, I don't know how I can do it.

Please tell me how to do that.

Does it realize only in the case that there are objects in near where 'Range convergence' does take less than 2.5ms?

Because Pre-cal takes 3.2ms and Readout averaging does 4.3ms in the default settings.

Best regards,

Ishikawa