Mi Robot vacuum

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Re: Mi Robot vacuum

Postby jesi » April 21st, 2017, 12:47 am

Yep, that is issue =(

I have reported that many months ago.

Only trick is put painters masking tape to bottom sensors, but then there is no cliff detection anymore.

Maybe we all send report to xiaomi, so they really understand that this is issue what should be fixed ASAP?
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Re: Mi Robot vacuum

Postby glnc222 » April 21st, 2017, 12:45 pm

All brands of robots have this problem with dark floors because of the standard type of proximity detectors used, depending on intensity of reflected light beams off the floor. Covering the cliff sensors is the standard treatment.
The detectors work with a lot of visibly black materials, but apparently certain carpets and hard floors are uniquely absorbing in IR light.

I am experimenting with an alternative method using parallax which would require making custom sensor PCB's and still might not work. Will see, but higher costs could be incurred. Will report in the hacking forum.
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Re: Mi Robot vacuum

Postby Panache » April 23rd, 2017, 9:10 pm

My Xiaomi gives an error message with wall to wall carpet that the brush is dirty, but I just clear the error and resume the cleaning. Usually, it finishes with no issues. Very little dirt on the brush overall, seems the unit is mostly engineered for hard surfaces so if it picks up too much resistance in the brush, it gives an error. Would probably not recommend the unit for shag wall to wall carpeting (but then again it's not 1980 anymore!)
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Re: Mi Robot vacuum

Postby indiahill » April 23rd, 2017, 9:50 pm

glnc222 wrote:All brands of robots have this problem with dark floors because of the standard type of proximity detectors used, depending on intensity of reflected light beams off the floor. Covering the cliff sensors is the standard treatment.
The detectors work with a lot of visibly black materials, but apparently certain carpets and hard floors are uniquely absorbing in IR light.

I am experimenting with an alternative method using parallax which would require making custom sensor PCB's and still might not work. Will see, but higher costs could be incurred. Will report in the hacking forum.


wow you are an expert! looking forward to your report.
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Re: Mi Robot vacuum

Postby petermet » April 28th, 2017, 8:49 am

I have a Xiaomi vacuum, only a month old. One of the wheel assemblies is not working. The wheel is stiffer that the other to turn and sounds different. I have open the case and removed both assemblies. There is nothing wrapped around it and I suspect the motor has died.

I have looked online for a replacement assembly but cant find one or the manufacturers contact details. Can anyone help. Sending back the machine seems overkill as I would need to pay for postage back to China.
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Re: Mi Robot vacuum

Postby oldsalt » April 28th, 2017, 8:14 pm

Had this thing for a week now and I’m pretty impressed. I have nothing to compare to as this my first robot vacuum.

Question I have is, is there a way to operate it using the app without being online?
If I manually push the power button it will start it’s job. (doing it for the first time as I write this) However mapping does not work.
I guess my question is, why does it have to be online for the mapping to work and display if the unit is connected to my network but my modem is off? And, where is that information going?

Apologies if this question has been raised previously. I have only gotten through about half the posts.

Thanks for any information.

**Update** The Mi Robot will do a complete job but the mapping will not appear in the app until the app goes online. So obviously the information from the vac goes to a server (Xiaomi?) and then gets uploaded to the app.
Any way around this?
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Re: Mi Robot vacuum

Postby hellfi » Yesterday, 5:16 am

Depends how much time/money you are willing to spend, but probably the answer is no, no way around this.
Few options: Set up your own server with a valid certificate for the xiaomi "cloud" services, reverse engineer their server, recreate the infrastructure to accept the robot's uploads
Get access to the robot's OS, change the server address
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