Reverse engineering Xiaomi air purifier NFC stickers
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Reverse engineering Xiaomi air purifier NFC stickers
1–10 of 118 posts
Re: Reverse engineering Xiaomi air purifier NFC stickers
#2> This will significantly decrease the waste footprint from a whole filter.. to just a sticker
I don't think I understand which problem this solves. I can turn on my Xiaomi Air Purifier with or without a filter. It's just a fan. Is this about a new version that does not work with an old filter?
Re: Reverse engineering Xiaomi air purifier NFC stickers
#3I think my question with this would be:
How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and after that it isn't purifying the air as well as it could be.
Re: Reverse engineering Xiaomi air purifier NFC stickers
#4> This will significantly decrease the waste footprint from a whole filter.. to just a sticker I don't think I understand which problem this solves. I can turn on my Xiaomi Air Purifier with or without a filter. It's just a fan. Is this about a new version that does not work with an old filter?
Mine too, I have the 2S.
However I have read that the new air purifiers (from the 3 onwards) switch off after a couple of hours when they don't see a filter sticker, or a used-up one.
Re: Reverse engineering Xiaomi air purifier NFC stickers
#5I think my question with this would be: How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and…
I have one and it tracks very poorly. It tracks only the usage time regardless of how fast the fan is running.
When on auto, it is mostly spinning at idle, hardly sucking air through the filter, and as such it's hardly contaminating the air filter (in fact the airflow is so low I stopped using auto mode at all, there is just no point).
It also doesn't take into account how contaiminated the ambient air is (even though it has an air quality sensor on the one I have).
I run mine at about 40% so I use the filters about 2-3 lifetimes :) Even that is a pessimistic approach IMO because the air here is very clean. I mainly have it because of hayfever (pollen allergy).
Re: Reverse engineering Xiaomi air purifier NFC stickers
#6I think my question with this would be: How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and…
The filter durability is time-based in my experience:
I set up several air purifiers at the same time in December 2021 but used them in different areas, i.e., with different filter loads. The air purifiers ran 24/7 and mostly in automatic mode, except for some hours after known possible coronavirus exposures.
Official end of filter life was reached after about five months and for all filters on the same day. The air purifiers are still running tough, that's a plus!
Xiaomi recommends to replace filters every 6 to 12 months. The recommendation, however, is based on the use in polluted Asian cities, I guess. We have rather clean air here. I therefore assume that it is safe to use the filter for an additional few months.
Re: Reverse engineering Xiaomi air purifier NFC stickers
#7I think my question with this would be: How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and…
I have one and it tracks very poorly. It tracks only the usage time regardless of how fast the fan is running. When on auto, it is mostly spinning at idle, hardly sucking air through the filter, and as such it's hardly contaminating the air filter (in fact the airflow is so low I stopped using auto mode at all, there is just no point). It also doesn't take into account how contaiminated the ambient air is (even thoug…
In automatic mode, different ppm level should result in higher fan speeds. That is at least the case with my filters. Cooking for example can be a trigger.
You are of course right that automatic mode does not do much. At the same time, higher fan speeds are noticeable (and annoying).
Re: Reverse engineering Xiaomi air purifier NFC stickers
#8I think my question with this would be: How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and…
In my unit it's just 365 days countdown.
OTOH a lot of the Xiaomi purifiers have built-in air quality monitor so really you can just ignore the useless filter health value and figure out if the filter is working for yourself, based on how it performs.
Re: Reverse engineering Xiaomi air purifier NFC stickers
#9> This will significantly decrease the waste footprint from a whole filter.. to just a sticker I don't think I understand which problem this solves. I can turn on my Xiaomi Air Purifier with or without a filter. It's just a fan. Is this about a new version that does not work with an old filter?
I have Air Purifier 3H, and with an old filter it displays big red “0%” most of the time, instead of showing PM2.5 level. Which is annoying.
And the filter works effectively a few times longer than what is displayed (at least according to the PM2.5 sensors on the same device).
Re: Reverse engineering Xiaomi air purifier NFC stickers
#10I think my question with this would be: How accurate is the filter durability that the normal filter air purifier tracks? If it tracks reasonably well (which, without more info, I have my doubts for the same reason printer ink cartridge capacity tracking is bad), wouldn't using these stickers kind of defeat the purpose of using the filter in the air purifier, since these kinds of filters do have finite durability and…
The filter durability is time-based in my experience: I set up several air purifiers at the same time in December 2021 but used them in different areas, i.e., with different filter loads. The air purifiers ran 24/7 and mostly in automatic mode, except for some hours after known possible coronavirus exposures. Official end of filter life was reached after about five months and for all filters on the same day. The air…
HEPA filters get more effective overtime in exchange for more restricted airflow. Thus the failure mode is "air is not flowing" and not "air is not getting cleaned".
At home I use 3 air filters in various rooms. These are standard/mid-range Japanese Sharp filters. Japanese because we live in Japan, not because Japanese HEPA filters are special. The filters themselves can be bought for about 30$ online. When the filters get near end of life I've had success by switching to a higher fan speed. This is not magic, at some point even on the highest setting airflow starts to match the old medium speed. The high speed mode consumes about 4x the electricity of medium speed.
The net result is there exists an intersection point where continuing to use a filter costs more money than replacing. For us in Japan with expensive electricity this point exists sometime after the airflow has diminished but the filter is viable on high speed. In cheap electricity countries the filter might become unusable before electricity becomes a significant cost.