Develop Bugs

[Q] Accelerometer not correctly calibrated? Is this normal?

How well-calibrated are the accelerometers in your GNs? Mine seems to be slightly off. Laying the phone down on a level surface, this is the reading I get from GPS Status (which also displays accelerometer data):
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The interesting parts are the "Pitch/Roll" numbers and the yellow "blob" at the center of the compass. The pitch being a bit off (N01 = 1 degree tilt down/forward) can probably be explained by the "hump" on the back of the phone, but the roll being off (V02 = 2 degrees tilt to the left) is a bit more troubling. I have to noticeably tilt the phone to the right to get a 0 degree reading. Ok, so this isn't really a problem in everyday use, since it's a pretty small deviation, but it's a bit annoying to the perfectionist in me. So I would like to know whether this is "normal" or if one should expect a perfectly calibrated accelerometer.
EDIT: Actually, when I turn the phone vertical the left tilt error seems to pretty much double. Also, even though the phone shows close to 0 degrees up/down tilt when level, it doesn't show anything near 90 degrees when held vertical. It's more like 85 degrees, and I have to go way past "zenith" (so the phone's screen is angled slightly toward the floor) for it to show 90 degrees. This means that in apps such as Sky View I have to tilt the phone up a bit to get the horizon vertically centered on the screen.
Are these accelerometers just that inaccurate, or is it just mine?

Anyone? I would really appreciate some answers!

are there not apps that you can use to "recalibrate" and correct this? With all measurements systems there will be inherent errors due to the hardware, which is why the recalibration comes in, and there are simply too many variables, eg how flat is your flat surface? Is the casing on the phone flat?
Sent from my Galaxy Nexus using Tapatalk

leonironchef said:
are there not apps that you can use to "recalibrate" and correct this? With all measurements systems there will be inherent errors due to the hardware, which is why the recalibration comes in, and there are simply too many variables, eg how flat is your flat surface? Is the casing on the phone flat?
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
No, there's no way to globally calibrate the accelerometer. You can do it locally in certain apps, but the problem will remain in every other app.
And about the "variables": Of course such things will affect things a bit, but they can't account for all the issues I'm seeing. Not even close.

Nobody has two minutes to try this out and check what results they get...?

RoadHazard said:
No, there's no way to globally calibrate the accelerometer. You can do it locally in certain apps, but the problem will remain in every other app.
And about the "variables": Of course such things will affect things a bit, but they can't account for all the issues I'm seeing. Not even close.
Click to expand...
Click to collapse
This is another feature of my SGSII that I LOVE and miss on my GNEX (thank GOD I still have my SGSII).
On the SGSII under Settings there is the ability to calibrate your Accelerometer and the Gyro as well. Why they did not incorporate that into the GNEX I dont know. Maybe there is a Dev that can port the settings over?

yiannisthegreek said:
This is another feature of my SGSII that I LOVE and miss on my GNEX (thank GOD I still have my SGSII).
On the SGSII under Settings there is the ability to calibrate your Accelerometer and the Gyro as well. Why they did not incorporate that into the GNEX I dont know. Maybe there is a Dev that can port the settings over?
Click to expand...
Click to collapse
Yeah, it seems like such an obvious thing to include on the OS level, since these accelerometers clearly aren't always perfect out of the box (I've read about several people who have similar issues with their GNexuses).
How is the one in your phone? Do you experience any of the problems I'm describing?

SyPressure - Barometer [Pics]

Well, I was bored so I downloaded a barometric pressure app called SyPressure
It's actually pretty dang neat. For pressure noobs like me here is a quick fyi.
High - Clear Skies
Rising - Clearing or improving
Normal and Stable - Fair
Falling - Degrading
Slightly Lower - Usually Cloudy
Low - Rainy and Stormy
As a general guideline, think of 30 inHg (1016 millibar) as being a normal level. World records vary from a high pressure of 32.0 inHg in Siberia to 25.7 inHg during a typhoon (both readings are off the scale of most barometers). For the US, extreme levels can be considered as 30.5 inHg and 28.5 inHg.
Click to expand...
Click to collapse
Barometric pressure varies with altitude. A higher elevation will have less atmosphere above it which exerts less pressure. To keep readings standard across the world, barometric pressure is to be indicated at sea level. Therefore, readings at elevations other than at sea level will require a correction factor which is based on the elevation and the air temperature (colder air weighs more and will require a greater correction).
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cool

boodies said:
Well, I was bored so I downloaded a barometric pressure app called SyPressure
It's actually pretty dang neat. For pressure noobs like me here is a quick fyi.
High - Clear Skies
Rising - Clearing or improving
Normal and Stable - Fair
Falling - Degrading
Slightly Lower - Usually Cloudy
Low - Rainy and Stormy
Click to expand...
Click to collapse
Finally a neat way to actually use the Barometer inside our phones.
Is this more accurate than a weather forecast though since its getting readings around you?
What other uses can the Barometer bring? I had read that the reason they included it in our devices was to get a much better accuracy on location when using GPS.

Is there a list of phones that have this barometer built in?
Found them, these at least.
Nexus
GS2
GS3

Im surprised it has taken this long for an app like this to make some proper use of the barometer given these sensors have been available on phones for more than a year now.
---------- Post added at 11:59 AM ---------- Previous post was at 11:57 AM ----------
And also does the weather icon change aswell? can anyone confirm?

I used this a while back on the Galaxy Note, and it's a fantastic piece of software, but it did kill my battery very quickly, so had to remove it

Finally, an app that can use that damn barometer!
Thanks!

Nice app.. I downloaded it. Once I get my Nexus 4 I will buy it (after making sure its compatible).

Pretty nice app! Thanks for sharing it! :good:

tzmueller said:
Nice app.. I downloaded it. Once I get my Nexus 4 I will buy it (after making sure its compatible).
Click to expand...
Click to collapse
Tested on my Nexus 4, works fine.

Very nice app
Yeah... will try this out....

dodgem2012 said:
Is there a list of phones that have this barometer built in?
Found them, these at least.
Nexus
GS2
GS3
Click to expand...
Click to collapse
GS2 (I9100) doesn't have barometer sensor. App will not work. Just a heads up

Surprised
My goodness I was very surprised at the accuracy of this app. Sent it up tied to a weather balloon(yeh, I was scared I would lose my device), and it accurately measured the pressure, so my surf report buddies and I included it in our weather/surf report, and true as nuts, the waves came as the pressure was dropping. Awesome app, will give all credits during next surf report to the developer. Hey bro, you got some super amped surfers all over Cape Town.

Looks nice but the TF101 doesn't have this piece of hardware if i'm right.
Some people commented the app, stating it gives false informations, maybe you should forbit the download for incompatible devices.
Regards

There's a few more barometer apps, I use one called Barometer Monitor, it lets you tell it how often you want to record the data, which helps with battery impact. There's another app that recently got some news called PressureNET which sends your data and location back to a server, and is being lauded as a way of distributed data gathering, similar to some research in using accelerometers in peoples cellphones to detect/predict earthquakes.
One interesting issue is that I work on the 23rd floor, so the pressure drops then rises again every few hours as I go back to ground level. It would be cool if you could tell an app that you are in this kind of an environment so it could "normalize" such sudden transitions.

I cannot get it from playstore, is it ok with the dev if someone attache for me the apk file?

My review of the Miband 1S w/ pictures

I've used many different smartwatches over the past months but as they tend to have a rather weak vibration motor I started to look into a device to use along with it solely for notifications, and then I found the Miband 1S which seemed to fit my needs. I've positive experiences with Xiaomi devices in the past so I placed an order, I've now used the Miband for about a month and this is my review of the unit. Let's jump into it, shall we?
The Miband itself comes in a tiny little box that don't reveal all that much about the actual product, other than a Xiaomi logo on the front and on the back of the box there's some technical specifications that are related to the product. When you open the box, the first thing that you'll find is the actual "core unit" attached to a thick piece of cardboard, and below it is the accessories that are included with the product. There's not many accessories other than a special proprietary charging cable with a flat noodle-styled cable and a band made of some kind of rubber.
After removing the unit, I almost instantly felt that the item was made out of high quality as it feels very solid, and it definitely doesn't feel cheap in any way I could think of. The front of the core unit is covered by a plate made out of anodized aluminum and there's also 3 LED's, and on the back is the actual sensor that's used to measure the heart rate. On the side there’s nothing more than 2 pins that are made out of copper, that are used to charge the unit as it’s waterproof.
To fully take advantage of the MiBand 1S you’ve to sideload an application that’s available on the Chinese MIUI appstore, as the app for Miband that’s available on Google Play is heavily outdated and doesn’t support the heart rate monitor. After the app is sideloaded, the pairing process was very straight forward as the app is in plain English and guides you through the entire process.
So when it comes to the app for the product, I really like the fact that it’s easy to navigate and does display the data in a way that’s very easy to understand, and it’s also very easy to make changes to the settings of the band. I also like the fact that there’s a running mode and that you can manually measure the heart rate from there. However, there’s some major disadvantages with the app such as that it does not offer not many settings and lacks some features such as no proper notification support. However, with third party apps such this isn’t really a problem and those apps work along with the official app with no issues that I could find.
When it comes to the tracking the band does, I’m quite surprised by that it’s pretty accurate for the price that this unit comes in at. The statistics are pretty much the same as the ones that my other unit, Moto 360, counts while wearing both devices at the same time. The data isn’t very detailed but it does what it’s supposed to and make monitoring easy, and the added heart rate sensor is a nice bonus that bring additional value to the product.
The battery life isn’t as good as with the older generation of the Miband, but that’s primarily due to the added heart rate sensor that consume additional battery. For me, the Miband lasts about a week on a charge with all the settings enabled that are said to decrease the battery life but for me that’s not a problem as for me it’s a habit to put the device on the charger.
So conclusion time; the Miband 1S is one of my favorite smartbands out there due to its competitive pricing. The battery life is decent and the vibration is strong, and the data it collects are accurate. There’s no real reason not to buy this device and for the $26 that it costed me it’s certainly one of the better purchases I’ve made lately!
Bought my unit @ Everbuying.net for $26 and the link is:
http://www.everbuying.net/product1113384.html

Pictures
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Koogeek BP2 Smart Blood Pressure Monitor - Unboxing & Review

This is the Koogeek Smart Blood Pressure Monitor
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Unboxing
The package comes with almost no accessories: 1x Micro-USB Cable (to charge the internal battery), 1x User Manual, 1x Quick Start Guide, 1x Quality Certificate, 1x Warranty Certificate and finally the Monitor (of course). Basically, most of the content is paper.
As regards the Build Quality, well it is as good as an old-style blood pressure tool, probably better than standard digital ones though. The main part of the device, where all the magic happens, is made of Aluminum for the External Chassis, and of course plastic for the internals. It feels really solid, and after many days of usage it is still as good as new.
On the upper side there is the main Power/OK button, a Power/Charging LED (flashes while charging, steady when full), a Reset Button and the Micro-USB port for charging.
As regards the arm strip, it is made of the classic fabric used for this kind of accessories, photos show everything, including what words can't even explain.
The Display is really sharp with a nice blue backlight and also easy to read thanks to the big size.
Usage
There are three ways to use this monitor.
1) Without BT/WiFi (so as a classic digital monitor).
2) Using BT that trasmits data to the Koogeek App in real-time.
3) Using WiFi that transmits data to the Koogeek Server in order to sync everything even without having access to the app or smartphone.
When it comes to the measurement, it is really smart. First of all it is necessary to configure the monitor for the first time using the Koogeek App, then everything is set for any future usage.
Luckily the app is really well-made (with an annoying advert when you start it though), available on the Play Store, and compatible with Google Fit.
This is the advert, or popup, i mentioned before, i don't get why they choose to show this when the app gets started considering that the app itself is made for this usage (lol).
There are lots of features, most of them related to other devices (weight monitor, etc...) but the amount of details shown for the Blood Pressure is not limited at all. There is an indipendent graph for each section, blood pressure and heart rate, and it is possible to start the measurement remotely.
Here you can see it in action.
Also, something that i consider a must, is the possibility to add multiple users, in order to share the monitor with different people in my family. It is much easier to use a single smart monitor for everyone so that it is possible to keep track of each other' health.
As regards the precision, well being FDA certified guarantees maximum precision, and also the internal hardware is not bad at all, with Texas Instrument chipset and some other nice hardware.
Conclusions
Living in a country where Smart Home/Health is still sci-fi, this is something that really makes the difference, transforming something necessary less annoying and smarter.
This monitor impressed me for the build quality, and i know it isn't the cheapest monitor that can be bought, i admit it, but i wanted something complete and reliable, so i went for this one.
After having used it for more than 15 days, i can recommend this product to anyone that would like to get into this smart home/health world.
Pros:
- Reliable
- Dual Connection BT/WiFi
- Excellent Koogeek App with Google Fit support
Cons:
- Koogeek App doesn't start automatically
Rating: 9.1
Packaging and Accessories: 7
Design and Materials: 10
Usage: 9.5
Price: 9 (based on Amazon price)
Official Product page: http://www.koogeek.com/smart-health-3076/p-ksbp2.html
You can find full-res images (I know, Quality isn't excellent) here: http://imgur.com/a/0v5KW​

Hi there,
1. Is somebody have found how to use wifi? And what for is it?
2. How to retrieve data through Google Fit (inside settings there are data sharing opption between them)
3. Might be somebody knows hot to set up in the report of blood pressure to show exact measuring time not ondly data.
P.S. Koogeg support is not answering.

Barcors said:
Hi there,
1. Is somebody have found how to use wifi? And what for is it?
2. How to retrieve data through Google Fit (inside settings there are data sharing opption between them)
3. Might be somebody knows hot to set up in the report of blood pressure to show exact measuring time not ondly data.
P.S. Koogeg support is not answering.
Click to expand...
Click to collapse
1. I use it, it supports only 2.4GHz networks so be sure to have your smartphone connected to it in order to configure properly the feature. It is used to sync the measurement result to Koogeek servers when your device is unreacheable via Bluetooth.
2. As far as i know Google Fit doesn't support blood pressure
3. No

Thanks Alberto for the answers. My doctor is always asking me to send him blood pressure report with exact time stamp when measurement was done. That is why I have bought this device hoping that such a thing will be implemented in the report. It's sad that I have deceived by myself. And sad that Koogeek does not going in to support.

Barcors said:
Thanks Alberto for the answers. My doctor is always asking me to send him blood pressure report with exact time stamp when measurement was done. That is why I have bought this device hoping that such a thing will be implemented in the report. It's sad that I have deceived by myself. And sad that Koogeek does not going in to support.
Click to expand...
Click to collapse
Let me try to provide this feedback to someone i know at the company, hopefully he can help you.

Oh my, Alberto I couldn't imagine that this is possible. Thanks from the high pressure blood heart for your efforts ?
How I can thank you?!

Barcors said:
Oh my, Alberto I couldn't imagine that this is possible. Thanks from the high pressure blood heart for your efforts ?
How I can thank you?!
Click to expand...
Click to collapse
Hold on, I can see the time of the measurement if I click on it lol

Preview

During measuring, in measuring window - yes, but it is not in the report. Do for yourself data export to your email and you will see.

Barcors said:
During measuring, in measuring window - yes, but it is not in the report. Do for yourself data export to your email and you will see.
Click to expand...
Click to collapse
Got it. Feedback forwarded!

Chuwi Hi10 X Review and Discussion thread

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This came in the mail a while ago and thought I'd share a small review and open a thread for discussion.
Let's start with some basic specs:
CPU: Celeron N4100 @ 1.1Ghz
RAM: 6GB
Storage: 128GB onboard flash
Quite boring I know, but it seems pretty adequate for a small form factor 2 in 1 tablet. There is no point in running bechmarks in this kind of hardware, but surprisingly it is quite snappy on daily use. I've had no problem doing photo editing work on the device with Adobe's usual suspects. I expected Photoshop to be fast, but not Lightroom ( that one tends to struggle a bit in a big library, no matter the hardware), it was a pleasant surprise to see it working fine. Daily coding/writing/web browsing is a breeze with the addon keyboard and the battery while I could not find the specs on it, it seems to last a good 3 hours of heavy use with brightness set high.
Things worthy of mention on this device:
Trackpad really doesn't like water or sweat
Big battery + all aluminum construction= a top heavy device when in laptop mode. Also a giant heatsink, which is good
Cameras: both are decent enough for video calls, but nothing else. specially in low light conditions
Speakers: yes.
There's pen support and the Hi3 pen from the same guys is actually quite good
Touchscreen IPS Panel: Impressive colors and touch seems very good. Way too glossy for any outdoor work in bright sunlight
Limited range on wifi reception: It pretty much requires a direct line of sight with the AP or it will probably drop out, if connect at all. No speed issues. Probably related to the all aluminum construction and the antenna placement
Build quality: very good. Device feels solid and nice to use. Some corners are a bit sharp on the keyboard though.. not sharp enough to cut, but to irritate you while typing. I suppose some sandpaper can fix that quite easily
Some final thoughts: Very surprised with the performance/price index on this one and the size and packaging makes it perfect for a small walkaround laptop that you don't need to be too powerful or too expensive. The display stands out for me, as the color accuracy is pretty high and while vivid, not oversaturated. I'd like it to be a little lighter in total, but it's not a complete burden to carry. The charger situation is a bit weird as well, since it's using a 12v 2amp psu on a usb c hole, so you can't just plug it in any charger. I mean you can, but it will probably not work as intended. The two USB A ports on the keyboard dock albeit usb-2.0 they have been a lifesaver, since the device itself only has usb c ports.
Oh and I almost forgot. Windows 10 tablet mode is.. not good. It's certainly improved, but ux is horrible and inconsistent when you have to switch between tablet friendly apps and actual software you have to use. Most atrocious example is when trying to use Chrome with the touch keyboard. You tap on the location bar and the keyboard pops up. in full screen. and no, you can't see what you're typing. Thanks Microsoft!
On a more serious note: Cheap, solid build, x86 based small form factor 2 in 1 tablet with more than decent performance
Oh, did I mention the BIOS is quite open to config?
Maybe I'll try formatting and throwing linux at it. We'll see

Hi, did you try to install linux or Android x86? Thank you

does it have the necessary hardware requirements for windows 11?

yeahman45 said:
does it have the necessary hardware requirements for windows 11?
Click to expand...
Click to collapse
Yes it does meet windows 11 requirements.

Hi!
I'm testing Zorin from a live USB in this device (mine with Intel Celeron N4120 CPU) and the screen rotation works in the other way around, when I put the tablet horizontally, the image is vertical and upside down. Also the resolution looks very small and all available resolutions look even smaller. I do not decide to install it because of what I comment.
I have searched about this without finding anything. Can someone help me to make it work 100% with linux?
Thank you!