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?

Solar Charger

I've just found this App in play market: https://play.google.com/store/apps/details?id=com.szlab.solarcharger&feature=top-free
Has anyone here used it?
How can this work? :s
---
Edit: I'm trying it now under a strong lamp at my work and I can see the battery meter going down... fail.
Edit x2:
Just saw this in the description on the Apps market...
"Note: Of course this application is not charging your phone. You didn't think so, did you?! The only reason for this app is to collect the mentally challenged trolls - who never read the description this far - complaining about every app. Or you can fool your friends with this nice 'charging feature' if you like.
Do not let your device overheat! Be careful when you put your device under the direct sunlight!"

How come people at XDA fall for this? Read the app description which says it's a troll app
Sent from my GT-I9100 using Tapatalk 2

lol...!
of course it's not real, the 'dev' even states that in his description ...
'of course this application is not charging your phone. you didn't think so did you? the only reason for this app is to collect the mentally challenged trolls - who never read the description this far - complaining about every app.'
you didn't think it was real did you dear...?

rakeshishere said:
How come people at XDA fall for this? Read the app description which says it's a troll app
Sent from my GT-I9100 using Tapatalk 2
Click to expand...
Click to collapse
beanbean50 said:
lol...!
of course it's not real, the 'dev' even states that in his description ...
'of course this application is not charging your phone. you didn't think so did you? the only reason for this app is to collect the mentally challenged trolls - who never read the description this far - complaining about every app.'
you didn't think it was real did you dear...?
Click to expand...
Click to collapse
I did paste the description into my first post so your answer is there lol.

I'm surprised that Apple haven't sent the dev a cease and desist letter ;-)
http://www.ecofriend.com/entry/apple-granted-patents-solar-charging-3d-video-navigation/
Sent from my HTC One X using Tapatalk 2

Solar
But this technology is possible by capturing ambient light from both manmade sources and the sun and converting it into energy that can be used to recharge a device's central battery unit.
Hmmm...

skidz13 said:
But this technology is possible by capturing ambient light from both manmade sources and the sun and converting it into energy that can be used to recharge a device's central battery unit.
Hmmm...
Click to expand...
Click to collapse
Yep - it is possible if you have a load of solar panels surrounding your phone

gifton1 said:
Yep - it is possible if you have a load of solar panels surrounding your phone
Click to expand...
Click to collapse
...and furthermore it takes much more energy to manufacture a photovoltaic cell than it will ever reproduce in it's effective working life time. Plus the damage to the environment involved in the processing of the chemicals used to make these cells is something the solar panel industry doesn't want you to know. It's one of the reasons the world isn't solar powered yet.
The other one being that even the high-end (expensive) ones that only drop 1% efficiency per year, will see you wait approx 10 years before they've paid for themselves. Few people take the risk of needing to be in one place for that long just to see a return on their investment.
I love the reviews on that Solar Charger app. I got one of my mates with it (he just got his first smartphone). He complained it dropped the battery. I told him he needed to be facing south!

wnp_79 said:
I love the reviews on that Solar Charger app. I got one of my mates with it (he just got his first smartphone). He complained it dropped the battery. I told him he needed to be facing south!
Click to expand...
Click to collapse
The best part is reviews and comments who have used it.
Its a hilarious read
Sent from my Galaxy S2 powered by CM9

Solar
gifton1 said:
Yep - it is possible if you have a load of solar panels surrounding your phone
Click to expand...
Click to collapse
Yeah, maybe iPhone 6 will give a try

That app cured my cancer, seriously
Sent from my HTC One X using xda premium

Seriously how do people fall for this hahaha, funny though. Some bone people in this world. But I guess if your not into technology much, you wouldn't know how solar charging works.

Mcyates said:
Seriously how do people fall for this hahaha, funny though. Some bone people in this world. But I guess if your not into technology much, you wouldn't know how solar charging works.
Click to expand...
Click to collapse
They're hoping perhaps.

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Bluetooth Thermal Imaging addon Prototype

Hi everyone!
I've had some time to play around with the Prototype of the BT Thermal Imaging Addon for Android phones.
The Hardware and Software was designed by XDA Member "Mardaso", you can read about the begiinigs of the project in this thread.
Mardaso kindly sent me a prototype and allowed me access to the latest beta app for testing purposes.
I will attempt to show you what this device can do.
First some facts:
The Far Infrared Sensor built into this device is a Melexis MLX90620 16x4 Pixel Thermopile Array. It is a low resolution and low cost sensor. Despite the low resolution it is actually quite useful, 64 FIR Pixels can show up leaks around Windows and doors, find cold and hot spots and let you find your dog in the dark, especially in winter when the warm-blooded creature shines like a beacon...
A Model with two Sensors, doubling the resolution and giving you and aspect ratio of 16:8, is possible and might be available in the future. a trial run with a dual-sensor setup was succesful.
The device is currently powered by 3 AAA batteries, but newer prototypes work with 2 AAA batteries, making the unit smaller and lighter. The current revision uses BT 2.1, but the final device will be dual-mode BT with 4.0 support for future proofing and iPhone compatibility.
The Android App is currently pretty basic, offering Camera Overlay, framerates from 1-8Hz, Automatic or manual Temperature scales, Ironbow or RGB Color display and Screenshot capability.
I tested this with my Galaxy Nexus running Android 4.2.2 and it works quite well, a few bugs are still there, but they should be mostly solved by
the time this hits Google Play
So, let's look at some pictures:
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This is the current Prototype device, it's size and shape are far from final. The black thing next to it is the pouch for my Nexus. I attached the Sensor to my Nexus with a piece of Pugoo pad, this works really well.
This is my dog in TI vision. The resolution is no good enough for details. but still quite impressive for such a low-priced sensor.
This shows the real usefulness. You can clearly see how much warmth is radiated out through the old, double glazed wooden windows. The Yellow area does not quite match the windows area, this is due to the fact, that the sensor is not perfectly aligned with the Nexus camera. This should improve in newer revisions of the sensor and app.
This is a new and well insulated house, plastic windows with triple glazing. Windows, door and wall are mostly the same temperature.
Here you can see, that deven in a well insulated house there are warm and cold spots. This is the same door you saw above, but from the inside. To make the temperature differences visible I had to set the max and min temperatures by hand. Difference from warmest to coldest spot are minimal.
Last image for today: My dog at night with thermal overlay.
OK, this is just a start and a first impression. I'm planning to do more pictures, for example of the inside of my PC.
If you've got special wishes or questions, just ask and I'll try to answer.
Thanks for reading, I look forward to hearing your opinions and suggestions!

UPDATE:
I finally had some time to do a few more tests.
This shows that the CPU cooler is a lot...cooler than the VC chips next to the CPU socket.
This shot shows the GPU producing plenty of heat despite being idle
The "traditional" HDD gets a bit warm while the SSD keeps it's cool (hard to see on the picture, I know)
The temperature stays a lot cooler than the GPU and the VCs though...
And last but not least, here you can see that the case fan does it's job and blows the hot air out of the back of the case.
I hope you liked this little preview-review. Sadly there have been no responses so far, if anyone has questions, don't be shy to ask...

Thanks for the update!
See you having fun with the sensor.

Good work! I am currently trying to program my own interface with the MLX90620 but the 16Hz output doesn't look as good as yours - in fact, it's very noisy. Did you do some filtering or use a lower refresh-rate?
Also, how did you get the higher resolution? Interpolation?

@chnaideur:
I use 4Hz as a standard and 8Hz as a maximum at the moment.
The data is "noisy" because of the small temperature changes the sensor can detect.
In the last Android software I use a threshold between 0.5 to 1 degree Celsius to get a better picture.
Thus to filter out the noise.
The higher resolution is achieved by interpolation.

I remember following this project a ways back. Glad its came to fruition. Keep up the great work guys. Very interested in this.....STILL
Sent from my SCH-I605 using Tapatalk 2

availability?
This is a great add on device. Are there any updates on its development or availability?

vitamindee said:
This is a great add on device. Are there any updates on its development or availability?
Click to expand...
Click to collapse
Hi,
why don't you send a PM to mardaso, he has built several versions and is selling them in Europe. Last I heard he was working on a USB-OTG Version.
If you live in the US you could get one of the "IR-Blue" devices that were up on Kickstarter. They are made for iOS Devices, but there is a free app by mardaso on the Playstore that should work fine with them.

Any running apps that work with the heart rate sensor?

I can't find a single running app that will take heart rate while running with android wear. Am I missing something here? Anyone recommend any apps? On my Apple watch, I can run and have a constant heart rate displayed. Looking for something similar for android.
Thanks.

Endomondo

I just got an update to RunGPS which says that the update has a setting for continuous hr monitoring for android wear. When I go into settings sure enough there is new check box. I haven't been able to try it yet. Will let you know if it works.
---------- Post added at 03:24 PM ---------- Previous post was at 02:51 PM ----------
Well, RunGPS didn't improve things. Not that I really thought it would, it's a problem with the watch. It did read continuously, for 5 minutes, then if froze and just stayed there.

yeah, I actually called Huawei and asked them about this, and they said that if I was linking to an android phone instead of an iphone it would be able to do continuous. Apparently not. I joined this site hoping to find instructions for hacking it to be able to get continuous HR monitoring. I like having one device for all this, and since I pedal to work, use Strava and My Fitness Pal to track my fitness, I would like to have an HR monitor I don't have to fuss with. I can barely even get it to read my HR at all, since it never seems to have a good read, even pressed tight against my wrist.

pinkyracer said:
yeah, I actually called Huawei and asked them about this, and they said that if I was linking to an android phone instead of an iphone it would be able to do continuous. Apparently not. I joined this site hoping to find instructions for hacking it to be able to get continuous HR monitoring. I like having one device for all this, and since I pedal to work, use Strava and My Fitness Pal to track my fitness, I would like to have an HR monitor I don't have to fuss with. I can barely even get it to read my HR at all, since it never seems to have a good read, even pressed tight against my wrist.
Click to expand...
Click to collapse
I tried Heartrate OS but it stopped working and I tossed it for Cinch. (It's called Cinch Weight Loss and Fitness.) You can get Cinch to give you every five minutes but not continuous. To be honest, the battery on the Huatch can't handle continuous anyway. Drains it too fast.

kimtyson said:
I tried Heartrate OS but it stopped working and I tossed it for Cinch. (It's called Cinch Weight Loss and Fitness.) You can get Cinch to give you every five minutes but not continuous. To be honest, the battery on the Huatch can't handle continuous anyway. Drains it too fast.
Click to expand...
Click to collapse
Actually cinch has workout mode:
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One if the big problems with the readings is to get it tight enough. Mine which came with the leather band couldn't get really tight, but then I got a rubber band for workout and it's great ?
Sendt fra min SM-G920F med Tapatalk

nkolsen said:
Actually cinch has workout mode:
One if the big problems with the readings is to get it tight enough. Mine which came with the leather band couldn't get really tight, but then I got a rubber band for workout and it's great ?
Sendt fra min SM-G920F med Tapatalk
Click to expand...
Click to collapse
Sorry to burst your bubble....but HRM on Huawei watch is a gag....
Sent from my SM-G935T using Tapatalk

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!