Develop Bugs

Best GPS

What is the best GPS for Universal / XDA EXEC / Jasjar ?
Best deal ?
Thanks.

Fantastic Holux GPSlim236
I made the jump to a new GPS mouse, as I was tired of waiting up to 10 mins for acquiring a signal. With this new one I can have it in my pocket and be in a restaurant and still get a signal....it's just amazing. The Holux GPSlim236 Wireless GPS Receiver has a SiRF-Star-III high sensitivity chipset built-in, which makes it work so well. I have yet to experience signal acquisition taking longer than 60 seconds. Usually it's around 10 to 15 secs.
Works flawlessly with my MDA Pro (QTEK 9000 software) and Navigon 5.
Specification:
‧Tracks up to 20 satellites
‧Receiver: L1, C/A code
‧Update rate: 1 HZ
‧Antenna Type: Built in Patch Antenna
‧Minimum signal tracked: -159dBm
‧Dimension: 46.3 × 67 × 19 mm
‧Weight : < 56g
‧On/Off switch : Slide Switcher
‧Operation Temperature: -10 ℃ to + 60 ℃
‧Store Temperature: -20 ℃ to + 85 ℃
‧Operation Humidity:5% to 95% No condensing
Position Accuracy
◆ Non DGPS (Differential GPS)：
‧Position : 5 - 25 m CEP without SA
‧Velocity : 0.1m / sec
‧Time : 1 μsec sync GPS time
Acquisition Time
‧Reacquisition 0.1 sec. averaged
‧Hot Start 8 sec. averaged
‧Warm Start 38 sec. averaged
‧Cold Start 42 sec. averaged
Protocol & Interface
◆ Compatible with Bluetooth devices with Serial Port Profile (SPP)
‧Bluetooth™ version 1.1 compliant
‧Bluetooth™ Class 2 operation (up to 10 meter range)
‧Frequency : 2.400 to 2.480 GHz
‧Modulation: FHSS / GFSK
‧RF channels: 79
◆NMEA Protocol Output : V 2.2 (optional V3.0)
Baud Rate : 38400 bps
Data Bit : 8
Parity : N
Stop Bit : 1
Format:GGA, GSA, GSV, RMC, VTG
Optional : GGL, SiRF Binary
Dynamic Conditions
‧Altitude : 18,000 m ( 60,000 feet ) max
‧Velocity : 515 m/sec ( 700 knots ) max
‧Acceleration : 4G
‧Jerk : 20 m/sec, max
LED Function
Bluetooth , Navigation Update and Battery / changer status Indication

Hi LinuxGeek,
I recently bought a 'inter-active information' BT GPS off eBay and it works a treat with both my M5000 and Symbian 60 mobile. In reality all GPS are much the same. You only need a 12 channel receiver for SatNav etc as only 3 sats are needed for 2D nav and 4 sats for 3D nav but 8 sats will give you a good accurate fix so don't be tempted to get a 32 channel receiver. I've been recommended to get a GPS receiver with RFMD or SRIF III chipsets due to the cold & warm aquisition times.
Hope this helps...
Gavin.

That is incorrect. They are not 'all the same' although most SSIII receivers offer sim ilar excellent performance.
If at all possible, choose a SirFStarIII (SSIII) receiver.

I have a very commun GPS named, socket BT GPS, I bougth in Expansys (Spain) almost a year ago. The price, 113,00 €. It is the first global standard for short-range wireless communication. Bluetooth also provides low power, standardized connections between a wide range of consumer, enterprise, and industrial devices. The Socket GPS receiver will track up to 16 satellites and provide position accuracy down to 2.5 meters and with the removable, rechargeable battery provides up to 9 hours of continuous use.
This is the link: http://www.socketcom.com/product/GP0820-521.asp

The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...

gazela00 said:
The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...
Click to expand...
Click to collapse
They 'ALL' work in aeroplanes! Don't make claims about things that you know nowt about!

gazela00 said:
The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...
Click to expand...
Click to collapse
Ehhh......where on earth do you get the deep water info from? Garmin states: "submersible in one meter of water for up to 30 mins". They also mention "Waterproof — so it can be mounted outside the car for a clear view of the sky". I find the Holux quite amazing, it even keeps a signal captured when I put it in the stowaway area located behind the handbrake, in-between the two front seats! No outside mounting required here ;-)

griffog said:
gazela00 said:
The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...
Click to expand...
Click to collapse
They 'ALL' work in aeroplanes! Don't make claims about things that you know nowt about!
Click to expand...
Click to collapse
Yes, they all work in aeroplanes....near a window...till 400-500 km/h... But at 900-100Km/h in a comercial airplane how many work? Have you tried? or is just theory? I´ve tried MANY "cheap" gps receivers (ex. Holux 230...) and work till 400-500Km/ my friend... Read the complete specifications and give a try...it´s the best way to achieve acknolege...
It's the same underwater. I use My garmin GPS10 till 25 meters in deep water without capsule... I´ve logs from my underwater computer...So, give it a try

gazela00 said:
Yes, they all work in aeroplanes....near a window...till 400-500 km/h... But at 900-100Km/h in a comercial airplane how many work? Have you tried? or is just theory?
Click to expand...
Click to collapse
Yes I have tried! All consumer GPS are limited to 1000Kts and 60,000ft altitude. I don't know of any commercial aircraft that fly above those limits!
It's the same underwater. I use My garmin GPS10 till 25 meters in deep water without capsule... I´ve logs from my underwater computer...So, give it a try
Click to expand...
Click to collapse
I also find that claim impossible to believe. The high frequency signals will not propagate through a few mm's of water let alone 25m! Are you using a surface antenna?

fslunatic:
I bought the same GPS device, but my Exec is not able to identify it.
I would appreciate it if you could you tell me if you made any changes to the registry and which COM port are you using (in fact it would be execellent if you could list all of the setup details); Or could you please reffer me to the relevant forum pages.
Thanks

gazela00 said:
griffog said:
gazela00 said:
The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...
Click to expand...
Click to collapse
They 'ALL' work in aeroplanes! Don't make claims about things that you know nowt about!
Click to expand...
Click to collapse
Yes, they all work in aeroplanes....near a window...till 400-500 km/h... But at 900-100Km/h in a comercial airplane how many work? Have you tried? or is just theory? I´ve tried MANY "cheap" gps receivers (ex. Holux 230...) and work till 400-500Km/ my friend... Read the complete specifications and give a try...it´s the best way to achieve acknolege...
It's the same underwater. I use My garmin GPS10 till 25 meters in deep water without capsule... I´ve logs from my underwater computer...So, give it a try
Click to expand...
Click to collapse
Did you read the posts before yours?
You have the full specs for hollux gpslim 236 where it states clearly 700 knots do you know how many 700 knots is? You're right it's 1300 km/h

Hi techDot,
I didn't do anything unusual really. I switched on the GPS device and then activated Bluetooth on my MDA-Pro. I then let the MDA-Proi look for Bluetooth devices. It found the GPS and then I set up a standard partnership....it took less than 2 mins.
I believe I am using COM0. What navigation software are you using? What particular steps are you going through?
I didn't touch the registry or anything....all very straight forward. Hope we can help you and get it working.
techDot said:
fslunatic:
I bought the same GPS device, but my Exec is not able to identify it.
I would appreciate it if you could you tell me if you made any changes to the registry and which COM port are you using (in fact it would be execellent if you could list all of the setup details); Or could you please reffer me to the relevant forum pages.
Thanks
Click to expand...
Click to collapse

<<Did you read the posts before yours?
You have the full specs for hollux gpslim 236 where it states clearly 700 knots do you know how many 700 knots is? You're right it's 1300 km/h>>
LOL! Hehe......

Assuming i were to by the one suggested by fslunatic, what would be the best navigation software? i don't know a great deal about this subject. I have been looking at the tomtom software but, a) can't find somewhere that just sells the software / maps and b) find anywhere that says it is compatible with the HTC universal (XDA Exec in my case) windows mobile 5 software.
Anyone shed any light?
P.S. How much did you pay for yours fslunatic?

I use an O2 Exec with TomTom 5 and it works superbly.

Excellent did you manage to just by the software from somewhere or did you buy the 'tomtom kit' they mention on the website that includes the GPS unit and all? i'd rather by the GPS unit mentioned by fslunatic and buy tomtom software separately, assuming it's all compatible of course (anyone know?).

gratz: Try looking here: http://www.tomtom.com/products/product.php?ID=109&Language=1
EDIT: Doh! They don't sell it on their website! Try here: http://www.pdamods.com/proddetail.asp?prod=X1TTSOFT for UK on an SD card or here: http://www.pdamods.com/proddetail.asp?prod=X2TTSOFT for the rest of Europe.

£120, just for the software? That's ridiculous :shock:

ncruz said:
gazela00 said:
griffog said:
gazela00 said:
The best is Garmin GPS10. Very tiny, magnetic support inside and woks fabulous, till 5 meters in deep water and is the only one that works inside a airplane, because measures velocity till 1280 Km/h. The others when the plane reachs 400-500 Km/h stop sync....It´s not cheap, but is the best...
Click to expand...
Click to collapse
They 'ALL' work in aeroplanes! Don't make claims about things that you know nowt about!
Click to expand...
Click to collapse
Yes, they all work in aeroplanes....near a window...till 400-500 km/h... But at 900-100Km/h in a comercial airplane how many work? Have you tried? or is just theory? I´ve tried MANY "cheap" gps receivers (ex. Holux 230...) and work till 400-500Km/ my friend... Read the complete specifications and give a try...it´s the best way to achieve acknolege...
It's the same underwater. I use My garmin GPS10 till 25 meters in deep water without capsule... I´ve logs from my underwater computer...So, give it a try
Click to expand...
Click to collapse
Did you read the posts before yours?
You have the full specs for hollux gpslim 236 where it states clearly 700 knots do you know how many 700 knots is? You're right it's 1300 km/h
Click to expand...
Click to collapse
Do you guys all have your own planes? It's just that I've never had the need for Sat Nav on a commercial plane before. I find they rarely take a wrong turn ("At the next fluffy cloud, turn left") and no matter how many times I enter my post code they always take me to a flippin airport! :wink: :lol:
On a serious note, is there a plug and play packege that needs no clever programming or other jiggery-pokery to get working?
Thanks,
Dunc

GPS psoition not exactly 25 to 50m difference

Hello,
my gps has no right position i think the difference is between 25 to 50 m
Is there a tool to correct this issue ?
Thx
Nochmal in deutsch falls mein Englisch nicht so gut zu verstehen ist
Mein GPS im Artemis hinkt etwa 25 bis 50 m hinterher was sehr nervig ist
Kennt jemand dieses Problem und weiß wie man Abhilfe schafft ?

From what I recall no civilian GPS is precisely correct.
Only Military GPS is precise to the metre.
Not sure what the exact varience is though.
Regards

i have navigation systems before the p3300 and on all when the street cross comes it brings exactly the position when it says turn left at 50m then it was correct, i believe the military difference is only 1m or lower not 50m ???
For external PC gps receiver there is a software for correct some options for the inbuild gps.
I have no glue for a in built gps.
Sorry for the English this not my normal language, i hope you can understand what i mean thanks

Also, better accuracy depends on the number of satellite signals the device can get. Signal strength is weaker in the urban areas.

What software application are you using when you notice the discrepancy? I have found my Artemis GPS position to be equal to some of my other units. For example using a topographical map when out walking the unit is very good, certainly not 25 to 50 M out. It could be low signal strength and reflections off other building that is causing a problem (if in built up area)
One other consideration, how many other applications do you have running at the same time as your Nav software, your device might be struggling under load, check settings/ system tab Memory icon/ running programs and stop all before trying the nav software Mike

My device, which is still the Magician is running the ROM 1.13 with BS. Additional software which are all installed in the Storage are; Pocket Informant, Photo Contacts Pro, Resco Suit, SK Tools, TT6, WorldMate Pro, Ring tones. All TT maps (WEU, USA+Canada), voices, schemes, zip codes, POIs and IE Temporaty files are installed in a 2GB SD. What's left in available memory are Storage = 0.7 of 26.72 MB, Storage Card = 105 MB of 1935GB.
The programs that are running (being memory resident) while TT6 is active are Photo Contacts Pro and Pocket Informant. I have BT on all the time since I use a BT headset for calls while driving. TT audio is via my Seidio active car holder.

The programm ist TT6 and only jetware, and ilauncher active nothing more, the area is no big city good sight to the air.
I checkt this with tt5 and a hp2210 with bluetooth sirfIII this combination is near perfect

I've never used those programs. The inaccuracy might come from any of the two.

Civilian GPS is officially (from the provider of the GPS System - US Forces) something about 10 metres unexact. Of course this number can be smaller if you have more satelites "in sight" However, GPS Navigation Programs do not need accurate positions, they calculate the position on the map with old data and then extrapolate it, showing the dot where you should be now, according to your speed and heading 1 second or two seconds ago. Of course it can control its calculation because more data streams in. It is funny to see Navigationsoftware Confused, when you ride a train. It gets a signal in a certain direction, with a certain speed, so it puts the dot on the street next to the Rails, because this is the only logical position where your car can be so it says "turn left now" but the train goes straight. Then it searches another street you could be on. just funny
But in short: GPS Software compensates missing GPS accuracy, mostly well, sometimes not so good. Try using another Software or newer map ,maybe that will fix the problem. On my MDA Compact III The Built in Receiver works just great together with TT6. Maybe there is a way to shorten the interval between two data sets. That would give the Software more information, resulting in a more accurate position. But i don't know if a program like GPS Maus can manipulate Built-In receivers that easy.
I once reprogrammed a T-Mobile Receiver with this program, so it received also NMEA data and the intervall between two data sets could be set randomly.

In the UK, the BBC send out a spoiling signal which reduces the accuracy of the GPS. It is also sent out from National stations in other Countries. I heard it was sent out with the atomic clock signal. This is to stop "undesirables" buying civilian GPS units and fitting them to military equipment and sending something directly to your letterbox - the same way a US military GPS unit can if they want to! You used to be able to buy a box that would correct the error signal, but that got stopped ages ago.
The GPS also becomes slightly more inaccurate depending on the speed you are travelling, travel under 30 mph / 50 kph and the "you have arrived" will be within a few yards/metres of the real arrival point. Travel at 70 mph / 120 kph and the "take the exit in 200 metres" is very inaccurate - maybe by a couple of hundred metres - you can work out why!
Also GPS signals are "secondary" and can be turned off at any time in the event of a military requirement - which is why you can use the signals free of charge.
Jeff

jthspace said:
In the UK, the BBC send out a spoiling signal which reduces the accuracy of the GPS. It is also sent out from National stations in other Countries. I heard it was sent out with the atomic clock signal.
Click to expand...
Click to collapse
Where did you get this gem of knowledge from?
jthspace said:
This is to stop "undesirables" buying civilian GPS units and fitting them to military equipment and sending something directly to your letterbox - the same way a US military GPS unit can if they want to! You used to be able to buy a box that would correct the error signal, but that got stopped ages ago.
Click to expand...
Click to collapse
Are you confusing the selective availability that was used to degrade the GPS accuracy up to a few years ago? - The US reserve the right to switch it back on again should they need to, but under normal conditions the signal is not de-graded any longer. If you want to send something to a letterbox the Post Office offer quite a good service
jthspace said:
The GPS also becomes slightly more inaccurate depending on the speed you are travelling, travel under 30 mph / 50 kph and the "you have arrived" will be within a few yards/metres of the real arrival point. Travel at 70 mph / 120 kph and the "take the exit in 200 metres" is very inaccurate - maybe by a couple of hundred metres - you can work out why!
Click to expand...
Click to collapse
The issue of position inaccuracy relative to speed won't give a major difference to position - the software maybe responsible for the apparent degradation though.
jthspace said:
Also GPS signals are "secondary" and can be turned off at any time in the event of a military requirement - which is why you can use the signals free of charge.
Click to expand...
Click to collapse
As I mentioned before the US reserve the right to turn on the Selective availability (positional accuracy degradation), if they turn it off their own planes and other civ/ mil products would be useless - Mike

mikealder said:
Where did you get this gem of knowledge from?
Click to expand...
Click to collapse
When I worked on the original GPS launches a while back
Jeff

Static Navigation in Artemis
In Artemis is a Sirf-III-Chipset. One of the "features" of this chipset is a Parameter called "Static navigation".
This gives a more or less "static" position if the device is moving rather slow, like a pedestrian does.
Useful for car navigation because your car is not "dancing in front of the traffic light".
But it gives a more or less not accurate position when standing or moving rather slow. You need to move with 5 Km/h at least.
No tool for switching off "Static Navigation" in Artemis seems to be working.

BBC jamming the gps signal..?
Selective Availability:
"SA works, for the most part, by intentionally dithering the clocks in the 24 satellites that make up the GPS system. The clocks are steered by an algorithm, known to the control station and military receivers and transmitted in encrypted code over the satellite signals."
http://www.exn.ca/FlightDeck/News/story.cfm?ID=20000502-53

The BBC does what??? I don't believe that for a moment!
The GPS signal I get on my Orbit and previously on my Fortuna Clipon has been extremely accurate, using different software Tomtom 5 & 6, pocket streets and Vito all have been down to a couple of meters at most.
I have also used in the US, Cyprus and Spain all with the same accurate results.
Yes the US can turn off civilian GPS if they wish, which is why the EU is building Galileo.

duh... SA has been switch off 7 years ago!
interesting to see people still talking about SA, it has been switch off since year 2000!
http://www.ngs.noaa.gov/FGCS/info/sans_SA/

Bicycle Cadence sensor based on audio recording

The idea is to create a very low cost app and sensor to monitor the cadence of a bicycle. Since most of app can find the speed through GPS, I need one that count how many RPM I'm doing.
1. I don't know how to program android app or even which language I should use
2. The idea consists on adapting one magnet on the crank and the other on the bike frame near to the crank course
3. When the magnet on the crank goes through the other one on the bike frame it should create a small current
4. This magnet would be wired to the android based cellphone (perhaps a Galaxy Nexus) on the audio port
5. The small current should generate a sound
6. This sound should be intepreted as one full cycle
7. The software must count and store how many cycles per minute I'm doing
How could one do this?

distance / circumference = rotations
It sounds like you already have distance traveled from the GPS record.
If you can measure your tires, πd (or 2πr) will give you the circumference, and distance/circumference will give you number of rotations, no additional hardware required.
marcoskp said:
The idea is to create a very low cost app and sensor to monitor the cadence of a bicycle. Since most of app can find the speed through GPS, I need one that count how many RPM I'm doing.
1. I don't know how to program android app or even which language I should use
2. The idea consists on adapting one magnet on the crank and the other on the bike frame near to the crank course
3. When the magnet on the crank goes through the other one on the bike frame it should create a small current
4. This magnet would be wired to the android based cellphone (perhaps a Galaxy Nexus) on the audio port
5. The small current should generate a sound
6. This sound should be intepreted as one full cycle
7. The software must count and store how many cycles per minute I'm doing
How could one do this?
Click to expand...
Click to collapse

As I understand marcoskp, he want to monitor cadence ( rate per minute of crank not wheel).
In this case you should have information of current transfer also if you want to use speed from GPS to calculate.
But you can have situation when crank is stable and you are still moving.
So external sensor is necessary.
Using audio port is very good and easy solution, but cause of wireing, have you consider BT sensor?
It should work same but instead connecting it to audio port you create switchable transistor and count full circles (simple counter) as a rising slope. And those information will be sent via Bluetooth (counter value).
It will be only little more expensive ( BT module here is only one with real cost, and it's quite cheap ) but much easier to mount.

Thanks saffron82. More than that, bikes works with differents gear ratio. Some are fixed, but today people uses 21 to 30 speeds (or 20 if you are using sram's 2x10). So cadence may change a lot if you are using a bigger or smaller ratio. The idea behind audio port is also to consume less energy. But I may be wrong. Perhaps bt consumes less energy.
saffron82 said:
As I understand marcoskp, he want to monitor cadence ( rate per minute of crank not wheel).
In this case you should have information of current transfer also if you want to use speed from GPS to calculate.
But you can have situation when crank is stable and you are still moving.
So external sensor is necessary.
Using audio port is very good and easy solution, but cause of wireing, have you consider BT sensor?
It should work same but instead connecting it to audio port you create switchable transistor and count full circles (simple counter) as a rising slope. And those information will be sent via Bluetooth (counter value).
It will be only little more expensive ( BT module here is only one with real cost, and it's quite cheap ) but much easier to mount.
Click to expand...
Click to collapse

Real World BlueTooth Range Active 2

Curious as to what others are seeing in the real world:
How far away can your Galaxy Active 2 Watch be from your phone?
The Active 2 has BlueTooth v5, which has a theoretical distance of 800 feet, or four times as far as v4.2. Of course, that's theoretical and clear line-of-sight.
The range I'm seeing is a bit disappointing.. I have a Galaxy Note 9 which also has BlueTooth v5. so I was hoping to see more range.
For example, if my phone is left on the third floor of a traditional residential home, and I go to the first floor, the watch often disconnects from the phone. That's only about 20-30 feet away. There are two floors (carpeted and wood) between the two, which of course cuts down on the reception. But still, seems like you should be able to have more distance between the two.

JohnNadeau said:
Curious as to what others are seeing in the real world:
How far away can your Galaxy Active 2 Watch be from your phone?
The Active 2 has BlueTooth v5, which has a theoretical distance of 800 feet, or four times as far as v4.2. Of course, that's theoretical and clear line-of-sight.
The range I'm seeing is a bit disappointing.. I have a Galaxy Note 9 which also has BlueTooth v5. so I was hoping to see more range.
For example, if my phone is left on the third floor of a traditional residential home, and I go to the first floor, the watch often disconnects from the phone. That's only about 20-30 feet away. There are two floors (carpeted and wood) between the two, which of course cuts down on the reception. But still, seems like you should be able to have more distance between the two.
Click to expand...
Click to collapse
My experience is the same as yours - two rooms away in my house is the limit. Obviously a bit more would be nice but not sure that is too bad really.
S

Samer distance here: max 30 ft.. But it must be in the phone
I test my Galaxy buds and they have the same problem. (note 10+)
At exactly the same distance of the phone they both give problems. it is a relatively small distance, but I can live with it.
Maybe Samsung cuts off the real power of Bluetooth to save battery?
Huib

GT2 Pro - steps vs calories

Not sure if it's because it's currently paired to a Note 20 Ultra or if it's a setting I can't find, but although the steps seem OK, the calories burned and the distance walked seem to be about double what I would expect.
For example on the main Health page, at the top, it says I've got 9983 steps, which is about right, but it also says 794 calories and 12.43 miles??
If I go into devices and just look at the watch results, I get the same steps, and 394 calories and 4.27 miles - these sound about right.
Any thoughts appreciated. But maybe all will be well if my Huawei watch from China ever arrives
EDIT: A bit more reading suggests you get around 50 calories for every 1,000 steps - so one is miles over and one is under!
Anybody else having an issue?

Nobody having any issues with the GT2 pro then? Must be the Note 20 Ultra.

stewarta13wsb said:
Nobody having any issues with the GT2 pro then? Must be the Note 20 Ultra.
Click to expand...
Click to collapse
Not that nobody having that issue, it's more nobody is paying attention to that. The other day I was doing heavy weight lifting 10 minuts in total. As Huwei Health calculated I burned exactly 2 calories It's the other way around with steps count. Way off...around 2x more. Both my and my wife's watch. So it gives...yes there are issues.
People are more interested with fancy watch faces, not so much if data presented to them are real. Only my two cents
EDIT: And BTW...pretty sure nothing wrong with yours Note 20 Ultra