I want to know is there any services that device by using it could find it's current location?
for example tags that show current location , using any international or local
services.
thanks for any guides.
Regards
Ali
I found some thing more ,GPS is satellite network that send positions as a signal
to earth and receiver should get signal from at least four satellite to calculate
their current position.it is free and every receiver could use it.
Related
I am new to development using GPS so any help will be most appreciated.
Project:- I am attempting to locate gps tracking hardware for a student project to locate animals.
I do not want to use cell phone SMS or yearly subscriptions packages as this is not practical where there a number of animals to be tracked. A solar powered device would be a bonus?
My understanding is the following will be required:
A GPS receiver (to get the gps location from satelites) - result is a 'navigation message'. This hardware device would be on the animal.
A transmitter with an antenna which will listen out for radio waves on set frequencies from the receivers, amplify them and its tuner will filter based on a particular frequency.
The 'navigation message' (or number of navigation messages) would be held on the the transmitter.
I am not sure if I can get an appropriate hardware transceiver with both the receiver and transmitter in 1 that can be attached to the animal?
The data would then to be sent over the internet from the transmitter to a web server via a HTTP request and parsed to be stored on the database.
A phone app / web app could then query the database to identify where the animal is at its last stored location or analyse data to determine its route over time when required.
If you have any advice / suggestions on the process above or advice on types of hardware / location of hardware to complete this project I would really appreciate it.
Polly, here are a few commercial solutions for GPS Animal Tracking. Some are rather expensive, but at least this shows what is out there professionally.
I think one of your primary issues here is battery power, size, and weight. GPS receivers use a fair bit of power when on, so it would have to be "off" but for a few seconds every-so-often, the rate determining how long the batteries will last. Solar recharging is an idea, but is that compatible with these particular animals?
If you wanted to construct something like this, there are a vast array of GPS modules to start with, depending on how integrated and customized you want to get with the idea. But these are receivers only - they will not broadcast anything. To get the GPS data remotely, you're going to need both a way to store the GPS data, and a transmitter (your #3) to send it to you. Since the transmitters would be small and low-power, this will limit the range you can receive them from. Not impossible, just a little more challenging.
Is a web developer available that can write that web and database code?
Is a phone developer available for the phone app?
Here are some interesting articles from others that have DIY their own low-budget trackers. I hope this gives you some ideas.
I am implementing a GeoFence related functionality where the app notifies when user enter / exit into certain location. Here my problem is, when I am using Location manager services it is taking using battery. Can anyone suggest me on how to get the current location updates using GPRS.
Or suggest me a better way.
Thanks.
Set the desiredAccuracy to 3000 and you can get a location using WiFi or cell tower triangulation only. That will reduce battery usage significantly by turning off the GPS.
I am working on a project that deals with GPS based tracking of vehicles. I want to know if we can use GPS data for real time tracking of vehicles in areas where there are no cellular services.
Yes you can, GPS works everywhere in the world, when you have free view to sky.
It does not work in tunnels, underground and indoors.
Without cellular service the phone needs some seconds more to get the first valid GPS position after enabling it.
The application will select a random latitude and longitude to create a point which the user must find.
The user's distance from the point will be displayed using a "hot-cold meter", which will change color depending on the distance. This meter must constantly update, which would require that I constantly retrieve the user's location. I would also need to use kCLLocationAccuracyBest. However, this sounds like it would use up a lot of battery.
Can I do anything to save battery?
From the official documentation
Gathering location data is a power-intensive operation. It involves powering up the onboard radios and querying the available cell towers, Wi-Fi hotspots, or GPS satellites, which can take several seconds. Leaving the standard location service running for extended periods can drain the device’s battery. (The significant-change location service drastically reduces battery drain by monitoring only cell tower changes, but the service works only on devices with cellular radios.) For most apps, it is usually sufficient to establish an initial position fix and then acquire updates only periodically after that. If you are sure you need regular position updates, you should use the significant-change location service where you can; otherwise, you should configure the parameters of the standard location service in a way that minimizes its impact on battery life.
http://developer.apple.com/library/ios/#documentation/userexperience/conceptual/LocationAwarenessPG/CoreLocation/CoreLocation.html
PS: On the same link there's a section at the bottom of the page with other tips too :)
My iphone app runs 8 hours of recording fixes evey second on iphone4. The display needs much more power. Dont worry. Measure how long you can record. Then claim, not before.
I am looking for information on sending GPS coordinates from a GPS module to a server. How would I go about doing this?
I have done countless google searches on the subject and all searches fail to reveal any information on how the data generated from the GPS unit might be actually sent from the gps module to a server.
There are obvious ways to do this using a GSM deivce, but I can't find any information on low cost data plans, networks, etc
All I would need to do is occasionally send the GPS coordinates from the module to a server. This would be done several times a day. One device would probably have bandwidth of a couple KB per month, that's it. What options are out there?
you need:
A GSM modem that support whatever frequencies / technology your intended cellular provider uses. Bunch of examples here: http://www.sparkfun.com/categories/66 Make sure the module manages the TCP/IP aspects and has an easy interface (AT commands).
A data only account with that cell provider for each device. 200MB a month is like $15-20 from most carriers in the US
The GPS Module. Examples here: http://www.sparkfun.com/categories/4
A microcontroller to manage the GPS and the cell modem. Arduino is probably the easiest one to get started with.
All GPS receiver modules output serial NMEA data. Which is fairly simple to parse, and from there you can do whatever you like with it, store it send it, plot it, etc.