IoT-MicroLocation | Internet of Things project for Microlocation | iOS library
kandi X-RAY | IoT-MicroLocation Summary
kandi X-RAY | IoT-MicroLocation Summary
The Microlocation system utilizes Bluetooth Low Energy (BLE) technology of iBeacons to locate a user. Multiple beacons are placed in a room and based on trilateration algorithms the user's mobile device can be located. The iBeacon packets broadcasted have the essential data of each beacon such as UUID, Proximity, RSSI, Major and Minor numbers embedded into the payload of each packet. The iPhone receives this data and through HTTP POSTs the mobile device puts this data into a JSON object and sends it to a server whether it be local (Apache Tomcat) or in the cloud (Bluemix). The server is where the power house is where it processes the data coming through and based on RSSI values from multiple beacons coming in it will trilaterate the user's position and then run a particle filtering algorithm to make it more accurate. Once the user is located the server will reply back in the form of a JSON Response Object and the iPhone will do a iBeacon packet inspection to find the x and y coordinates that the server has calculated for the user's location. The iPhone plots this onto the map of the room and the user therefore will know where they are located. Now knowing the location of the user, the server simultaneously sends a signal to a MySQL database indicating that the user is nearby a device. The Raspberry Pi polls the MySQL Database for the things that it knows about constantly until something changes in the database. Once a change has been made (i.e. a user is near or far from a device) the device state changes and turns on or off.
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Top functions reviewed by kandi - BETA
- Handles HttpPost request
- Returns the distance from x to x
- Move the particles at a given position
- Senses the distance of a particle
- Handle Http POST request
- Init Kalman 2
- Initialize Kalman1
- Initialization of Kalman 1
- Get connection
- Initialize the input
- Authenticate a Beacon Cloud Beacon
- Starts the login button
- Returns the average part of the detector
- Process a POST request
- Returns the distance to x
- Initialize the text view
- Start the Beacon service
- Initializes the surface
- On touch event
- Called when a beacon is connected
- Load the beacon data
- On item click
- Handle POST
- Performs an HTTP POST request
- Creates the activity view
- Initialization of Kalman1
IoT-MicroLocation Key Features
IoT-MicroLocation Examples and Code Snippets
Community Discussions
Trending Discussions on Mobile
QUESTION
so I'am trying to learn dart and flutter and everything went well so far. But now I'am stuck at an error which I cannot handle. I coded a function which is supposed to asynchronously return the actual BTC price from https://blockchain.info/ticker.
Only thing it returns is errors:
...ANSWER
Answered 2022-Mar-29 at 00:29To get rid of that error you need to use the bang operator to tell the compiler that snapshot.data
won't be null.
QUESTION
ANSWER
Answered 2022-Mar-19 at 06:15My suggestion is to use ion-footer.
QUESTION
Very new to react native and javascript... I am trying to call a function and it doesn't seem to do anything.
Here is the fragment of code where the function is called:
...ANSWER
Answered 2022-Feb-24 at 16:20You need to start your component with a capital letter:
Note: Always start component names with a capital letter.
so change renderButtons to RenderButtons
QUESTION
What I'm trying to do is make a counter in Flutter which will be in this shape:
I'm fairly new regarding flutter and dart so I have tried to put this element inside of a Card but yeah I faced some issues due to overflow and it would be great if someone could give me a hint or point me to the right direction.
Here is my code for counter:
...ANSWER
Answered 2022-Feb-09 at 20:19Create a container and add decoration to it. Then inside the container use a row widget. In row use Iconbutton and text .
QUESTION
I'm building an app where I have a page which gives information about a specific trading card. I want the page to be scrollable, but I also want to have a grid on the page, with each grid cell showing one data point. I made the grid using GridView.count().
My problem is that instead of have a page which I can scroll through, the top half of the page stays static, while the grid is scrollable. How do I make the grid static, while the rest of the page scrollable? I intend to have more data below this grid as well, and I want to user to be able to scroll to see all of it, with the grid being a static component of the page.
Here's my code:
...ANSWER
Answered 2022-Feb-06 at 09:47You can provide physics: NeverScrollableScrollPhysics()
on GridView
to disable scroll effect. If you want scrollable as secondary widget use primary: false,
To have Full Page scrollable, you can use body:SingleChildScrollView(..)
or better using body:CustomScrollView(..)
QUESTION
I am posting this question to help future readers. After upgrading to Flutter 2.8
I suddenly got this error when trying to run my app:
ANSWER
Answered 2021-Dec-26 at 14:20Turns out this error was caused by a popular library I used (settings_ui
) that does not work with this version of Flutter (settings_ui: ^1.0.0
).
For future readers: Use a later version of this package. There is currently an open issue on github that addresses this.
Update 2022: Dev on settings_ui seems to have gone AWOL and no longer merging PR's the community has forked this project to: https://pub.dev/packages/flutter_settings_ui and here updates are properly merged and a fix has been released in version 1.0.1
For people facing this issue now:
As a monkey patch you can follow the steps in the GitHub issue and edit the package files locally:
In cupertino_settings_item.dart
change final ListTileTheme tileTheme = ListTileTheme.of(context);
to final tileTheme = ListTileTheme.of(context);
And change _iconColor(ThemeData theme, ListTileTheme tileTheme)
to _iconColor(ThemeData theme, ListTileThemeData tileTheme)
.
QUESTION
I use this code to scroll:
...ANSWER
Answered 2021-Oct-26 at 05:16what i did, use a listView and reverse true and in children use the list of map.reversed, i am giving you my code example below.
QUESTION
I am fairly new to the Firemonkey framework after working with VCL for many years so hopefully this question is not too simple.
I am listing Dynamic Listview Items which I update from a database. I have created the position/layout of the text within the Listview Item using design mode . My question is when I change screen orientation from portrait to landscape do I have to manually change the 'X' position of the text items located within my listview and their width so that the full landscape width of the screen is utilized? There appears to be no anchors for dynamically created Listview items. (The text items just have their generic names for the time being.)
I have a pic below of what I am trying to describe. First pic shows deign mode in portrait and second in landscape.
Any suggestions greatly appreciated.
...ANSWER
Answered 2021-Dec-22 at 23:30The Accessory
, Detail
and Text
items have an Align
property that can take values Center
, Leading
or Trailing
. They are recalculated and adjust their position with changes in the screen orientation.
Additionally some items have a separate property, TextAlign
, which sets the position for a text within the space of the Align
result.
QUESTION
I used this flutter package to implement a color picker in my app. My Widget
looks something like this:
ANSWER
Answered 2021-Dec-19 at 00:02please check out this and you need to palette type as paletteType: PaletteType.hueWheel,
. use the same package as used.
QUESTION
I have a mobile application developed using Ionic. Now I want to redevelop it in flutter and publish a new update, would that be possible? will google play and AppStore allow that?
...ANSWER
Answered 2021-Dec-17 at 19:07There is no constraint on development language. But,
- You need to use same certificates/keys for iOS App
- You need to use same key-store/keys for Android App
- If you are using local database or file storage, then you should follow the same path in your newly created app as well. If you are using any third-party library to manage the db or file paths, then it may be in different location altogether. (This one actually happened to me. When I migrated my app from a cross-platform framework to Native the database path got changed in release version)
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install IoT-MicroLocation
You can use IoT-MicroLocation like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the IoT-MicroLocation component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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