I'm developing an android application using BLE. I've implemented all the basic operations like discovery, connection, and data transfer.
Now I was looking for BLE notifications, Is it possible to receive notification from BLE device when the application is not running (not even in background).
What I want to implement is the notification similar to GCM/FCM, we receive notifications in our app even though app is not running.
So want to check if similar notification mechanism is supported by BLE devices and Android framework.
I've searched for few hours now but didn't get any proper result.
If anyone can just tell me if it is supported or not?
Now I was looking for BLE notifications, Is is possible to receive notification from BLE device when the application is not running (not even in background).
BLE is just a communication protocol. When someone talks, someone has to listen.
What I want to implement is the notification similar to GCM/FCM, we receive notifications in our app even though app is not running. So want to check if similar notification mechanism is supported by BLE devices and Android framework.
GCM/FCM works because Google Play Services is running on the device listening for messages.
I can imagine two possible cases based on your question:
If by "receive notification" you mean a change in a Bluetooth characteristic - well your app should be running already. Only you know how to talk to the BLE device.
If you want to implement a location aware beacon type behavior with BLE you may be able to leverage the existing Google Nearby feature to achieve the desired effect.
I would say no. You need to have the app running to get Bluetooth callbacks. You should simply set up a Foreground Service in your process and that will keep the app running in the background.
If you want to receive notification event if your app is not running, you should implement Android service that continuously scan for BLE frames and ones it catch some frame that is met some parameters (for example for iBeacon it will be specific Major and Minor values; for Eddystone URL -- some specific URL etc.) -- just send intend to start your application.
Related
I'm trying to understand how even the chinese smartwatches retrives the notifications that I receive on my iPhone, even without any dedicated app installed, all via bluetooth.
My goal is to use a BLE module (like an esp32 or so), connect it to my iPhone like if it is a smartwatch, and receive something on BLE when I receive a notification on my phone.
How it works, or how this "function" is called, so I can do I research online.. at the moment I did not find anything.
thanks in advance
I'm building an iOS and Android application and want a user to get notified when he'll be in the proximity of a Beacon. I am looking to understand the following cases whether the user will be able to receive the notification:
If the application is in the background and the user has come into the proximity of a Beacon, will it allow the application to send him a local notification?
If the application is in the killed state and the user has come into the proximity of a Beacon, will it allow the application to send him a local notification?
Which Beacon will be best for my use case?
any help here will be appreciated.
1. Yes
2. Yes
If an application is killed, you have to make sure that on Android you run a background service that listens for beacon proximity and make sure it does not get killed by the system. On iOS side you should setup background beacon scanning with Bluetooth LE accessories usage turned on in "Compatibilities" which will not get killed by system if setup correctly.
If your Bluetooth device is NOT a Beacon and just streams some advertisement data over the air, then on Android side you should be able to setup background Bluetooth scanner, while on iOS it will not be possible to do such a thing if a Bluetooth device is not connectable (even with connectable device it will be hard).
Those services could launch local notification when beacon enters required range.
3. Any
Answers are valid if Android and iOS applications are setup correctly and Beacons are TRUE beacons and not a random Bluetooth devices that stream advertisment data.
Good luck :)
All Running apps receive the sensors data through BLE.
it means that the sensor connects directly to the 3rd app and i can't collect any statistics of sensor use.
Here are my questions:
Do you have an idea for a solution for it? How I can collect statistics?
Can I build an app that receives the data from the sensor and communicates with the running apps through BLE, both my app and running app on the same mobile device?
In simple words, can the running app receives BLE transmission from another app in same device?
It's pretty unclear what your goal really is, but anyway from a technical point of view here is how it works:
In both Android and iOS, multiple apps can be connected to the same peripheral. But if one app issues a GATT request, the response will be delivered to only that app. Both apps can also register for notifications/indications. When a notification/indication is received, it is sent to all apps that are registered for notifications/indications. There is no way for the peripheral to know which app a GATT request comes from since they all appear to be sent from the same client.
I'm currently working on an application that would communicate with a hardware device which will notify user when receiving any incoming push notifications from any apps, such as Facebook, Twitter, Messages. I have done the Android version already, However, I'm not sure if it is possible in iOS.
Ok, I found out that there's a way to work on this. Apple actually provides a service called Apple Notification Center Service (ANCS) to communicate with BLE devices for all notification data. This is probably used by device like Pebble smart watch as well.
For what I know, it is not possible. iOS apps are sandboxing.
I am aware if it is possible to wake up an app when the user is close it a beacon. It know it is possible to do it on iOS. I have not found a clear solution on the web. Do you know if it is possible?
Yes, it is possible with the open source Android Beacon Library. It works by starting a low-power background beacon scanning service for your app when the phone boots, or when it is connected/disconnected from power.
Details about how you set this up, how it works, and its limitations are available here.