Very well done. Trying to follow the Android developer examples are very confusing due to the code being split across many classes. The examples you provided are well organized and easy to follow. The state machine that is used to register different gatt notifications was huge. I was having a hard time getting more than one gatt notification to work. Thank you for posting this.
@27:30 and since the Temp Sensor is placed inside the refrigerator then the refrigerator metal walls may slightly attenuate the BLE propagating signal and thus weakens the Signal Level, and this may explain why the SSI is reading the lowest (-79 dBm) at 9.0 C . Very well detailed explanation of BLE Advertising and Beacon methods - many thanks - tons of applications for those methods.
thanks dave, its pretty helpful to understanding Bluetooth manager but need some clarification how to find uuid and to read services of any other custom heath monitoring devices
Hi, It is really a nice video and that helped me in my development of the BLE application. In our application, we are using smart android phone and BLE watch, now, i want to pass command from the watch by pressing "command" button to smart phone and based on that i want to do some activities to be opened up on mobile phones. so can you please guide me how my application will trace the command to be fired by BLE watch. thanks in advance.
Can you please tell me the which heart rate monitor support the GATT profile ,The first type is a short 16-bit UUID. The predefined Heart rate service, e.g., has the UUID 0x180D and one of its enclosed characteristics, the Heart Rate Measurement characteristic, has the UUID 0x2A37. which heart rate monitor is now available in market
Hello, first say thatyour video its really interesting and secondly, I have a sensor tag and I would like to know if you have any application where you use the accelerometer of sensor tag to view data in your App. Thanks
Hi Dave, Great demo.. I am developing an application to communicate to OBD2 - ELM327 device for reading car data(rpm, speed.. etc). Can you guide me how to do this ?.. I am able to connect via bluetooth.. but facing problem in communicating...
I try to make my own code and adopt your code to read and write characteristic, but i found that my writecharacteristic method return false. Can u help me why it return false?
I want to write in a characteristic that is not belong to a device information. I also want to write protect that characteristic with a password. Is it possible?
Maybe my mistake is related to the function "invalidateOptionMenu", because it says "Cannot resolve Symbols". Then It cannot connect to the device because the option menu does not appear after the scan. Do I have to declare in the file xml for the menu the "option menu" button? thanks
After API 21, the bluetoothAdapter.startLeScan(callback) is deprecated. Could you please suggest what is to be used instead. It seems we cannot use this "Activity implements BluetoothAdapter".
Akshaya Appaswamy ....hello Akshaya....I am not sure how to do that. Can you please guide or direct. I tried using those methods, but somehow they are not working. By the way, do you know any one in the Pune, India area. I am here these days, may be we can collaborate and complete the project. Let me know. Thanks again.
Great tutorial, thanks a ton Dave, i have a specific requirement based on PROXIMITY, can you please tell me why isnt PROXIMITY included in the Profile/Services? CC2541 doesnot support Proximity? it would be a great help.
Hi Great demo, i have developed an android application for one BLE sensor. And the application connect to the sensor successfully, while calling the mBluetoothGatt.discoverServices() function, getting an exception. I have checked different application in Nexus7 tablet, but not solved this issue. Any solution for this issue. -tony-
Thank u very much for your help with this tutorial. If I have one service with two characteristic (I'm using Environmental Sensing with Temperature and Humidity characteristics), is the same approach? I'm using your code and the app is able to discover my device, but after scan, it stops the scan! have you any idea about the possible mistake?
Hi Dave, I have a question regarding your code. Each time you receive a callback in OnCharactericChange, you post the reference to the characteristic inside a message to the main thread. However, OnCharactericChange is a callback from another thread. How do we know that the reference to the characteristic object is still valid once the main thread receives the message (since the callback is already over once the message is received)? Thanks!
thank you very much, i was stuck on : BluetoothGattDescriptor d = readCharacteristic.getDescriptor(UUID.fromString("XX-XXXX-XXXX")); d.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); mGatt.writeDescriptor(d);
Dave Smith again to the rescue! Thank you so much for this Dave.
One of the best android tutorials I've seen
hey i need your help
its too important related to study and work
so kindly contact me ASAP
Very well done. Trying to follow the Android developer examples are very confusing due to the code being split across many classes. The examples you provided are well organized and easy to follow. The state machine that is used to register different gatt notifications was huge. I was having a hard time getting more than one gatt notification to work. Thank you for posting this.
@27:30 and since the Temp Sensor is placed inside the refrigerator then the refrigerator metal walls may slightly attenuate the BLE propagating signal and thus weakens the Signal Level, and this may explain why the SSI is reading the lowest (-79 dBm) at 9.0 C . Very well detailed explanation of BLE Advertising and Beacon methods - many thanks - tons of applications for those methods.
Working with 2 Ion sensors and trying to display the temps. This was very helpful!
Thank you very much for this tutorial. You helped me get my Bluetooth app working at long last!
Budda bless you for this TUT.
Thank you!
Such beautiful code organization... very inspiring! Thanks :D
Very good stuff. Thanks a lot for teaching and sharing.
thanks dave, its pretty helpful to understanding Bluetooth manager but need some clarification how to find uuid and to read services of any other custom heath monitoring devices
Thank you for this excellent tutorial.
Hi,
It is really a nice video and that helped me in my development of the BLE application.
In our application, we are using smart android phone and BLE watch, now, i want to pass command from the watch by pressing "command" button to smart phone and based on that i want to do some activities to be opened up on mobile phones. so can you please guide me how my application will trace the command to be fired by BLE watch.
thanks in advance.
Excellent video
PLz tell us about the UUID and necessary things we need to connect to our sensor.
Great tutorial. Thank you so much.
This is so helpful! Thank you so much!
Thank you very much for the video.
How can i discover bluetooth device in the background
It is a good tutorials,
Is it possible to make Bluetooth Le services as started services so we can run in background indefinitely.
Great Tutorial Very useful
Can you please tell me the which heart rate monitor support the GATT profile ,The first type is a short 16-bit UUID. The predefined Heart rate service, e.g., has the UUID 0x180D and one of its enclosed characteristics, the Heart Rate Measurement characteristic, has the UUID 0x2A37. which heart rate monitor is now available in market
Hello, I am using the nrf8001 chip. How can I find the UUID for the proximity services. Can any one help please?
Shouldn't there invalidateOptionsMenu being called? In onOptionsItemSelected for action_scan, after mDevices was clear
Dear sir, Could you tell me, "get distance from my android device to ibeacon" ?
Hello, first say thatyour video its really interesting and secondly, I have a sensor tag and I would like to know if you have any application where you use the accelerometer of sensor tag to view data in your App. Thanks
Hi how to send the data from characteristic changed to the activity to display in the ui?
Hi Dave, Great demo.. I am developing an application to communicate to OBD2 - ELM327 device for reading car data(rpm, speed.. etc). Can you guide me how to do this ?.. I am able to connect via bluetooth.. but facing problem in communicating...
I try to make my own code and adopt your code to read and write characteristic, but i found that my writecharacteristic method return false. Can u help me why it return false?
I want to write in a characteristic that is not belong to a device information. I also want to write protect that characteristic with a password. Is it possible?
Maybe my mistake is related to the function "invalidateOptionMenu", because it says "Cannot resolve Symbols". Then It cannot connect to the device because the option menu does not appear after the scan. Do I have to declare in the file xml for the menu the "option menu" button? thanks
Hi i want to develop a multimeter app that is connected via wifi can you please give me some idea to create it? Thankyou
sir how i make offline android bluetooth assistent for artificial intelligence mode .like a google assistant
After API 21, the bluetoothAdapter.startLeScan(callback) is deprecated. Could you please suggest what is to be used instead. It seems we cannot use this "Activity implements BluetoothAdapter".
you can use deprecated methods however it is not recommended in the long run
Akshaya Appaswamy ....hello Akshaya....I am not sure how to do that. Can you please guide or direct. I tried using those methods, but somehow they are not working. By the way, do you know any one in the Pune, India area. I am here these days, may be we can collaborate and complete the project. Let me know. Thanks again.
Jkp
whats JKP?
Your should use BluetoothLeScanner
Hi,
I want to develop the same app in my watch. can you help me please ?
were is a link to your code?
Hi, I wana ask how to modify the code to connect universal sensor?
like common BLE scanner
Great demo and tutorial Dave I am curious how you recorded/streamed the android screen?
Shahzada, we have an HDMI adapter for the Nexus 7 that mirrors the display on the external output.
thanks, I have been using BBQScreen for live demos (which need to be streamed), but I guess HDMI in should also work.
i'm confused.
me 2
me 3
Hi confused, I'm dad!
Great tutorial, thanks a ton Dave, i have a specific requirement based on PROXIMITY, can you please tell me why isnt PROXIMITY included in the Profile/Services? CC2541 doesnot support Proximity? it would be a great help.
how to find UUID for a device?
This is very interesting.....
Hi all, can anyone provide a source code, please ? You see couldnt find it at the link under the video.
Hi have you found the source code or not, if you are found share with me the link please
Hi Great demo, i have developed an android application for one BLE sensor.
And the application connect to the sensor successfully, while calling the mBluetoothGatt.discoverServices() function, getting an exception. I have checked different application in Nexus7 tablet, but not solved this issue.
Any solution for this issue.
-tony-
Thank u very much for your help with this tutorial. If I have one service with two characteristic (I'm using Environmental Sensing with Temperature and Humidity characteristics), is the same approach? I'm using your code and the app is able to discover my device, but after scan, it stops the scan! have you any idea about the possible mistake?
did u find the solution ??
esci il codice x)
Hi Dave,
I have a question regarding your code. Each time you receive a callback in OnCharactericChange, you post the reference to the characteristic inside a message to the main thread. However, OnCharactericChange is a callback from another thread. How do we know that the reference to the characteristic object is still valid once the main thread receives the message (since the callback is already over once the message is received)?
Thanks!
Hi, does it work smoothly with HM-10 BLE modules ?
I keep getting an error in the gradle every time I try to run the code!
I see that lambda expressions are not supported in Android Studio, can you please let me know how did you implement them...
Android Studio is pretty printing the anonymous inner class.
Java's anonymous inner class is a clunky way to write a lambda.
Use retrolambda
Thank You for tutorial. I want to develop accelerometer in sensortag to my app. How can i do it ?
did you find anything helpful? i want to implement accelerometer and gyroscope as well. please if you found anything let me know.!
What SW do you use to cast Android device screen to PC (?) with clicks feedback visible?
i think he was using bluestacks.....
I found the source code for this tutorial, maybe someone needs github.com/devunwired/accessory-samples/tree/master/BluetoothGatt
You're the best
Could you provide link to github?
What font are you using ?
Can i get the source code of the app ?
thank you very much, i was stuck on :
BluetoothGattDescriptor d = readCharacteristic.getDescriptor(UUID.fromString("XX-XXXX-XXXX"));
d.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mGatt.writeDescriptor(d);
Hi have you found the source code or not, if you are found share with me the link please
thanks a lot
so excited!
thank you!!!!
He's making this harder than it has to be. This is part of Apple's plan.
can i get the code?
Are you reading any specific book?
Can anyone mail me the source code of this tutorials
why dont u show uuid?
You need to think about me watching the video on a tv or a handheld device and not being able to see the code.
i want to get the code
ch m hanif y me pregunto
Yet his Apple computer is right in front of us. I think this guy is an "insider" trying to discourage people from competing with Apple.
DON'T WORK
crcl.to/smart LINK NO WORKING
Great tutorial! Thank you.