gatt

问题 I am trying to communicate with an IoT device by BlueTooth connectivity. first, I have paired the device using BlueTooth. Then prepared the Hexadecimal value using AES encryption Send a request to the device using characteristic write I tried to read the response from the device using characteristic Read but I got the status as 1 and data is null. These are the steps which I have done and the code I mentioned below. BluetoothGatt gatt; BluetoothGattCallback gattCallback = new

问题 I'm having an issue with Bluetooth Gatt characteristic reading at the moment. I was trying to run the code with my own custom profile thermometerCharacteristic.ValueChanged += temperatureMeasurementChanged; It causes this exception An exception of type 'System.ArgumentException' occurred in mscorlib.ni.dll but was not handled in user code Additional information: Value does not fall within the expected range. My function arguments looks like this void temperatureMeasurementChanged

问题 I am looking to send information from my Android device to a micro-controller (such as an Arduino). Using Bluetooth Classic I simply send a byte array of data to the micro-controller, and process the byte array accordingly. I started reading about Bluetooth Low Energy and I am hearing all this talk about GATT profiles. Why should I create a GATT profile? What is a GATT profile going to do for me in the case of exchanging information from an Android device to a micro-controller? Thanks in

问题 I am looking to send information from my Android device to a micro-controller (such as an Arduino). Using Bluetooth Classic I simply send a byte array of data to the micro-controller, and process the byte array accordingly. I started reading about Bluetooth Low Energy and I am hearing all this talk about GATT profiles. Why should I create a GATT profile? What is a GATT profile going to do for me in the case of exchanging information from an Android device to a micro-controller? Thanks in

问题 I am using Android 5.0.1 Lollipop and developing Bluetooth Low Energy server-client communication. I have Samsung Galaxy s4. I have three characteristic in my Custom Service. I made one of the characteristic's property as write-only and encrypted write. Then I changed it to non-encrypted write. The write operation didnt work for this characteristic anymore. I knew I have to restart Bluetooth adapter from settings and unpair the device but it doesn't work anymore at all. Then I changed the

问题 I am working on an android application which reads data from a BLE device. I came across plenty of solutions here on how to read multiple characteristics and most of them suggested Queues. I did implement the Queue method and everything is working fine in my code as expected. The reason why i started this thread is to find the best possible and most efficient solution and also to clear some of my doubts regarding how certain BLE service characteristics work. I have taken the below two links

问题 I'm attempting to use GATT on my Linux box to set up a custom service with a load of characteristics. Using this question, and the ones it links to, I was able to identify the code that I would need to write (making use of the gatt_service_add() function). I've created a separate file called gatt_service.c, and written the code I think that I need. However, I cannot work out how to link my code to the Bluez libraries in order to compile and run my solution. For example this site (whilst not

问题 I remember reading in the "Guide and Hint"-doc to the Samsung BLE API (archived page): One of the most important concepts of the Samsung F/W and stack is its synchronous nature . That is, if we call for example, writeCharacteristic for a particular characteristic, if it returns true , the next call to any BluetoothGatt or BluetoothGattServer method should be done after the onCharacteristicRead callback is received. This is because the stack is designed to support and process only one GATT

问题 Device used for testing: Nexus 4, Android 4.3 Connection is working fine but the onCharacteristicChanged Method of my callback is never called. However I am registering for notifications using setCharacteristicNotification(char, true) inside onServicesDiscovered and that function even returns true. Device log (there are actually no messages at all when notifications should appear / are sent via the Bluetooth device): 07-28 18:15:06.936 16777-16809/de.ffuf.leica.sketch D/BluetoothGatt:

问题 I'm trying to communicate with a BLE module through a Linux machine (the module is running a heart rate profile). So far, I've been able to do everything I need except listening for Notifications and indications (e.g. listening for the Heart Rate Measurement Notification). I'm using kernel version 3.5 and bluez-5.3. Succcessful commands used so far: hcitool lescan hcitool lecc gatttool -b <Mac Address> --primary gatttool -b <MAC Address> --characteristics gatttool -b <MAC Address> --char-read