core-bluetooth

I am sporadically getting the message "CoreBluetooth[WARNING] Unknown error: 1309” on the console when running a BlueTooth app I am developing. Even though the message states that it is a warning, it stops execution of the app. I have been able to work around this problem by turning the Bluetooth setting off and then back on. Can anyone tell me what is causing this and what I should do to avoid it? That's a known issue, It's caused due to deadlock in CoreBluetooth (Apple's bug), 1309 error is mostly appears when your app operates as a Central and Peripheral, and when the operations are

I need to develop with BLE technology. I found some introductions and source code: http://processors.wiki.ti.com/index.php/Category:IPhone4SBLEDemo but I didn't find any tutorial to start from scratch with this technology (CoreBluetooth framework) from choose the sensor for testing, also WWDC 2011 Is there any tutorial to start with BLE technology on iOS? Many Thanks! Unfortunately there isn't much out there for the core bluetooth framework as it is relatively new. I would suggest acquiring a very solid understand of how bluetooth low energy works before writing any code. A couple of decent

I want to send data from iPhone to a bluetooth device which get discovered and connects. I am referring this tutorial to connect. I am not able to send data to external bluetooth device which is connected as we do with External Accessory framework. I am using iPhone5 as it has Bluetooth 4.0 In Core Bluetooth you need to use the characteristics for communication. There is no standard stream based API like in the External Accessory Framework and I don't know of any open source libraries that implement something like that. Basic operation Peripheral -> Central: Central subscribes to

What I want is for my iOS device to be advertising a Bluetooth LE service all the time, even when the app isn't running, so that I can have another iOS device scan for it and find it. I have followed Apple's backgrounding instructions here: https://developer.apple.com/library/ios/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/PerformingCommonPeripheralRoleTasks/PerformingCommonPeripheralRoleTasks.html#//apple_ref/doc/uid/TP40013257-CH4-SW1 . I can get it to advertise in the foreground ok and sometimes in the background but it doesn't stay advertising all the time. If you

I want to use the CBCentralManager in order to find the bluetooth low energy peripherals around me. The centralManager is getting initiated, it starts correctly and it is scanning. But the didDiscover function is never called. I read all the other posts to this and similar problem and am 99% sure that my problem has not the same cause. Still, I cannot find what I did wrong. import Foundation import CoreBluetooth @objc(SmallerBeaconServiceImpl) class SmallerBeaconServiceImpl : NSObject, CBCentralManagerDelegate, CBPeripheralDelegate { private let centralManager : CBCentralManager func

I added Siri Shortcuts to my application and to utilize voice commands The error Im getting in the debugger is: [CoreBluetooth] API MISUSE: can only accept this command while in the powered on state I have looked at a vast number of duplicates of this for issue on here and the consensus is that CBCentralManager needs to be a class level variable, which I have. I still cannot get UpdatedState delegate method to execute more than one time in the context of Siri Voice Commands or the new iOS 13 shortcuts app. This means my application cannot do consecutive functions. Keep in mind, it works ONCE,

I have a requirement in which i have to send an image from ios device to another device corebluetooth, other device is BLE device. Basic needs are: 1) Image should be of size 128X160 2) 8-Bit i.e 8 bits per color 3) 3 channels 4) 24 bit per pixel 5) Image should have 61440 byes i.e (3X128X160) To get 3 channel and 24bit per pixcel i am using below code of OpenCV as in native ios i dint find option to convert UIImage into 24bit bitmap //uiimg is 128X160 size cv::Mat image; cv::Mat convertedImage; UIImageToMat(uiimg, image); cvtColor(image, convertedImage, CV_RGBA2BGR); if i check number of byts