bluetooth-le | Capacitor plugin for Bluetooth Low Energy

I'm working with an ESP32 chip and am trying to create an Android app (using Ionic) which allows user to send wifi credentials to the ESP32 chip via BLE. I'd like to be able to update the status of the wifi sending process for the user in the UI (which I'm developing using Angular and then converting it to an Android webapp using Ionic). To do this, I'm also using the capacitor-community/bluetooth-le library.

Can anyone explain to me what this.queue does in the async write function (code shown below) does? I thought this function returns a response from a remote BLE device after writing to a GATT characteristic, but I get absolutely nothing at all for a response.

I'm stuck with this task about reading some data from my BLE Device.

I have a HM-19 DSD Tech Bluetooth LE module on my target machine, and I want communicate with it with my smartphone.

I'm using Xamarin with Plugin.BLE to try to achieve this.

There is my BluetoothPage.xaml.cs code

I need to connect my app to a BLE device (not another smartphone). I'm searching for a bluetooth ionic plugin and I saw that there are three of them but I don't understand the differences very well. There are some resources / tutorials about ionic bluetooth plugins that can help understand these?

https://ionicframework.com/docs/native/ble

https://ionicframework.com/docs/native/bluetooth-le

https://ionicframework.com/docs/native/bluetooth-serial -> is to be used only to connect to an Arduino device right?

Thank you

I have been working through several BLE tutorials to develop an app to connect to an ESP32, but I cannot get the code to connect to the ESP32. I am using a Samsung phone which requires a time delay, but I have tried other phones and still cannot connect the ESP32 to the mobile app.

If I run a BLE scanner app I can connect to the ESP32, so I believe the ESP32 side is okay. If we scan for devices we can see it in the bluetooth device list.

The code is setup to detect and connect, I have tried a UUID and device name filer, but it will not connect. The ScanCallback is been triggered and we get the function onBatchScanResults been called, so we can see a list of devices but it will not connect to the ESP32. I think it should connect automatically with the gatt functions.

I cannot workout why it will not auto connect to the ESP32, as it's seen the devices and the scan connect is been trigged. Any help would be highly appreciated to fix this issue, as I have ran out of idea to fix it.

I worked on a Ble peripheral, I used a queue from this article to send data, but it works only one time.

I received a request from Central after a successful connection with the value "0301" then in the same characterstic I set the data (ssid) and I notify it, so right now everything works fine, and the app (peropheral) stop receiving request.

I need to transfer data from android phone to each other through my application using BLE. When a device comes near to me and my application is already installed in it, So my phone will establish a connection and send some data in strings and also receive from that device without notify user. Is it possible to do with BLE and I have studied BLE from

https://developer.android.com/guide/topics/connectivity/bluetooth-le

But I am new so I dont know from where to start and what should i have to do? Kindly let me know about BLE more easy for my better understanding and refer me some tutorials where I can learn that how will fulfill my application functionalities.

Thanks

I have been fighting a bug for a few days now. I have been looking everywhere on a solution to this. I am at my end on what I can do.

Basically, my iOS app is crashing on startup. I am getting a SIGABT fault code with an error: FIXME: ftnptr_arg page trampolines. I will attach a copy of the crash report below. I found some posts that are a little similar to my issue on this site:

Got a SIGABRT while executing native code xamarin.ios

SIGABRT error after last Xamarin.iOS update

Xamarin IOS app crashes with exception: EXC_BAD_ACCESS (SIGABRT)

and on GitHub: https://github.com/mono/mono/issues/9871

I have tried these solutions and they do not work for me. I would also like to add that I am using the Bluetooth on the device. I did add the correct permissions in the Info.plist file. The Bluetooth library that I am using is Plugin.BLE: https://github.com/xabre/xamarin-bluetooth-le

Anyways, the crash is happening on a page that does not access the bluetooth device. It is happening on a log in page (which is the first page that is displayed to the user). I do not think that the issue is related to the bluetooth. Like I said previously, I am pretty much at the end of what I can do. Not sure what is going on. Has anyone else out there ran into the issue?

Additional Note:

I would like to also add that I am able to debug the initialization of the form and step through the code without it crashing. I only have 3 functions. One for initialization, another for when the form appears, and a third for when a button is pressed. I can step through the code on the first 2 functions. After the program executes these two, the app crashes. I know that it is not an issue with my code because the same code runs fine on Android.

Also, I would create a minimalist code to post, however, the app includes a number of pictures and graphics that I think would be too large to post here. And I do not think that the issue is related to the code that I wrote. As said above, the code runs fine on Android.

Crash debug report:

I am trying to build a BLE provisioning app using Ionic and the BluetoothLE plugin. But, when I import the plugin, it gives me a blank screen. I've updated to ionic 5 and everything is up to date. I'm trying to build it through the usb debugging mode on android studio. And it works fine until I add the import statement.

I'm importing it the way the docs have it import { BluetoothLE } from '@ionic-native/bluetooth-le/ngx';

The plugin is installed properly and it is recognized as something to import. But for some reason it just bricks the app.

here's the package-lock.json: