react-native-ble-manager | React Native BLE communication module

I've been attempting to detect whether a bluetooth device is connected to an android phone once a button is clicked. If detected, I would like to interact with this device from within my app. The device I'm talking about is http://www.senanetworks.com/sd1000-01.html .

I've used the example code of https://www.npmjs.com/package/react-native-ble-manager to test it out, but unfortunately, it's not picking up this device even though the regular settings app does. Additionally, checking for already connected peripherals does not work if I connected to the device outside of the app. Any tips on how to do this?

I am trying to implement the Bluetooth service my application. But when scanning is staring my apps to that time not showing Mobile Bluetooth and BLUETOOTH EARPHONES Bluetooth.

Only show without name Bluetooth in console.

Please help this issues.

I am trying to get the Raspberry pi Bluetooth signal or the peripheral device characteristic on my React-Native application. I am using react-native-ble-manager to scan and detect the peripheral devices. So far I got most of the devices like TV, Smart-Bands etc. But not getting the raspberry signal.

I did confirm if the network is enabled and visible to my mobile from the device(Mobile) Bluetooth Manager. Everything seems to be fine. I am using a realme XT handset for this application. I have also checked on different handsets and even those had the same problem. So, I think it's the problem of the component and not the mobile.

If there is a different approach with different package, even that approach is fine for me. Can someone help me on this!!.

Thank You!!

I have been trying to use an react native ble librairie (react-native-ble-manager). In order to use this the user have to allow location permission (as explain in the documentation android.permission.ACCESS_COARSE_LOCATION and android.permission.ACCESS_FINE_LOCATION if android API >= 29. I request the autorisation as their example with: (PermissionsAndroid is from the react-native librairie) :

We in our team have two Android 10 devices, none of them can detect devices on them using react-native-ble-manager.

There is no changing in the code from the Git ReadMe. Code is working on <= Android 8 devices.

Package.json:

My setup is as follows:

1. BLE Peripheral in Raspberry Pi 3
2. nRF tool in Android Phone
3. My App in the same Android Phone (uses react-native-ble-manager)

When I connect to the Raspberry Pi using nRF tool, it connects successfully. But, when I connect using my own Android App it fails.

In the Raspberry Pi, I ran sudo btmon command to examine the failure log which is shown below:

I've gone through link : https://github.com/facebook/react-native/issues/23835#issuecomment-493007479

But got no solution. I got the understanding that this bug is triggered when

1. You send NaN in array on react native bridge. I don't know much about it.
2. During use of invalid data (infinity) in animation.
3. During bottom navigation.
4. Using menu.
5. Showing response data in Alert or Notifications as Toasts.

I am using react-native-ble-manager.

Procedure: I sent write message using characteristic that allows write, after setting notifications on for characteristic that allows read. I got 'ack' in the response listener that was used to receive notifications, and then I start sending custom data chunks by chunks as designed.

I get this error during this first chunk was being sent.

I've checked my uint8Array for any wrong data using iteration and to, but couldn't found any.

From my logs: