bonding | script used to configure | Chat library

You have defined a BluetoothReceiver to receive the result ,you just add the device information into a deviceList.

So basically you want to have a table with header with filenames and one string of data? Here is a snippet that might help you

This issue started occurring in Bluez v5.48 after the battery GATT characteristic was moved into the DBUS org.bluez.Battery1 interface. When a Pi and iOS device connect, the Pi attempts to read the iOS battery characteristic. A pair request is then triggered because either Apple has protected this characteristic from unpaired reads or something in Bluez erroneously determines that this characteristic is protected. I've found two different ways to fix this issue without recompiling Bluez.

1. Easy Solution: Prevent the Bluez battery plugin from loading at boot. You will need to modify the bluetooth service file located at the following path: /lib/systemd/system/bluetooth.service . In this file, go to the line that begins with "ExecStart" and make sure that this line has "ExecStart=/usr/lib/bluetooth/bluetoothd -P battery" (without the surrounding quotes). This -P option prevents any listed plugins from loading.

2. Custom Solution: Write your own custom agent that auto-accepts pairing requests. I used the Bluez simple-agent example and modified it so that the RequestPinCode function always returned successfully instead of asking for input. The downside of this type of approach is that this still asks the iOS user to pair. Although, this can be a positive outcome if you want to have the reliability and encryption access from a fully paired bluetooth connection.

The issue you are facing is to due improper use of library linking. The easiest solution is to

1. Download DPDK 18.11.11 LTS that supports meson.
2. Build dpdk libraries and install to the desired path.
3. modify dpvs src/dpdk.mk to check for libdpdk via pkg-conf
4. modify src/makefile to accommodate the changes for DPDK libraries

An explanation for the steps are briefly mentioned in section 3.24 Buidlign application with installed DPDK

[EDIT-1] note: Since there are no updates on the changes done to Makefile from @Anshul, I have created a push request to support the same.

diff for src/Makefile

You are creating 2 apps, which is not needed. Instead of inheriting from both Screen and App in the Loginscreen, inherit only from Screen. Then create a ScreenManager in your main.py's build method and then add the imported loginscreen as a widget, to switch to the new screen, use self.manager.current = "login" in the call_login method of MainWindow

"findContours" returns a tuple of two values. The correct usage is:

To determine the bbox of the rotated rectangle, you can compute the coordinates of the 4 vertices and take the bbox of these 4 points.

• a is the width of the unrotated rectangle and b its height ;

• let diag = sqrt(a * a + b * b) / 2 the distance from the center to the top right corner of this rectangle. You can use diag = hypot(a, b) / 2 for better precision ;

• first compute the angle theta0 of the first diagonal for theta=0: theta0 = atan(b / a) or better theta0 = atan2(b, a) ;

• the 4 vertices are:

  • { diag * cos(theta0 + theta), diag * sin(theta0 + theta) }
  • { diag * cos(pi - theta0 + theta), diag * sin(pi - theta0 + theta) }
  • { diag * cos(pi + theta0 + theta), diag * sin(pi + theta0 + theta) }
  • { diag * cos(-theta0 + theta), diag * sin(-theta0 + theta) }

• which can be simplified as:

  • { diag * cos(theta + theta0), diag * sin(theta + theta0) }
  • { -diag * cos(theta - theta0), -diag * sin(theta - theta0) }
  • { -diag * cos(theta + theta0), -diag * sin(theta + theta0) }
  • { diag * cos(theta - theta0), diag * sin(theta - theta0) }

• which gives x1 and y1:

  • x1 = diag * fmax(fabs(cos(theta + theta0)), fabs(cos(theta - theta0))
  • y1 = diag * fmax(fabs(sin(theta + theta0)), fabs(sin(theta - theta0))

• and the width and height of the rotated rectangle follow:

  • width = 2 * diag * fmax(fabs(cos(theta + theta0)), fabs(cos(theta - theta0))
  • height = 2 * diag * fmax(fabs(sin(theta + theta0)), fabs(sin(theta - theta0))

This is the geometric solution, but you must take into account the rounding performed by the graphics primitive, so it is much preferable to use the graphics API and retrieve the pixbuf dimensions with gdk_pixbuf_get_width() and gdk_pixbuf_get_height(), which will allow for precise placement.

There's an issue with some versions of Android when the bonding (with LE) operation occurs. In Nordic's source code, there's indeed a comment (source) that confirms it:

You can use positive lookahead so that so that you don't miss the first letter after the period.