i am able to run the lowenergyscanner example on Qt5.15.8 and can read the BLE characteristic and services.
The BLE device wants to Pair it with windows and a setting message pops out in windows to put the 6 digits pairing code that the peripheral device gives.
Is it possible to pass the pairing code directly to windows via Qt?
So i went and use the other Qt example the btscanner and i could also scan the same device and i had an option to "Pair" it but nothing happens.
I also set the pairing request argument from QBluetoothLocalDevice::Paired to QBluetoothLocalDevice::AuthorizedPaired but it didnt work out.
So does Qt provide a mechanismus to pass the 6 digit code to windows without promp the user bluetooth windows pair message?
Related
Im trying to develop a ble application, where a peripheral device (a Ti CC2650LP) reads sensor data via UART and writes them to a characteristic. The central device (a Win 10 PC) reads this characteristic via notification and outputs it in a special software.
My problem is: when I use my test pc everything works fine, but when ich use a different pc with my software i always get the same readings. It seems i cant access the characteristic. Everytime i reconnect the peripheral as a bluetooth device, the reading changes, but the software still only shows this one reading. I can see in my software, that the characteristic gets read but the value doesnt change. I'm pretty sure its a connection issue.
Has anyone had this kind of issue before?
I am new to android.I have Raspberry pi 3 device.I can connect mobile device to Raspberry pi 3 over classic Bluetooth.now i am confused about Raspberry how to connect mobile device to Raspberry over bluetooth low energy.we can connect BLE device to android device and get Characteristics and can write Characteristics.now i want to do same thing in Raspberry pi 3 like (heart rate monitor,MI band 2)
Do it using a program
You can do it programmatically using DBus Calls. DBus is an interprocess Communication method used in linux. You can use DBus bindings for different languages such as python or C to make the DBus calls and do the operations.
A few links to help you get started :
DBus tutorial - https://dbus.freedesktop.org/doc/dbus-tutorial.html
BLE DBus API - https://elinux.org/images/3/32/Doing_Bluetooth_Low_Energy_on_Linux.pdf
Using Gatttool from terminal
Gatttool is a terminal tool just like hcitool. You can use the following commands to get the thing working:
hcitool lescan Gives you the list of nearby Low Energy Devices
gatttool -b mac_adress_of_le_device -I gives you an interactive session with the mentioned LE device
From the interactive session give connect to connect to the device
primary to get the primary services.
From this result, you can use the handle values to get the list of characteristics of a specific service. characteristics handle
To get the value of a characteristic use char-read-hnd handle
To get the characteristic descriptor, use char-desc handle
to write to a characteristic char-write-req handle value
Hope This helps!
Im running Qt on ubuntu. I want to write a simple program that recieves a line from android device(this device already has a program to connect and send info) over Bluetooth. How do i start a bluetooth server in QT? I tried to find examples, but all of them act like a client that looks for connection. My program should wait for connection and once it gets a connection, it waits for incoming messages and reads them.
The Bluetooth API provides connectivity between Bluetooth enabled devices.
You can find Bluetooth examples in Qt website here, also see some Bluetooth examples in Qt Creator examples.
Bluetooth chat example and Bluetooth file transfer example is works for you.
The Bluetooth chat example may be used with various Bluetooth terminal applications. For example you could compile the Qt BT chat example on your computer and connect to it from your cell phone running a Bluetooth Terminal application.
In order to do that all that is needed is to change the UUID values as described here and here. That is, in the chatserver.cpp file of the example one needs to change:
static const QLatin1String serviceUuid("e8e10f95-1a70-4b27-9ccf-02010264e9c8");
Becomes:
static const QLatin1String serviceUuid("00001101-0000-1000-8000-00805F9B34FB");
You may also want to do the same thing in the chat.cpp if you are planning on using the client mode as well (in this case make sure to change the reversed UUID also, as described in this bug).
Is there a way to connect to multiple scanners at the same time in SPP Mode?
I am using the Socket ScanAPI SDK 10 (the ScanApiHelper class) in a C# Windows Forms Project as host.
I changed the serialport setting from ScanAPI to e.g. SerialPorts=COM3:;COM6: (inbound ports)
But only one scanner connects to the host. If i turn off one scanner the other one connects immediately. But connecting two scanners at the same time does not work. It seems both scanners are communicating over the same com port.
Also it does not work with the official Socket Scan 10 Software from www.socketmobile.com (i tested on Windows 7 and 8.1)
For posterity's sake, here is the complete answer.
The cause
By default, the CHS uses SDP to look for all incoming serial ports, but only attempts to connect to the first one. If the port is busy - i.e. another scanner is already connected - it gives up.
The solution
Caveat emptor: This solution has not been tested on the full range of Bluetooth stacks. It should work, but there may be side-effects. If you experience any, please report them to us.
Your CHS can be configured to try to connect to up to 8 different serial ports on the host device. Instead of quitting after failing to connect to the first serial port, in Scan Mode 1 the CHS will try the next serial port until it either finds a port it can connect to or it has tried all the ports it found using SDP.
1D scanners and 8Qi
Note: If you have a laser scanner, you will need to print out these barcodes to scan them.
Factory reset your scanner
Hover to reveal barcode
Enable SPP mode
Hover to reveal barcode
Enable Scan Mode 1
Hover to reveal barcode
2D scanners (excl. 8Qi)
Factory reset your scanner
Hover to reveal barcode
Enable SPP mode
Hover to reveal barcode
Enable Scan Mode 1
Hover to reveal barcode
Revert
Don't need Scan Mode 1 anymore? Scanning the factory reset barcode for your scanner will clear all settings and put your scanner back in the default mode.
The support from socketmobile told me to scan the barcode for "Scan Mode 1".
Now connecting to multiple scanners at the same time works perfectly
I have a problem with Windows CE 6 and a DIGI device with processor Freescale IMX51. I wrote an application in C # using the BSP of DIGI, to use the ARM eSPI (enhanced Serial Peripheral Interface).
Then using the functions issued by DIGI, in debug, I can active a OLED using SPI, but when I launch the application on the device, the OLED no longer works.
I have seen with an oscilloscope that when I load the application in debug mode the number of bits is correct, i.e., the clock has 8 rising edges, but when the application is launched from the device, the clock increases somewhat, that is, I see 9 bits. This also happens when I use the .exe from the debug directory.
I do not understand why this is happening. Can anyone help me solve this problem?