Scanning BLE beacons

sierdzio

It's been a long time since I've done it, sorry I don't remember the details. Check the example docs above, it explains how to connect to various services and characteristics, then you can start receiving the data.

jenya7

@J-Hilk said in Scanning BLE beacons:

@sierdzio said in Scanning BLE beacons:

Or you want to read the data that the device is sending? To do that, you need to connect to it first. https://doc.qt.io/qt-5/qtbluetooth-lowenergyscanner-example.html#connecting-to-services

not with beacon, beacons are not connectable. And the Qt Api gives no way to identify that.

what the op is looking for should be in
https://doc.qt.io/qt-5/qbluetoothdeviceinfo.html#manufacturerData-1

No. It has to get a payload. Every beacon has a payload (20 bytes) of my own data. App. I wrote on my phone (Android) gets all beacons and I see my payload too.
Wat's the point to get a beacon? To see it's name, rssi, and other fields ? I need the data it sends.

J.Hilk

@jenya7 I'm not sure to what you're replying ?

I said, your payload can be accessed via https://doc.qt.io/qt-5/qbluetoothdeviceinfo.html#manufacturerData-1

I do it too.

jenya7

@J-Hilk said in Scanning BLE beacons:

@jenya7 I'm not sure to what you're replying ?

I said, your payload can be accessed via https://doc.qt.io/qt-5/qbluetoothdeviceinfo.html#manufacturerData-1

I do it too.

I see. But info has no such field.

void BT_DEVICE::AddDevice(const QBluetoothDeviceInfo &info)
{
   info. //no manufacturerData
}

sierdzio

This function was introduced in Qt 5.12.

Maybe you are using older Qt version?

J.Hilk

@jenya7 said in Scanning BLE beacons:

@J-Hilk said in Scanning BLE beacons:

@jenya7 I'm not sure to what you're replying ?

I said, your payload can be accessed via https://doc.qt.io/qt-5/qbluetoothdeviceinfo.html#manufacturerData-1

I do it too.

I see. But info has no such field.

~~no, it does not, and here you come in and either~~
~~- expand DeviceInfo class that comes with the BTLE example and you're using~~

or
~~- create your own interface class that wraps around QBlueToothDeviceInfo~~

written before the edit of

void BT_DEVICE::AddDevice(const QBluetoothDeviceInfo &info)
{
info. //no manufacturerData
}

@sierdzio is probably right, what version are you using?

jenya7

@J-Hilk said in Scanning BLE beacons:

@sierdzio is probably right, what version are you using?

It is 5.11.3

jsulm

@jenya7 If you follow the link from @J-Hilk you will see that you need Qt >= 5.12 for that method.

jenya7

@jsulm said in Scanning BLE beacons:

@jenya7 If you follow the link from @J-Hilk you will see that you need Qt >= 5.12 for that method.

Wow. On Linux the latest available from repository is 5.11.3.

jsulm

@jenya7 said in Scanning BLE beacons:

On Linux the latest available from repository is 5.11.3

You can install newer versions using Qt Online Installer...

jenya7

@jsulm said in Scanning BLE beacons:

@jenya7 said in Scanning BLE beacons:

On Linux the latest available from repository is 5.11.3

You can install newer versions using Qt Online Installer...

I see no options for Linux there.

jsulm

@jenya7 And what is this: https://www.qt.io/download-thank-you?os=linux ?

jenya7

@jsulm said in Scanning BLE beacons:

@jenya7 And what is this: https://www.qt.io/download-thank-you?os=linux ?

sorry, may be stupid question - how do I run it?
tied this way

sudo /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 1: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: nC@�!@8: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 1: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: ELF: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 2: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: @#: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 3: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: Syntax error: "(" unexpected

sierdzio

chmod +x /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run

Do not install as root.

jsulm

@jenya7 No need for sudo.

# First make it executable
chmod u+x /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
# Run
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run

jenya7

@jsulm said in Scanning BLE beacons:

@jenya7 No need for sudo.

# First make it executable
chmod u+x /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
# Run
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run

chmod u+x /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
sudo /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 1: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: nC@�!@8: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 1: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: ELF: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 2: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: @#: not found
/home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: 3: /home/pi/Downloads/qt-unified-linux-x64-4.2.0-online.run: Syntax error: "(" unexpected

I tried also Properties-> Execute : Anyone
Then Double click -> Execute in terminal

It's linux-x64. I'm not sure Raspbian is 64 it's 32 as far as I know.

sierdzio

Raspbian is ARM, so it won't work anyway.

jsulm

@jenya7 @sierdzio Ah, it's on ARM. In this case you will need to build Qt by yourself if you require a newer version.

jenya7

@jsulm said in Scanning BLE beacons:

@jenya7 @sierdzio Ah, it's on ARM. In this case you will need to build Qt by yourself if you require a newer version.

Actually it's Debian fitted for Raspberry. I think 32-bit version will run but I see only 64-bit version available.

jsulm

@jenya7 said in Scanning BLE beacons:

I think 32-bit version will run

No it will not. RaspberryPi is ARM, not x86...