Scanning BLE beacons

jenya7

But what data do you want to read? Manufacturer data? Device UUID? Address?

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

OK. I understand. I can use info directly like info.name, but how do I get data (no info.data).
Yes I want to se all beacon raw data - payload. I need no services. It's a remote sensor sending me temperature, humidity, pressure, etc.

J.Hilk

@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

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.