Hello, Thank you for your reply. Yes gatt is the way to go. I tried in bluetoothctl using gatt.list_attributes gatt.select_attribute, selecting the tx uuid and the send some bytes. Exactly what I need. But that is directly in bluetootctl. I don't want to do that by doing a wrapper around it. How can I implement it directly in C? Do you have a scenario for a gatt connection in C? Cristian-Stefan Cristian-Stefan On Thu, Feb 16, 2023 at 11:04 PM Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx> wrote: > > Hi Neacsu, > > On Thu, Feb 16, 2023 at 11:20 AM Neacsu Cristian > <neacsu.cristianstefan@xxxxxxxxx> wrote: > > > > Hello, > > > > Long story short, I am trying to connect with a linux PC using a > > Bluetooth 5 universal adapter (Asus USB-BT500) to a Bluetooth 5 module > > PCB, called BT832X which is using a Bluetooth Low Energy Technology > > that is using a chip Nordic nRF52832 (see url for the module > > documentation https://static1.squarespace.com/static/561459a2e4b0b39f5cefa12e/t/63de8b578e4d7813cde64445/1675529048975/BT832X-p+Product+Specifications.pdf). > > Therefore I tried everything, reading docs, sniffing through the > > bluetoothctl sources, gatttools sources, and I am not able to open and > > connect on a socket on my PC to connect properly. > > Usually for legacy Bluetooth stuff, I create a RF_COMM socket, and the > > magic is done by itself. No biggie. > > Here I tried an L2CAP approach (not sure if I had a proper > > configuration), I tried to use the gatttool as it is, without success. > > I feel a bit lost. > > The remote device is working properly, because using the Nordic > > demo Android app (downloadable from Google Play Store), I am able to > > communicate with the PCB and exchange packages. > > Do you have a functional, very simple sample, or suggestion, > > preferably in C, to help me to open a socket and send a data package? > > I mean, you have a BLE module, you want to connect with it using > > BlueZ, how do you open a socket, how do you configure it, connect to > > it and send a byte through it? > > Let's keep in mind that I am already able to scan for the > > destination address (I created a custom agent in bluetoothctl that is > > fishing data using the "scan on" command), so the address that I'm > > connecting to is already known. > > > > Thank you and I'm really really looking forward to your reply. > > I guess for LE what you really want is to use GATT procedures, which > are available via bluetoothctl> menu gatt > > > Cristian-Stefan > > > > -- > Luiz Augusto von Dentz
