On Tue, 9 Oct 2018 at 21:56, Sylvain Leroux <sylvain@xxxxxxxxxxx> wrote: > > Hi Barry, > > Thanks for the reply: > > On 10/09/2018 10:30 PM, Barry Byford wrote: > > You might want to take a look at the Bluedot library that has used the > > DBus API to communicate over the Serial Port Profile. > > Server: > > https://github.com/martinohanlon/BlueDot/blob/master/bluedot/btcomm.py#L141 > > Client: > > https://github.com/martinohanlon/BlueDot/blob/master/bluedot/btcomm.py#L466 > > > > The main section using DBus is in: > > https://github.com/martinohanlon/BlueDot/blob/master/bluedot/utils.py > > I started to explore the bluedot sources. From what I understand, I need > in the shell something like the `register_spp` function > (https://github.com/martinohanlon/BlueDot/blob/master/bluedot/utils.py#L101) > > > I'm currently investigating how I could use `busctl` to reproduce that > behavior. Not my area of expertise but it seems like it might be difficult because there would be no event loop. Hopefully someone else can jump in on that point. > > I noticed the function mostly send some XML description to the > `org.bluez.ProfileManager1` interface (see code below). The author has decided to do it that way. You don't have to. Here is a different example: https://gist.github.com/ukBaz/217875c83c2535d22a16ba38fc8f2a91#file-spp-profile > There are a > couple of hard coded constants in the code, including the UUID > "00001101-0000-1000-8000-00805f9b34fb". Are those "well known" values I > can blindly use? That UUID refers to the Serial Port Profile. You can see the full list of assigned numbers at: https://www.bluetooth.com/specifications/assigned-numbers/service-discovery > > > - Sylvain > > > ---- > def register_spp(port): > > service_record = """ > <?xml version="1.0" encoding="UTF-8" ?> > <record> > <attribute id="0x0001"> > <sequence> > <uuid value="0x1101"/> > </sequence> > </attribute> > <attribute id="0x0004"> > <sequence> > <sequence> > <uuid value="0x0100"/> > </sequence> > <sequence> > <uuid value="0x0003"/> > <uint8 value="{}" name="channel"/> > </sequence> > </sequence> > </attribute> > <attribute id="0x0100"> > <text value="Serial Port" name="name"/> > </attribute> > </record> > """.format(port) > > bus = dbus.SystemBus() > > manager = dbus.Interface(bus.get_object(SERVICE_NAME, "/org/bluez"), > PROFILE_MANAGER) > > path = "/bluez" > uuid = "00001101-0000-1000-8000-00805f9b34fb" > opts = { > # "AutoConnect" : True, > "ServiceRecord" : service_record > } > > try: > manager.RegisterProfile(path, uuid, opts) > except dbus.exceptions.DBusException as e: > #the spp profile has already been registered, ignore > if str(e) != "org.bluez.Error.AlreadyExists: Already Exists": > raise(e) > ----
