Cannot reliably find Spectrum Pro about titta

[iandol]

I modified Titta.init() to pass an optional address, if the address is passed it skips finding eyetrackers, and passes the address to TittaMex.init, and this works.

Patch:

diff --git a/Titta.m b/Titta.m
index 132c34f..b6e59f7 100644
--- a/Titta.m
+++ b/Titta.m
@@ -499,15 +499,18 @@ classdef Titta < handle
             end
         end
         
-        function out = init(obj)
+        function out = init(obj, address)
             % Initialize Titta instance
             %
-            %    Titta.init() uses the currently active settings to 
+            %    Titta.init([address]) uses the currently active settings to 
             %    connects to the indicated Tobii eye tracker and
-            %    initializes it.
+            %    initializes it. If you pass an optional [address], instead
+			%    of searching for eyetrackers it tries to open [address].
             % 
             %    See also TITTA.TITTA, TITTA.GETOPTIONS, TITTA.SETOPTIONS
             
+			if ~exist('address','var'); address = []; end
+
             % Load in our callback buffer mex
             obj.buffer = TittaMex();
             obj.buffer.startLogging();
@@ -519,7 +522,7 @@ classdef Titta < handle
             else
                 wfunc = @pause;
             end
-            while true
+            while isempty(address)
                 if iTry<obj.settings.nTryReConnect+1
                     func = @warning;
                 else
@@ -575,8 +578,12 @@ classdef Titta < handle
                     break;
                 end
 			end
-            % get our instance
+
+			if isempty(address)
             	theTracker = trackers(qTracker);
+			else
+				theTracker.address = address;
+			end
 
             % provide callback buffer mex with eye tracker
             obj.buffer.init(theTracker.address);

I can make a pull request (adding docs to readme) if you want...

[dcnieho]

Hi Ian, I do not know where the problem comes from, haven't seen it (but then i do not regularly use Linux). Is this one system or do you see it on others too?
Glad you found this solution (and glad i exposed the constructor using the address in the MEX, even if the matlab-side didn't use it. Yes, I'd love a pull request, lets make this available, there are probably more use cases than yours.

[iandol]

I think this is an mDNS problem somewhere, Tobii uses mDNS to find their eyetrackers, so a change in either their code or the avahi daemon which manages this is the likely culprit. I haven't checked on other machines yet, so it is possible this is some local glitch. I've posted a support request to Tobii anyway to see if they can reproduce.

Pull: #73

I'll have a look through the controller idea later today, the new advanced UI looks nice though I had problems getting a good calibration with it compared to a basic automatic on myself.

[dcnieho]

I'll leave this open as i can't be sure where the problem is for now...
Would you mind testing if https://pypi.org/project/TittaPy/ shows the issue:

import TittaPy
ets = TittaPy.find_all_eye_trackers()
print(ets)

run that a few times in a loop as it may fail every now and then

[iandol]

Hi @dcnieho — yes it seems to work fine in TittaPy (Python 3.12), which confuses me as i thought tittaPy was a wrapper for the C SDK and therefore should have the same problem?

[iandol]

Note, the feedback from tobii engineers was this discovery problem is some mDNS issue but they couldn't reproduce it on their setup...

[dcnieho]

Hi @iandol. Yeah, TittaPy is just a wrapper around the C SDK, same as TittaMex is, which is why i asked you to test. So, very strange!...

[iandol]

Python 3.12.1 (main, Jan 16 2024, 10:35:26) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import TittaPy
>>> ets = TittaPy.find_all_eye_trackers()
>>> print(ets)
[{'device_name': 'TPSP1-010109521381', 'serial_number': 'TPSP1-010109521381', 'model': 'Tobii Pro Spectrum', 'firmware_version': '2.9.0-oculus-0', 'runtime_version': 'Legacy TTP (4.24.0/33)', 'address': 'tet-tcp://169.254.7.39', 'frequency': 600.0, 'tracking_mode': 'human', 'capabilities': [<capability.can_set_display_area: 1>, <capability.has_external_signal: 2>, <capability.has_eye_images: 4>, <capability.has_gaze_data: 8>, <capability.can_do_screen_based_calibration: 32>, <capability.can_do_monocular_calibration: 256>, <capability.has_eye_openness_data: 512>], 'supported_frequencies': [1200.0, 600.0, 300.0, 150.0, 120.0, 60.0], 'supported_modes': ['human', 'monkey', 'great_ape', 'small_monkey']}]

But still nothing in MATLAB, e.g.

>> settings = Titta.getDefaults('Tobii Pro Spectrum');
>> t = Titta(settings);
>> t.init
Warning: Titta: No eye trackers of model 'Tobii Pro Spectrum' connected 
> In Titta/init (line 557) 
Warning: Titta: No eye trackers of model 'Tobii Pro Spectrum' connected 
> In Titta/init (line 557) 
Warning: Titta: No eye trackers of model 'Tobii Pro Spectrum' connected 
> In Titta/init (line 557) 
Error using Titta/init
Titta: No eye trackers of model 'Tobii Pro Spectrum' connected
No eye trackers connected. 
>> e=EyeTrackingOperations;
>> e.find_all_eyetrackers()
ans =
     []

There is something being triggered only via the MATLAB interface...

[dcnieho]

I really cannot imagine what that would be. Its exactly the same code under the hood of course, just different wrapper around it for calling that Titta function and converting the return value. Is this only on one system?

[iandol]

I've seen the same problem on two different workstations, but that could be that I use the same software tools on each (I use a script to automate my Linux install). But apart from using zerotier as a seperate private network, my network setup is very standard. I use a seperate PCIE network card only for Tobii using the recommended settings, something which always worked without issue before. Passing the address is a fair workaround for the moment... Anyway I think we can close this, thanks @dcnieho!

[dcnieho]

I hope this is one of these things that resolves itself again. Glad you can work with what you have now, and thanks for the new feature!

…

On Sat, Jan 27, 2024 at 10:03 AM Ian Max Andolina ***@***.***> wrote: I've seen the same problem on two different workstations, but that could be that I use the same software tools on each (I use a script to automate my Linux install). But apart from using zerotier as a seperate private network, my network setup is very standard. I use a seperate PCIE network card only for Tobii using the recommended settings, something which always worked without issue before. Passing the address is a fair workaround for the moment... Anyway I think we can close this, thanks @dcnieho <https://github.com/dcnieho>! — Reply to this email directly, view it on GitHub <#72 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANUOGMUED3JXMBZAXX2KCTYQS7EJAVCNFSM6AAAAABCD2727GVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSMJTGA4DIMRSGE> . You are receiving this because you were mentioned.Message ID: ***@***.***>