Installing ZMQ packages for MATLAB

[Zahra-on-Github]

I am totally new to ZMQ. To provide an interaction between my eye tracking device (Pupil Core) and MATLAB (R2020b), I have to install two packages:

https://github.com/fagg/matlab-zmq https://github.com/bastibe/matlab-msgpack

They cannot be installed correctly and I keep getting errors. I need to know what is missing on my laptop (Windows 10 Pro), for them to be correctly installed.

[fagg]

I am not telepathic, so I'd suggest you provide the error message (verbatim) so we can potentially help.

On Thu, 14 Jan 2021 at 14:17, ZahraRezazadeh1 notifications@github.com wrote:

I am totally new to ZMQ. To provide an interaction between my eye tracking device (Pupil Core) and MATLAB (R2020b), I have to install two packages:

https://github.com/fagg/matlab-zmq https://github.com/bastibe/matlab-msgpack

They cannot be installed correctly and I keep getting errors. I need to know what is missing on my laptop (Windows 10 Pro), for them to be correctly installed.

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[Zahra-on-Github]

Sorry for the miscommunication.

Windows 10 Pro MATLAB R2020b ZMQ libzmq-v141-mt-4_3_2

I am trying to interact with my eye tracking device, and as I run the script that uses ZMQ, I get this error:

Error using zmq.core.ctx_new Attempt to execute SCRIPT ctx_new as a function: C:...\matlab-zmq-master\lib+zmq+core\ctx_new.m

Error in pupil_remote_control (line 13) ctx = zmq.core.ctx_new();

[Zahra-on-Github]

Have I explained the error clearly? Do I need to mention more information about the problem?

[Zahra-on-Github]

I'd appreciate your guidance as soon as it is possible for you, since I'm on a clock here. I need to figure out what I'm doing wrong.

[fagg]

1. Download the ZMQ zip file (as you have done).
2. Unzip it, noting the path where you unzipped it.
3. In config_win.m, set the following:

ZMQ_COMPILED_LIB = 'libzmq-v141-mt-4_3_2.lib'; ZMQ_LIB_PATH = 'C:\Path\To\Where\You\Unzipped'; ZMQ_INC_PATH = 'C:\Path\To\Where\You\Unzipped';

4. Run make.m.
5. If that doesn't solve you problem, please post a code snippet.

Please also note that this project is not a full-time endeavor for me and I am not compensated for my time spent working on this. There is no guarantee of any support or warranty at all, let alone on a timeline specified by you or anyone else. I have a demanding full time job and other priorities that take precedence over answering Github tickets. As such, the service-level agreement is that I will endeavor to answer when I am able to. Please be understanding of this.

[Zahra-on-Github]

make.m ran successfully, as shown here:

...
... 
...
Building with 'MinGW64 Compiler (C)'.
MEX completed successfully.

Succesful build for:
    ZMQ_INCLUDE_PATH = C:\...\libzmq
    ZMQ_LIB_PATH = C:\...\libzmq
    ZMQ_COMPILED_LIB = libzmq-v141-mt-4_3_2.lib

ans =

  logical

   1

but the script where I try to communicate with my device still gives an error. Here's the script:

% pupil_remote_control.m

% (*)~----------------------------------------------------------------------------------
%  Pupil Helpers
%  Copyright (C) 2012-2016  Pupil Labs
% 
%  Distributed under the terms of the GNU Lesser General Public License (LGPL v3.0).
%  License details are in the file license.txt, distributed as part of this software.
% ----------------------------------------------------------------------------------~(*)
% Pupil Remote address
endpoint =  'tcp://127.0.0.1:50020';
% Setup zmq context and remote helper
ctx = zmq.core.ctx_new();
socket = zmq.core.socket(ctx, 'ZMQ_REQ');
% set timeout to 1000ms in order to not get stuck in a blocking
% mex-call if server is not reachable, see
% http://api.zeromq.org/4-0:zmq-setsockopt#toc19
zmq.core.setsockopt(socket, 'ZMQ_RCVTIMEO', 1000);
fprintf('Connecting to %s\n', endpoint);
zmq.core.connect(socket, endpoint);
tic; % Measure round trip delay
zmq.core.send(socket, uint8('t'));
result = zmq.core.recv(socket);
fprintf('%s\n', char(result));
fprintf('Round trip command delay: %s\n', toc);
% set current Pupil time to 0.0
zmq.core.send(socket, uint8('T 0.0'));
result = zmq.core.recv(socket);
fprintf('%s\n', char(result));
% start recording
pause(1.0);
zmq.core.send(socket, uint8('R'));
result = zmq.core.recv(socket);
fprintf('Recording should start: %s\n', char(result));
pause(5.0);
zmq.core.send(socket, uint8('r'));
result = zmq.core.recv(socket);
fprintf('Recording stopped: %s\n', char(result));
% test notification, note that you need to listen on the IPC to receive notifications!
send_notification(socket, containers.Map({'subject'}, {'calibration.should_start'}))
result = zmq.core.recv(socket);
fprintf('Notification received: %s\n', char(result));
send_notification(socket, containers.Map({'subject'}, {'calibration.should_stop'}))
result = zmq.core.recv(socket);
fprintf('Notification received: %s\n', char(result));
zmq.core.disconnect(socket, endpoint);
zmq.core.close(socket);
zmq.core.ctx_shutdown(ctx);
zmq.core.ctx_term(ctx);

and the error is:

Error using zmq.core.ctx_new
Invalid MEX-file 'C:\...\matlab-zmq-master\lib\+zmq\+core\ctx_new.mexw64': The specified module could not be found.

Error in practice_run (line 23)
ctx = zmq.core.ctx_new();

while the module exists exactly where it's looking for it.

[Zahra-on-Github]

I understand the service-level agreement, but if you know how this problem can be solved, or you know someone who knows, pleeease let me know.

[Zahra-on-Github]

Ok I got it to work! Now, when I make test , 16 of the tests pass, and 2 fail:

>> make test
Running test (1/18): test_context_cleanup...[PASS]
Running test (2/18): test_context_get...[PASS]
Running test (3/18): test_socket_bind...[PASS]
Running test (4/18): test_socket_connect...[PASS]
Running test (5/18): test_socket_get...[FAIL]
Running test (6/18): test_socket_send_recv...[PASS]
Running test (7/18): test_socket_send_recv_multipart...[PASS]
Running test (8/18): test_socket_send_recv_string...[PASS]
Running test (9/18): test_socket_set...[PASS]
Running test (10/18): test_zmq_bind...[PASS]
Running test (11/18): test_zmq_connect...[PASS]
Running test (12/18): test_zmq_ctx_get...[PASS]
Running test (13/18): test_zmq_getsockopt...[FAIL]
Running test (14/18): test_zmq_req_rep...[PASS]
Running test (15/18): test_zmq_req_rep_multipart...[PASS]
Running test (16/18): test_zmq_setsockopt...[PASS]
Running test (17/18): test_zmq_socket...[PASS]
Running test (18/18): test_zmq_version...[PASS]
Elapsed time is 3.490147 seconds.
Error using runner (line 67)
Tests: 16 passed, 2 failed.

test_socket_get (line 61):
    rcvbuf should be 0, -1 given.

test_zmq_getsockopt (line 59):
    ZMQ_RCVBUF should be 0, -1 given.

Error in make>run_tests (line 96)
  success = runner(varargin{:});

Error in make (line 33)
        success = run_tests(varargin{2:end});

Any idea how to solve this?