No GUI Mode

[tkotonkla]

Could I use the ADS-B demodulator block without the QT GUI Time sink or another block?
Because I need to run this file in No GUI Mode via the python file in raspberry pi in no desktop mode.

[mhostetter]

Yes, you can. Just disable the QT GUI blocks and set the flowgraph to No GUI Mode.

[tkotonkla]

Thank you so much for your response, sir.
When I follow your suggestion, The ADS-B demodulator block changed to a red block. I think it requires some output after I disable the QT GUI Time Sink block. How I fix it?

[mhostetter]

Ah, yes. You'll need to connect the orange output that currently goes to the QT GUI Time Sink to a Null Sink. See here: https://wiki.gnuradio.org/index.php/Null_Sink.

[tkotonkla]

Thank you, sir.
It working.
I have another question about ZMQ Pub. I try to write a python script file to get the raw data but it doesn't work.
Could you advise on how to retrieve the data?

[mhostetter]

Please refer to the webserver.py implementation. It shows how to setup a ZMQ subscriber and receive the decoded ADS-B packets.

gr-adsb/web/webserver.py

Lines 44 to 55 in 5d0361d

	def zmq_thread():
	# Establish ZMQ context and socket
	context = zmq.Context()
	socket = context.socket(zmq.SUB)
	socket.setsockopt(zmq.SUBSCRIBE, b"")
	socket.connect("tcp:https://{:s}:{:d}".format(ZMQ_ADDRESS, ZMQ_PORT))
	while True:
	# Receive decoded ADS-B message from the decoder over ZMQ
	pdu_bin = socket.recv()
	pdu = pmt.deserialize_str(pdu_bin)
	plane = pmt.to_python(pmt.car(pdu))

[tkotonkla]

Awesome, I have done everything. Thank you, sir.