Socket and Serial Read and Write using QThread
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@J-Hilk YEs this code works perfectly and has helped me a lot but I encountered an issue where the send button is not there instead the the data received is processed further and the updated data sends to be sent automatically which does not happen if I remove the clicked.connect method. Also, as said initially in my query, I had already achieved what you have shared but the only problem is sending of the data in the same port without the use of any buttons. The data will keep changing and needs to be sent continuously.
here is my sample code that I tried:
#!/usr/bin/env python3import os, sys
from PyQt5 import QtWidgets
from PyQt5.QtSerialPort import QSerialPort
from PyQt5.QtCore import QLibraryInfo, pyqtSignal, pyqtSlot, QObject
from PyQt5.QtWidgets import QDialog, QApplication
from PyQt5.uic import loadUios.environ["QT_QPA_PLATFORM_PLUGIN_PATH"] = QLibraryInfo.location(
QLibraryInfo.PluginsPath
)class SerialPortManager(QObject):
data_received = pyqtSignal(str)def __init__(self, parent=None): super().__init__(parent) self.serial_port = QSerialPort() self.serial_port.readyRead.connect(self.on_ready_read) def open_port(self, port_name): if self.serial_port.isOpen(): self.serial_port.close() self.serial_port.setPortName(port_name) self.serial_port.setBaudRate(QSerialPort.Baud115200) self.serial_port.setDataBits(QSerialPort.Data8) self.serial_port.setParity(QSerialPort.NoParity) self.serial_port.setStopBits(QSerialPort.OneStop) self.serial_port.open(QSerialPort.ReadWrite) def write_data(self, data): if self.serial_port.isOpen(): self.serial_port.writeData(data.encode()) @pyqtSlot() def on_ready_read(self): if self.serial_port.canReadLine(): data = self.serial_port.readLine().data().decode('ISO-8859-1').strip() self.data_received.emit(data)class GCS(QDialog):
def init(self):
super(GCS, self).init()
loadUi('GCS.ui', self)self.serial_manager = SerialPortManager() self.serial_manager.open_port("/dev/ttyACM0") self.serial_manager.data_received.connect(self.on_data_received) def send_data(self): data_to_send = "1" self.serial_manager.write_data(data_to_send) @pyqtSlot(str) def on_data_received(self, data): self.send_data() print("Received: " + data)app=QApplication(sys.argv)
mainwindow=GCS()
widget=QtWidgets.QStackedWidget()
widget.addWidget(mainwindow)
widget.show()
app.exec_()@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
The data will keep changing and needs to be sent continuously
What exactly is the problem? If you have new data to send then send it, you do not need any buttons for that.
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@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
The data will keep changing and needs to be sent continuously
What exactly is the problem? If you have new data to send then send it, you do not need any buttons for that.
@jsulm Maybe I am unable to explain what I am trying to achieve which show lack of communication skills from my side. Is there any way we can connect over internet like a zoom/google meet where I can explain what I want to achieve and how can I achieve it? Also, at the same time you can show me what is previously explain in my query by you and @JonB
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@jsulm Maybe I am unable to explain what I am trying to achieve which show lack of communication skills from my side. Is there any way we can connect over internet like a zoom/google meet where I can explain what I want to achieve and how can I achieve it? Also, at the same time you can show me what is previously explain in my query by you and @JonB
@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
Is there any way we can connect over internet like a zoom/google meet
No
But it should be possible to simply explain what you want to do and where you have problems. -
@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
Is there any way we can connect over internet like a zoom/google meet
No
But it should be possible to simply explain what you want to do and where you have problems.@jsulm Ok I tried the method you both suggested but if I used QSerialPort. I got to know it takes a while to update the data and print that is coming from QSerialPort, Also, I am taking live video from "127.0.0.7:5000", data from "127.0.0.7:5001", data from arduino serial port "/dev/ttyACM0", joystick input using inputs.get_gamepad and processing the whole data using ML after which I send a few data to arduino back to perform certain tasks and another bunch of data through the socket port "127.0.0.7:5001". Only in UI I am able to see the video and rest happens in background. I want to achieve this with zero latency and currently using QThread I am unable to achieve it. also tried the QSerialPort but saw latency there also.
This is the summary what I am trying to achieve. -
@jsulm Ok I tried the method you both suggested but if I used QSerialPort. I got to know it takes a while to update the data and print that is coming from QSerialPort, Also, I am taking live video from "127.0.0.7:5000", data from "127.0.0.7:5001", data from arduino serial port "/dev/ttyACM0", joystick input using inputs.get_gamepad and processing the whole data using ML after which I send a few data to arduino back to perform certain tasks and another bunch of data through the socket port "127.0.0.7:5001". Only in UI I am able to see the video and rest happens in background. I want to achieve this with zero latency and currently using QThread I am unable to achieve it. also tried the QSerialPort but saw latency there also.
This is the summary what I am trying to achieve.@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
also tried the QSerialPort but saw latency there also
What kind of latency? Is your UI thread freezing? Do you use the approach suggested (using readyRead signal without any threads, waiting and loops)?
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@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
also tried the QSerialPort but saw latency there also
What kind of latency? Is your UI thread freezing? Do you use the approach suggested (using readyRead signal without any threads, waiting and loops)?
@jsulm Using the method suggested (QSocketPort), I implemented to read data from Arduino and print the the data in next statement and the statment after this reads data from joystick and prints data. Both these data are stored in a dictionary. The print statement prints this dictiondary. Now when I give inputs from gamepad and arduino switches either gamepad value changes or arduino value changes and this I observed from the print statement.
Should I try multithreading or I am making this complicated? If multithreading is done then just after receiving the data how is simultaneous send data on serial or tcp port is possible?
Yes I used ready signal:
def init(self, parent=None):
super().init(parent)
self.serial_port = QSerialPort()
self.serial_port.readyRead.connect(self.on_ready_read) -
@jsulm Using the method suggested (QSocketPort), I implemented to read data from Arduino and print the the data in next statement and the statment after this reads data from joystick and prints data. Both these data are stored in a dictionary. The print statement prints this dictiondary. Now when I give inputs from gamepad and arduino switches either gamepad value changes or arduino value changes and this I observed from the print statement.
Should I try multithreading or I am making this complicated? If multithreading is done then just after receiving the data how is simultaneous send data on serial or tcp port is possible?
Yes I used ready signal:
def init(self, parent=None):
super().init(parent)
self.serial_port = QSerialPort()
self.serial_port.readyRead.connect(self.on_ready_read)@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
I implemented to read data from Arduino and print the the data in next statement and the statment after this reads data from joystick and prints data. Both these data are stored in a dictionary
I'm still not sure I understand. Do you mean in the slot on_ready_read you also read something from joystick? If so why?
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@VIDYUL-SHAH said in Socket and Serial Read and Write using QThread:
I implemented to read data from Arduino and print the the data in next statement and the statment after this reads data from joystick and prints data. Both these data are stored in a dictionary
I'm still not sure I understand. Do you mean in the slot on_ready_read you also read something from joystick? If so why?
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@jsulm I read the serial data from arduino using on_ready_read but I am using a qthread to read data from joystick
@VIDYUL-SHAH Then I don't understand what your problem is
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@VIDYUL-SHAH Then I don't understand what your problem is
@jsulm No worries I have solved the issue and didn't use QSerial or QSocket instead used python serial and socket module inside QThread and it is efficient than using QSerial or QSocket as of what I have coded. THank for the help who all contributed here.
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V VIDYUL SHAH has marked this topic as solved on
