{"id":37,"date":"2026-02-20T16:45:03","date_gmt":"2026-02-20T16:45:03","guid":{"rendered":"https:\/\/papaya.hopto.org\/?p=37"},"modified":"2026-02-20T16:45:04","modified_gmt":"2026-02-20T16:45:04","slug":"notes-linux-to-pi-io-testing","status":"publish","type":"post","link":"https:\/\/papaya.hopto.org\/?p=37","title":{"rendered":"Notes – Linux to Pi IO testing"},"content":{"rendered":"\n
    \n
  1. Install Pycharm in Ubunto 20.04 LTS.<\/li>\n<\/ol>\n\n\n

    \u00a0 \u00a0 sudo snap install pycharm-community –classic<\/strong><\/p>\n\n\n

    2. Install vncserver<\/p>\n\n\n\n

       sudo apt update\n\n   sudo  apt install sc xfce4 xfce4-goodies\n\n   sudo apt install tightvncserver<\/code><\/pre>\n\n\n\n
    3. Configure vncserver<\/p>\n\n\n\n
    vncserver -kill :1\nmv ~\/.vnc\/xstartup ~\/.vnc\/xstartup.bak\nnano ~\/.vnc\/xstartup\n\nAdd the following lines to xstartup\n<\/code><\/pre>\n\n\n\n
    #!\/bin\/bash\nxrdb $HOME\/.Xresources\nstartxfce4 &<\/code><\/pre>\n\n\n\n
    chmod +x ~\/.vnc\/xstartup<\/code><\/pre>\n\n\n\n
    Start vncserver<\/p>\n\n\n\n
    vncserver<\/code><\/pre>\n\n\n\n
    On another computer that is running VNCviewer, enter IP:5901 where IP is the IP address of the Ubuntu computer. If there are display issues ,<\/p>\n\n\n\n
    touch ~\/.Xauthority\nsudo chown $USER:$USER ~\/.Xauthority\n<\/code><\/pre>\n\n\n\n
    Install pyuic . Python3.12 is already installed in Ubuntu. For some reason when installing the package in PyCharm with a virtual environment it fails to install pyqt5-tools. The one below works.<\/p>\n\n\n\n
    sudo apt install pyqt5-dev-tools<\/code><\/pre>\n\n\n\n
    To generate a python file for the  ui created in QTDesigned<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    pyuic5  untitled.ui -o test.py <\/code><\/pre>\n\n\n\n
    Generated test.py. Note that the test.py file should not be modified. Instead the ui file should be changed and then the above command is run again. Part of code for test.py<\/p>\n\n\n\n
    # -*- coding: utf-8 -*-\n\n# Form implementation generated from reading ui file 'untitled.ui'\n#\n# Created by: PyQt5 UI code generator 5.14.1\n#\n# WARNING! All changes made in this file will be lost!\n\n\nfrom PyQt5 import QtCore, QtGui, QtWidgets\n\n\nclass Ui_MainWindow(object):\n    def setupUi(self, MainWindow):\n        MainWindow.setObjectName(\"MainWindow\")\n        MainWindow.resize(800, 600)\n        self.centralwidget = QtWidgets.QWidget(MainWindow)\n        self.centralwidget.setObjectName(\"centralwidget\")\n        self.label = QtWidgets.QLabel(self.centralwidget)\n        self.label.setGeometry(QtCore.QRect(100, 90, 121, 16))\n        self.label.setObjectName(\"label\")\n        self.AOut0 = QtWidgets.QLCDNumber(self.centralwidget)\n        self.AOut0.setGeometry(QtCore.QRect(400, 120, 64, 23))\n        self.AOut0.setObjectName(\"AOut0\")\n        self.label_10 = QtWidgets.QLabel(self.centralwidget)\n        self.label_10.setGeometry(QtCore.QRect(240, 90, 121, 16))\n        self.label_10.setObjectName(\"label_10\")\n        self.layoutWidget = QtWidgets.QWidget(self.centralwidget)\n        self.layoutWidget.setGeometry(QtCore.QRect(210, 120, 16, 181))\n        self.layoutWidget.setObjectName(\"layoutWidget\")\n        self.verticalLayout_3 = QtWidgets.QVBoxLayout(self.layoutWidget)\n        self.verticalLayout_3.setContentsMargins(0, 0, 0, 0)\n        self.verticalLayout_3.setObjectName(\"verticalLayout_3\")\n        self.label_11 = QtWidgets.QLabel(self.layoutWidget)\n        self.label_11.setObjectName(\"label_11\")\n        self.verticalLayout_3.addWidget(self.label_11)\n        self.label_12 = QtWidgets.QLabel(self.layoutWidget)\n        self.label_12.setObjectName(\"label_12\")\n        self.verticalLayout_3.addWidget(self.label_12)\n        self.label_13 = QtWidgets.QLabel(self.layoutWidget)\n        self.label_13.setObjectName(\"label_13\")\n        self.verticalLayout_3.addWidget(self.label_13)\n        self.label_14 = QtWidgets.QLabel(self.layoutWidget)\n<\/code><\/pre>\n\n\n\n
    To use the form  in your python file import the class<\/p>\n\n\n\n
    from test import UI_MainWindow<\/p>\n\n\n\n
    Sample code  display.py<\/strong><\/p>\n\n\n\n
    import sys
    from test import Ui_MainWindow
    from PyQt5.QtWidgets import QMainWindow,QApplication, QWidget,QPushButton,QLCDNumber


    class Setup(QMainWindow,Ui_MainWindow): # inherit from the base class and the Ui_MainWindow so that ui elements are available

     def __init__(self,parent=None): #parent=None means a top level window
            super().__init__(parent) # calls the constructor of the parent classes
                                     # for proper initialization
            self.setupUi(self)


    if __name__ == '__main__':
        app = QApplication(sys.argv)
        window = Setup()
        window.show()
        sys.exit(app.exec())
    ~


    <\/code><\/pre>\n\n\n\n
    Note:  In PyCharm, if  pyqt5-tools is enabled,  just open a terminal ( bottom left) and type pyuic5 file.ui -o  test.py to generate the python file. <\/p>\n\n\n\n
    <\/p>\n","protected":false},"excerpt":{"rendered":"
    \u00a0 \u00a0 sudo snap install pycharm-community –classic 2. Install vncserver 3. Configure vncserver Start vncserver On another computer that is running VNCviewer, enter IP:5901 where IP is the IP address of the Ubuntu computer. If there are display issues , Install pyuic . Python3.12 is already installed in Ubuntu. For some reason when installing the … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_regular_price":[],"currency_symbol":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"post_slider_layout_featured_media_urls":{"thumbnail":"","post_slider_layout_landscape_large":"","post_slider_layout_portrait_large":"","post_slider_layout_square_large":"","post_slider_layout_landscape":"","post_slider_layout_portrait":"","post_slider_layout_square":"","full":""},"_links":{"self":[{"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=37"}],"version-history":[{"count":16,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/posts\/37\/revisions"}],"predecessor-version":[{"id":97,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=\/wp\/v2\/posts\/37\/revisions\/97"}],"wp:attachment":[{"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/papaya.hopto.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}