Perhaps I’m misunderstanding your question, but as it’s a serial line, you’ll have to read everything sent from the Arduino sequentially – it’ll be buffered up in the Arduino until you read it. If you want to have a status display which shows the latest thing sent – use a thread which incorporates the code … Read more
You can use inWaiting() to get the amount of bytes available at the input queue. Then you can use read() to read the bytes, something like that: While True: bytesToRead = ser.inWaiting() ser.read(bytesToRead) Why not to use readline() at this case from Docs: Read a line which is terminated with end-of-line (eol) character (\n by … Read more
There are many ways of doing this, to name a few: send UDP messages from the Raspi to the PC send a TCP stream from the Raspi to the PC throw the readings into Redis and allow anyone on your network to collect them – example here publish the readings from your Raspi with an … Read more
Unfortunately, ax.grid is a bit confusing in this regard. (This is a design bug / common gotcha.) It turns the minor grid on, but the minor ticks are still turned off. What you need to do is call plt.minorticks_on or ax.minorticks_on in addition to calling ax.grid(True, which=”both”).
Instead of using pySerial + thread it is better to use QSerialPort that is made to live with the Qt event-loop: from PyQt5 import QtCore, QtWidgets, QtSerialPort class Widget(QtWidgets.QWidget): def __init__(self, parent=None): super(Widget, self).__init__(parent) self.message_le = QtWidgets.QLineEdit() self.send_btn = QtWidgets.QPushButton( text=”Send”, clicked=self.send ) self.output_te = QtWidgets.QTextEdit(readOnly=True) self.button = QtWidgets.QPushButton( text=”Connect”, checkable=True, toggled=self.on_toggled ) lay = … Read more
Use the following code to see all the available serial ports: import serial.tools.list_ports ports = list(serial.tools.list_ports.comports()) for p in ports: print p This gives me the following: (‘COM4’, ‘Arduino Due Programming Port (COM4)’, ‘USB VID:PID=2341:003D SNR=75330303035351300230’) (‘COM11’, ‘RS-232 Port (COM11)’, ‘FTDIBUS\\VID_0856+PID_AC27+BBOPYNPPA\\0000′) To work out if it’s an Arduino you could do something like: if “Arduino” … Read more
I’m having the same issue and implemented my own readline() function which I copied and modified from the serialutil.py file found in the pyserial package. The serial connection is part of the class this function belongs to and is saved in attribute ‘self.ser’ def _readline(self): eol = b’\r’ leneol = len(eol) line = bytearray() while … Read more
Using a separate thread is totally unnecessary. Just do this for your infinite while loop instead (Tested in Python 3.2.3). I use this technique in my eRCaGuy_PyTerm serial terminal program here (search the code for inWaiting() or in_waiting). import serial import time # Optional (required if using time.sleep() below) ser = serial.Serial(port=”COM4″, baudrate=9600) while (True): … Read more
This is the code I use. Successfully tested on Windows 8.1 x64, Windows 10 x64, Mac OS X 10.9.x / 10.10.x / 10.11.x and Ubuntu 14.04 / 14.10 / 15.04 / 15.10 with both Python 2 and Python 3. import sys import glob import serial def serial_ports(): “”” Lists serial port names :raises EnvironmentError: On … Read more
Blog post Serial RS232 connections in Python import time import serial # configure the serial connections (the parameters differs on the device you are connecting to) ser = serial.Serial( port=”/dev/ttyUSB1″, baudrate=9600, parity=serial.PARITY_ODD, stopbits=serial.STOPBITS_TWO, bytesize=serial.SEVENBITS ) ser.isOpen() print ‘Enter your commands below.\r\nInsert “exit” to leave the application.’ input=1 while 1 : # get keyboard input input … Read more