pyserial | Python serial port access library | Wrapper library
kandi X-RAY | pyserial Summary
kandi X-RAY | pyserial Summary
Python serial port access library
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Top functions reviewed by kandi - BETA
- Creates a simple terminal port .
- Sends a sub - negotiation message .
- Iterate all available ports
- Open the serial port .
- Handle the menu key .
- Returns the device s serial number .
- Returns a Serial object for the given URL .
- Open the port settings .
- Process an incoming command .
- Runs the serial .
pyserial Key Features
pyserial Examples and Code Snippets
Lines of Code : 11License : Strong Copyleft (CC BY-SA 4.0)
Copyif __name__ == '__main__':
with open('Text FILE69', 'a', newline='') as f:
write = csv.writer(f)
while True:
ctime = timec()
lat, lon = GPS()
Rows = (ctime, lat, lon)
writclass Reader(Serial):
def __init__(self, *args, **kwargs):
self.buffer = ''
super(Reader, self).__init__(*args, **kwargs)
def monitor(self, w, interval=10):
n = self.inWaiting()
if n != 0:
import serial
# cmd = '0101B00064000001'
class OMR_SERIAL_TOOL:
def __init__(self,port,baudrate):
self.omr = serial.Serial(port=port, baudrate=baudrate, timeout=0.5)
self.omr.parity=serial.PARITY_EVEN
self.omr#!/usr/bin/env python
import threading
import rospy
from std_msgs.msg import String
mutex = threading.Lock()
def msg_callback(msg):
# reentrang processing
mutex.acquire(blocking=True)
# work serial port here, e.g. send msg import serial
import time
MyPassWord = "This is the password"
def Send(s):
ser.write((s +'\r\n').encode())
time.sleep(.3)
z = ser.read(ser.in_waiting)
portx = "COM6"
bps = 115200
timex = 5
ser = serial.Serial(portx,bps,timeself.t.join()
command = bytes([int(input("Enter command: "))])
def countup(seconds):
global after_id
seconds += 1
timelabel['text'] = str(seconds)+"s"
after_id = root.after(1000, countup, seconds)
root.after_cancel(after_id)
countup(0)
def get_temp(ser, num_samples=50):
float_vals = [float(ser.readline()) for _ in range(num_samples)]
avg_val = sum(float_vals)/len(float_vals)
return str(avg_val) # convert to string for open cv
import serial, time
ser = serial.Serial('/dev/ttyS0', 115200)
ser.write(bytes([128]))
time.sleep(0.05)
ser.write(bytes([132,137,0x00,0xc8,0x00,0x01]))
Community Discussions
Trending Discussions on pyserial
QUESTION
I have a gps sensor that outputs latitude and longitude. Along with it I am calling the current time in timec(). I want to output these values into a text file that I can upload into excel for extrapolation. My outputs currently look like
14:48:48,"(36.12306, -97.06177333333332)"
And I need my outputs to look like
14:48:48, 36.12306, -97.06177333333332
I have tried what is below:
...ANSWER
Answered 2022-Mar-25 at 20:08Spread the result of GPS in to separate variables.
You should just open the file once, not every time through the loop. You can use f.flush() to flush the line to the file immediately.
QUESTION
I have 2 PLCs with serial port. one is mitsubishi Q00Jcpu mc protocol, another is omron hostlink protocol.
I tried to use python pyserial lib to write to the PLC and read response. But failed, I tried to use a serial tool to test and got nice response, serial tool success communicate with PLC, I read CIO address start 100 and size 2, it got 12345678, that is a true result.
my code :
...ANSWER
Answered 2022-Mar-19 at 02:45I figured it how, the return of serial.write is not the result. If need the response from device, should use read_until(), not sure weather this is a good way, please let me know if you have any suggestions. Anyway, the class i make, can read the omron PLC by giving different params, hope it can help someone.
DEMO:
QUESTION
I am trying to establish a secure channel SCP02 with a smart card using python. My smartcard is connected to the terminal using a serial port and I use pySerial to send APDUs.
I send commands SELECT ISD, INITIALIZE UPDATE correctly, and next I try to do EXTERNAL AUTHENTICATE as the python code below:
ANSWER
Answered 2022-Jan-10 at 10:45You can use the working Test Vectors from the GlobalPlatform library and test if your executed crypto logic is really working. It could also be that your card is using some key derivation scheme, i.e. the keys you are using cannot be used directly.
QUESTION
So I am working on a GUI (PyQt5) and I am multi-threading to be able to do data acquisition and real-time plotting concurrently.
Long story short, all works fine apart from stopping the thread that handles the data acquisition, which loops continuously and calls PySerial to read the com port. When a button on the GUI is pressed, I want to break the while loop within the thread so as to stop reading the com port and allow the com port to be closed safely.
Currently, none of the methods I have tried manage to gracefully exit the while loop inside the thread, which causes all kinds of errors with the PySerial library and the closed com port/ attempted reading in the thread. Here is what I have tried:
- Using a class variable (
self.serial_flag) and changing its state when the button is pressed. The thread loop then looks like this:while self.serial_flag: - Using a global variable (
serial_flag = Falseat top of the script). Definingglobal serial_flagat the top of the threaded function and same condition:while serial_flag: - Using a shared memory variable:
from multiprocessing import Value, then definingserial_flag = Value('i', 0)then in the loop checkingwhile serial_flag.value == 0: - Using
threading.Eventto set an event and use that as a break condition. Defining:serial_flag = threading.Event()and inside the thread while loop:if serial_flag.is_set(): break
None of these seem to work in breaking the while loop and I promise I have done my homework in researching solutions for this type of thing - I feel like there is something basic that I am doing wrong with my multithreading application. Here are the parts of the GUI that call/ deal with the thread (with my latest attempt using threading.Event):
...ANSWER
Answered 2022-Feb-17 at 10:42The problem occurs because you are closing the serial port without waiting for the thread to terminate. Although you set the event, that part of the code might not be reached, since reading from the serial port is still happening. When you close the serial port, an error in the serial library occurs.
You should wait for the thread to terminate, then close the port, which you can do by adding
QUESTION
I want to trigger an event whenever there is data to be read from a serial port while running a GUI. The pySerial module apparently has experimental functionality for that, but it isn't particularly well documented (I couldn't find any useful examples in the API).
This question appears to deal with the same or at least very similar task, but doesn't provide instructions to replicate it or working code examples.
I came up with this code:
...ANSWER
Answered 2022-Jan-18 at 11:10Your main concern is to be thread safe, when You are updating GUI from another running Thread.
To achieve this, we can use .after() method, which executes callback for any given tk widget.
Another part of Your request is to use Threaded serial reader.
This can be achieved by using ReaderThread accompanied with Protocol.
You can pick two protocols:
- raw data reader protocol, which reads data as they come
- line reader protocol, which enables us to read lines of data
Here is working code example, with two protocols mentioned above, so You can pick which one suits You. Just remember, that all data coming from serial port are just raw bytes.
QUESTION
I am trying to install Odoo15 Source dependencies on windows 10.
I run pip install -r requirements.txt.
Then this error occurs
ANSWER
Answered 2022-Jan-11 at 10:47Try using psutil version 5.6.7.
QUESTION
I'm trying to use pySerial running on an Ubuntu host to automate testing of an embedded controller. I can enter commands in a terminal window (e.g., PuTTY) and get responses from the EC all day long. However, when I try using a pySerial program to do the same thing, the EC stops echoing the commands after some time, right in the middle of echoing a command. From that point forward, the EC stops responding to the program, including not sending results from the command that was interrupted.
If I terminate the program and try to connect to the EC with a terminal again, the EC is unresponsive. If an external event happens that causes the EC to write output to the terminal, that information is displayed correctly. The problem persists until I reboot the EC - which also erases any logs of what was happening on the EC when the problem occurred. (The logs are only accessible through the serial port...)
It appears that something pySerial is doing causes the EC's input processing to stop. I tried typing Ctrl-Q (XON) hoping there was some software flow control going on that wasn't obvious, but that didn't make a difference. I've tried sending alternating commands in the program, sending blank lines between sending commands, inserting delays between when the commands are sent - but it dies, every time, after processing a few commands.
This is the script I'm currently using:
...ANSWER
Answered 2022-Jan-05 at 23:37It appears the testing procedure was actually in error: Following one of my colleague's example, I typed the "battery current" command into the terminal, got a response, then used the up-arrow key to re-run the command - which seems to work all day long.
However, that's not the same test: Up-arrow (which retrieves the last command from the EC's history) followed by is not the same as repeatedly typing the command and sending it.
When I repeatedly pasted the command into the terminal window as quickly as I could, the EC failed exactly the same way as did sending the commands using pySerial: The failure is internal to the EC, not something different pySerial was doing on the communication line.
QUESTION
I am trying to interface my SparkFun Qwiic Haptic Driver - DA7280 with Python3. My current set-up is as follows:
PC -USB to micro-USB-> SparkFun RedBoard Qwiic -Qwiic Cable-> Haptic Driver
I've trialed the accompanying Arduino sketch & managed to get the C++ code up and running fine; modulating the vibrator's intensity & frequency just fine.
Then, what I would like to do is to trigger a vibration pulse in time with some Python code. Such that, when python prints out a word, for example, a vibratory impulse would be triggered.
I have tried using pySerial to interface with the microcontroller, trigger the controller to run a pre-loaded script. This was worked fine with a simple C++ script to repeat an LED blink uploaded to the micro-controller:
...ANSWER
Answered 2021-Dec-30 at 15:33I suspect at least part of the problem is that you are not clearing the contents of the read buffer, only checking if something is there. Serial.flush() i think that as of Arduino 1.00 (don't quote me on that) serial flush doesn't do anything to the incoming buffer.
try adding a var = Serial.read() in before your hapDrive.setVibrate(25); and see if that changes the functionality.
I also HEAVILY recommend interrupts for serial. There's a serial event example that's really comprehensive (although i seem to remember that's not actually interrupt driven in the classical microcontroller sense, but it's close enough!)
QUESTION
i using VSCode as my IDE for development odoo and for now run using Start > Debugging ( F5)
While running at web browser localhost:8069 ( default ) then appear Internal Server Error and in terminal VSCode there are errors :
...ANSWER
Answered 2021-Dec-27 at 17:01After trying for a few days and just found out that pip and python in the project are not pointing to .venv but to anaconda due to an update. when error
no module stdnum
actually there is a problem with pip so make sure your pip path with which pip or which python
- to solve .venv that doesn't work by deleting the .venv folder, create venv in python, and install all requirements again
QUESTION
I am currently trying to run a Django project inside a docker container, to provide the project with a local DB.
The Project is depending on GDAL, but when trying to install the requirements it always runs into the same problem. The following is my dockerfile:
...ANSWER
Answered 2021-Dec-20 at 11:25I found the problem. The conda install fixed the GDAL problem. BUT. When installing requirements.txt, GDAL got installed a second time and this caused the error, since the normal pip install is not working properly with GDAL.
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Vulnerabilities
No vulnerabilities reported
Install pyserial
You can use pyserial like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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