Python Serial Api

Python Serial Api Rating: 4,0/5 1760 votes

Welcome to pySerial’s documentation¶. This module encapsulates the access for the serial port. It provides backends for Python running on Windows, OSX, Linux, BSD (possibly any POSIX compliant system) and IronPython. Full examples of using pySerial package closed. Blog post Serial RS232 connections in Python. I have not used pyserial but based on the API documentation at. In this Python API tutorial, we’ll learn how to retrieve data for data science projects. There are millions of APIs online which provide access to data. Websites like Reddit, Twitter, and Facebook all offer certain data through their APIs. To use an API, you make a request to a remote web server, and retrieve the data you need. Listing ports¶. Python-m serial.tools.listports will print a list of available ports. It is also possible to add a regexp as first argument and the list will only include entries that matched.

In this Python API tutorial, we’ll learn how to retrieve data for data science projects. There are millions of APIs online which provide access to data. Websites like Reddit, Twitter, and Facebook all offer certain data through their APIs. To use an API, you make a request to a. This module encapsulates the access for the serial port. It provides backends for Python running on Windows, OSX, Linux, BSD (possibly any POSIX compliant system) and IronPython. The module named “serial” automatically selects the appropriate backend. It is released under a free software license, see LICENSE for more details. Setting up Python to work with the serial port July 30, 2009 at 07:21 Tags Python, Serial port The serial port (a.k.a. COM-port, or RS232) is slowly disappearing from desktop and laptop computers, but it's still a very important tool for embedded engineers and people controlling equipment in general.

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Python Serial Port Extension

Project description

Python Serial Port Extension for Win32, OSX, Linux, BSD, Jython, IronPython

Stable:

  • Documentation: http://pythonhosted.org/pyserial/
  • Download Page: https://pypi.python.org/pypi/pyserial

Latest:

  • Documentation: http://pyserial.readthedocs.io/en/latest/
  • Project Homepage: https://github.com/pyserial/pyserial

Release historyRelease notifications

3.4

3.3

3.2.1

3.2

3.1.1

3.1

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3.0

2.7

2.6

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2.4

2.3

2.0

1.20

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The Python Arduino Command API is a light-weight Python library forcommunicating with Arduino microcontroller boards from a connected computer usingstandard serial IO, either over a physical wireor wirelessly. It is written using a custom protocol, similar to Firmata.

This allows a user to quickly protoype programs for Arduino using Python code, or tosimply read/control/troubleshoot/experimentwith harware connected to an Arduino board without ever having to recompile and reload sketches to the board itself.

Method names within the Python Arduino Command API are designed to be as closeas possible to their Arduino programming language counterparts

Simple usage example (LED blink)

Requirements:

  • Python 2.3 or higher (Python 3.x not yet tested, but would probably work)
  • pyserial 2.6 or higher
  • Any Arduino compatible microcontroller with at least 14KB of flash memory

Installation:

Either run pip install arduino-python from a command line, or run python setup.py build install from the source directory to install this library.

Pyserial

Setup:

  1. Verify that your Arduino board communicates at the baud rate specified in thesetup() function (line 348) in prototype.ino. Change it there if necessary.
  2. Load the prototype.ino sketch onto your Arduino board, using the Arduino IDE.
  3. Set up some kind of serial I/O communication between the Arduino board and your computer (via physical USB cable,bluetooth, xbee, etc + associated drivers)
  4. Add from Arduino import Arduino into your python script to communicate with your Arduino

For a collection of examples, see examples.py. This file contains methods which replicatethe functionality of many Arduino demo sketches.

Testing:

The tests directory contains some basic tests for the library. Extensive code coverage is a bit difficult to expect for every release, since a positive test involves actuallyconnecting and issuing commands to a live Arduino, hosting any hardwarerequired to test a particular function. But a core of basic communication testsshould at least be maintained here and used before merging into the master branch.

After installation, the interactive tests can be run from the source directory:

Automated tests can be run from the source directory with:

Classes

  • Arduino(baud) - Set up communication with currently connected and poweredArduino.

The device name / COM port of the connected Arduino will be auto-detected.If there are more than one Arduino boards connected,the desired COM port can be also be passed as an optional argument:

A time-out for reading from the Arduino can also be specified as an optionalargument:

Methods

Digital I/O

  • Arduino.digitalWrite(pin_number, state) turn digital pin on/off
  • Arduino.digitalRead(pin_number) read state of a digital pin
  • Arduino.pinMode(pin_number, io_mode) set pin I/O mode
  • Arduino.pulseIn(pin_number, state) measures a pulse
  • Arduino.pulseIn_set(pin_number, state) measures a pulse, with preconditioning

Analog I/O

Python Serial Api Name

  • Arduino.analogRead(pin_number) returns the analog value
  • Arduino.analogWrite(pin_number, value) sets the analog value

Shift Register

  • Arduino.shiftIn(dataPin, clockPin, bitOrder) shift a byte in and returns it
  • Arduino.shiftOut(dataPin, clockPin, bitOrder, value) shift the given byte out

bitOrder should be either 'MSBFIRST' or 'LSBFIRST'

Servo Library FunctionalitySupport is included for up to 8 servos.

  • Arduino.Servos.attach(pin, min=544, max=2400) Create servo instance. Only 8 servos can be used at one time.
  • Arduino.Servos.read(pin) Returns the angle of the servo attached to the specified pin
  • Arduino.Servos.write(pin, angle) Move an attached servo on a pin to a specified angle
  • Arduino.Servos.writeMicroseconds(pin, uS) Write a value in microseconds to the servo on a specified pin
  • Arduino.Servos.detach(pin) Detaches the servo on the specified pin

Software Serial Functionality

  • Arduino.SoftwareSerial.begin(ss_rxPin, ss_txPin, ss_device_baud) initialize software serial device onspecified pins.Only one sofware serial device can be used at a time. Existing software serial instance willbe be overwritten by calling this method, both in Python and on the arduino board.
  • Arduino.SoftwareSerial.write(data) send data using the arduino 'write' function to the existing softwareserial connection.
  • Arduino.SoftwareSerial.read() returns one byte from the existing software serial connection

EEPROM

Api
  • Arduino.EEPROM.read(address) reads a byte from the EEPROM
  • Arduino.EEPROM.write(address, value) writes a byte to the EEPROM
  • Arduino.EEPROM.size() returns size of the EEPROM

Python Serial Api Chart

Misc

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  • Arduino.close() closes serial connection to the Arduino.

Python Api Examples

To-do list:

  • Expand software serial functionality (print() and println())
  • Add simple reset functionality that zeros out all pin values
  • Add I2C / TWI function support (Arduino Wire.h commands)
  • Include a wizard which generates 'prototype.ino' with selected serial baud rate and Arduino function support(to help reduce memory requirements).
  • Multi-serial support for Arduino mega (Serial1.read(), etc)