Syntax
In the Firmata section, we already learned how useful it is to use the Firmata protocol instead of constantly modifying the Arduino sketch and uploading it for simple programs. PySerial is a simple library that provides a bridge between Arduino and Python via a serial port, but it lacks any support for the Firmata protocol.
Parameters
parameter | details |
---|---|
port | Device name e.g. /dev/ttyUSB0 on GNU/Linux or COM3 on Windows. |
baudrate | baudrate type: int default: 9600 standard values: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200 |
- Today we will be installing PySerial 3.4 on Python 3.7.1. Python website: PySerial download: https://pypi.org/project/pyse.
- PySerial is a simple library that provides a bridge between Arduino and Python via a serial port, but it lacks any support for the Firmata protocol. As mentioned earlier, the biggest benefit of Python can be described in one sentence, 'There is a library for that.'
- Take a look at threaded/init.py and tools/miniterm.py as they ship with pyserial. The authors repeatedly use serial.read(self.serial.inwaiting or 1) which is a manual fix for the broken read semantics. So the pyserial authors know what proper read semantics should look like. But they simply don't care for fixing the read function.
Remarks
Check what serial ports are available on your machine
To get a list of available serial ports use
at a command prompt or
from the Python shell.
Initialize serial device
Read from serial port
Melodyne free full version mac. Initialize serial device
to read single byte from serial device
to read given number of bytes from the serial device
to read one line from serial device.
Python Serial Port
to read the data from serial device while something is being written over it.
PySerial is a library which provides support for serial connections ('RS-232') over a variety of different devices: old-style serial ports, Bluetooth dongles, infra-red ports, and so on. It also supports remote serial ports via RFC 2217 (since V2.5).
Projects using PySerial
- BitPim - crossplatform application to view and manipulate data on CDMA phones from LG, Samsung, Sanyo and other manufacturers.
- RFIDIOt - an open source python library for exploring RFID devices (see also 'RFID enabled e-passport skimming proof of concept code released (RFIDIOt)' and 'Code highlights e-passport eavesdropping risk')
- t616hack - a distribution providing access to the contacts, phonebook and messages on the Sony Ericsson T610/T616 and compatible mobile telephones
- jaraco.nxt - a package implementing low-level API communication with the LEGO Mindstorms NXT robot kit.
- Twisted - Uses pySerial to provide an asynchronous serial port transport which can be used like any other stream-oriented transport (eg TCP, SSL).
Alternatives
Bluetooth connections can also be handled using the socket module, provided that support for Bluetooth is present in the underlying operating system and has been compiled into the Python distribution being used.
Project Home Page
PySerial Sourceforge Homepage
Python Serial Vs Pyserial
CategoryDocumentation