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https://github.com/mrjohannchang/aioserial.py
pyserial-asyncio for humans.
https://github.com/mrjohannchang/aioserial.py
asynchronous asyncio library python serial
Last synced: 8 days ago
JSON representation
pyserial-asyncio for humans.
- Host: GitHub
- URL: https://github.com/mrjohannchang/aioserial.py
- Owner: mrjohannchang
- License: mpl-2.0
- Created: 2018-09-17T05:56:02.000Z (about 6 years ago)
- Default Branch: main
- Last Pushed: 2022-07-25T02:18:02.000Z (over 2 years ago)
- Last Synced: 2024-08-04T00:05:10.297Z (3 months ago)
- Topics: asynchronous, asyncio, library, python, serial
- Language: Python
- Homepage: https://pypi.org/project/aioserial/
- Size: 45.9 KB
- Stars: 130
- Watchers: 11
- Forks: 14
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-asyncio - aioserial - A drop-in replacement of [pySerial](https://github.com/pyserial/pyserial). (Misc)
README
# aioserial
* [Quick start](#quick-start)
+ [A simple serial port reader](#a-simple-serial-port-reader)
+ [pyserial-asyncio example replacement](#pyserial-asyncio-example-replacement)
* [API](#api)
+ [AioSerial](#aioserial)
- [Constructor](#constructor)
- [Methods](#methods)
* [read_async](#read-async)
* [read_until_async](#read-until-async)
* [readinto_async](#readinto-async)
* [readline_async](#readline-async)
* [readlines_async](#readlines-async)
* [write_async](#write-async)
* [writelines_async](#writelines-async)
+ [Other APIs](#other-apis)
* [Why aioserial?](#why-aioserial-)
A Python package that combines [asyncio](https://docs.python.org/3/library/asyncio.html) and [pySerial](https://pypi.org/project/pyserial/).
## Quick start
### A simple serial port reader
```py
import asyncio
import aioserial
async def read_and_print(aioserial_instance: aioserial.AioSerial):
while True:
print((await aioserial_instance.read_async()).decode(errors='ignore'), end='', flush=True)
asyncio.run(read_and_print(aioserial.AioSerial(port='COM1')))
```
### pyserial-asyncio example replacement
**The example usage from pyserial-asyncio**
https://pyserial-asyncio.readthedocs.io/en/latest/shortintro.html
```py
import asyncio
import serial_asyncio
class Output(asyncio.Protocol):
def connection_made(self, transport):
self.transport = transport
print('port opened', transport)
transport.serial.rts = False # You can manipulate Serial object via transport
transport.write(b'Hello, World!\n') # Write serial data via transport
def data_received(self, data):
print('data received', repr(data))
if b'\n' in data:
self.transport.close()
def connection_lost(self, exc):
print('port closed')
self.transport.loop.stop()
def pause_writing(self):
print('pause writing')
print(self.transport.get_write_buffer_size())
def resume_writing(self):
print(self.transport.get_write_buffer_size())
print('resume writing')
loop = asyncio.get_event_loop()
coro = serial_asyncio.create_serial_connection(loop, Output, '/dev/ttyUSB0', baudrate=115200)
loop.run_until_complete(coro)
loop.run_forever()
loop.close()
```
**aioserial equivalence**
```py
import asyncio
import aioserial
async def read_and_print(aioserial_instance: aioserial.AioSerial):
while True:
data: bytes = await aioserial_instance.read_async()
print(data.decode(errors='ignore'), end='', flush=True)
if b'\n' in data:
aioserial_instance.close()
break
aioserial_instance: aioserial.AioSerial = aioserial.AioSerial(port='/dev/ttyUSB0', baudrate=115200)
asyncio.run(asyncio.gather(read_and_print(aioserial_instance), aioserial_instance.write_async(b'Hello, World!\n')))
```
## API
### AioSerial
```py
>>> import aioserial
>>> import serial
>>> isinstance(aioserial.AioSerial(), serial.Serial)
True
>>> issubclass(aioserial.AioSerial, serial.Serial)
True
>>> aioserial.Serial is serial.Serial
True
```
#### Constructor
```py
aioserial_instance: aioserial.AioSerial = aioserial.AioSerial(
# ... same with what can be passed to serial.Serial ...,
loop: Optional[asyncio.AbstractEventLoop] = None,
cancel_read_timeout: int = 1,
cancel_write_timeout: int = 1)
```
#### Methods
##### read_async
```py
bytes_read: bytes = \
await aioserial_instance.read_async(size: int = 1)
```
##### read_until_async
```py
at_most_certain_size_of_bytes_read: bytes = \
await aioserial_instance.read_until_async(
expected: bytes = aioserial.LF, size: Optional[int] = None)
```
##### readinto_async
```py
number_of_byte_read: int = \
await aioserial_instance.readinto_async(b: Union[array.array, bytearray])
```
##### readline_async
```py
a_line_of_at_most_certain_size_of_bytes_read: bytes = \
await aioserial_instance.readline_async(size: int = -1)
```
##### readlines_async
```py
lines_of_at_most_certain_size_of_bytes_read: bytes = \
await aioserial_instance.readlines_async(hint: int = -1)
```
##### write_async
```py
number_of_byte_like_data_written: int = \
await aioserial_instance.write_async(bytes_like_data)
```
##### writelines_async
```py
number_of_byte_like_data_in_the_given_list_written: int = \
await aioserial_instance.writelines_async(list_of_bytes_like_data)
```
### Other APIs
All the other APIs in the mother package [pySerial](https://pypi.org/project/pyserial/) are supported in aioserial as-is.
## Why aioserial?
* Want to use an asyncio-based but not a (self-built) thread-based serial library.
* [pySerial-asyncio](https://pypi.org/project/pyserial-asyncio/) does [not support Windows](https://github.com/pyserial/pyserial-asyncio/issues/3).
* APIs in all the other packages ([pySerial-asyncio](https://pypi.org/project/pyserial-asyncio/),
[asyncserial](https://pypi.org/project/asyncserial/)) that target the same goal are not designed in high level.