Implement the bluetooth messaging module of EV3 pybricks on normal python. Based on PyBluez
In the offical document of pybricks.messaging, it says:
An EV3 Brick can send information to another EV3 Brick using Bluetooth. This page shows you how to connect multiple bricks and how to write scripts to send messages between them.
...
Now you can also connect the EV3 brick and your computer, and let them send messages to each other.
This project is based on PyBluez. So you need to install it first.
pip install PyBluezThen you just need to simply copy these files to your 'lib/' directory.
It's almost like the usage of the offical module for micropython. Here's a example from the offical document (comments modified).
Server:
# Before running this program, make sure the client and server EV3 bricks or
# PC are paired using Bluetooth, but do NOT connect them. The program will
# take care of establishing the connection.
# The server must be started before the client!
from pybricks.messaging import BluetoothMailboxServer, TextMailbox
server = BluetoothMailboxServer()
mbox = TextMailbox('greeting', server)
# The server must be started before the client!
print('waiting for connection...')
server.wait_for_connection()
print('connected!')
# In this program, the server waits for the client to send the first message
# and then sends a reply.
mbox.wait()
print(mbox.read())
mbox.send('hello to you!')Client:
from pybricks.messaging import BluetoothMailboxClient, TextMailbox
# This is the name of the remote EV3 or PC we are connecting to.
SERVER = 'ev3dev'
client = BluetoothMailboxClient()
mbox = TextMailbox('greeting', client)
print('establishing connection...')
client.connect(SERVER)
print('connected!')
mbox.send('hello!')
mbox.wait()
print(mbox.read())Note: When you run it on your computer, it may fail with an OSError like this:
Traceback (most recent call last):
File "<Your Program>", line 1, in <module>
pybricks.messaging.BluetoothMailboxServer()
File "C:\Projects\fake-ev3-bluetooth\pybricks\messaging.py", line 251, in __init__
super(ThreadingRFCOMMServer, self).__init__(
File "C:\Projects\fake-ev3-bluetooth\pybricks\bluetooth.py", line 97, in __init__
self.socket.bind(server_address)
File "C:\Program Files\Python38\lib\site-packages\pybluez_win10-0.22-py3.8-win-amd64.egg\bluetooth\msbt.py", line 72, in bind
bt.bind (self._sockfd, addr, port)
OSError
The reason may be that you can't bind
BluetoothSocketon port 1 (default). To solve this problem, add this to both the client and server code before instancing theBluetoothMailboxServerorBluetoothMailboxClientclass:
import pybricks.messaging
pybricks.messaging.EV3_RFCOMM_CHANNEL = 20 # Modify the default port. Other port numbers should also work.For more usage, you can read the offical document.
Sorry for my bad English.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent