Python with Serial Port
使用Python 抓取Serial Port非常簡單, 首先安裝pyserial.
pip install pyserial
請看如下代碼
import serial
COM_PORT = 'COM3'
BAUD_RATES = 115200
ser = serial.Serial(COM_PORT, BAUD_RATES)#initialized serial port
try:
while True:
while ser.in_waiting:#waiting for data receive
data_raw = ser.readline()
data = data_raw.decode()#default using utf-8
print('接收到的原始資料：', data_raw)
print('接收到的資料：', data)
except KeyboardInterrupt:
ser.close()
print('close')
完整程式碼
底下為Lora usb port的訊息取得完整碼
# -*- coding: utf-8 -*-
###########################################################################
## Authorized : Thomas Wu(mahaljsp@gmail.com)
###########################################################################
import wx
import wx.xrc
import serial
import threading
import time
from string_pic import *
from io import BytesIO
from PIL import Image
import base64
delay=0.2
COM_PORT = 'COM3'
BAUD_RATES = 115200
slots = [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32]
class MainFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, id=wx.ID_ANY, title=u"Dakong Lora Master Receiver", pos=wx.DefaultPosition,
size=wx.Size(794, 518), style=wx.DEFAULT_FRAME_STYLE | wx.MAXIMIZE | wx.TAB_TRAVERSAL)
self.SetSizeHints(wx.DefaultSize, wx.DefaultSize)
self.SetBackgroundColour(wx.Colour(196, 196, 255))
bSizer1 = wx.BoxSizer(wx.VERTICAL)
bSizer2 = wx.BoxSizer(wx.HORIZONTAL)
self.m_staticText1 = wx.StaticText(self, wx.ID_ANY, u"Port", wx.DefaultPosition, wx.DefaultSize, 0)
self.m_staticText1.Wrap(-1)
bSizer2.Add(self.m_staticText1, 0, wx.ALIGN_CENTER_VERTICAL | wx.ALL, 5)
cmbPortChoices = []
self.cmbPort = wx.ComboBox(self, wx.ID_ANY, wx.EmptyString, wx.DefaultPosition, wx.DefaultSize, cmbPortChoices,
0)
bSizer2.Add(self.cmbPort, 0, wx.ALL, 5)
self.m_staticText3 = wx.StaticText(self, wx.ID_ANY, u" Freq", wx.DefaultPosition, wx.DefaultSize, 0)
self.m_staticText3.Wrap(-1)
bSizer2.Add(self.m_staticText3, 0, wx.ALIGN_CENTER | wx.ALL, 5)
cmbFreqChoices = [u"923", u"924", u"925"]
self.cmbFreq = wx.ComboBox(self, wx.ID_ANY, wx.EmptyString, wx.DefaultPosition, wx.DefaultSize, cmbFreqChoices,
0)
bSizer2.Add(self.cmbFreq, 0, wx.ALL, 5)
self.m_staticText4 = wx.StaticText(self, wx.ID_ANY, u"MHz", wx.DefaultPosition, wx.DefaultSize, 0)
self.m_staticText4.Wrap(-1)
bSizer2.Add(self.m_staticText4, 0, wx.ALIGN_CENTER | wx.ALL, 5)
bSizer1.Add(bSizer2, 0, wx.ALIGN_CENTER, 5)
self.lblMsg = wx.TextCtrl(self, wx.ID_ANY, wx.EmptyString, wx.DefaultPosition, wx.DefaultSize,
wx.TE_MULTILINE | wx.TE_READONLY)
bSizer1.Add(self.lblMsg, 1, wx.ALL | wx.EXPAND, 5)
bSizer3 = wx.BoxSizer(wx.HORIZONTAL)
self.btnStart = wx.Button(self, wx.ID_ANY, u"Start", wx.DefaultPosition, wx.Size(-1, 50), 0)
bSizer3.Add(self.btnStart, 0, wx.ALL, 5)
self.btnStop = wx.Button(self, wx.ID_ANY, u"Stop", wx.DefaultPosition, wx.Size(-1, 50), 0)
bSizer3.Add(self.btnStop, 0, wx.ALL, 5)
bSizer1.Add(bSizer3, 0, wx.ALIGN_CENTER, 5)
self.m_staticText5 = wx.StaticText(self, wx.ID_ANY, u"Thomas Wu (mahaljsp@gmail.com) ", wx.DefaultPosition,
wx.Size(-1, 25), wx.ALIGN_RIGHT)
self.m_staticText5.Wrap(-1)
self.m_staticText5.SetFont(wx.Font(11, 70, 93, 90, False, wx.EmptyString))
self.m_staticText5.SetForegroundColour(wx.Colour(0, 100, 100))
self.m_staticText5.SetBackgroundColour(wx.Colour(240, 240, 240))
bSizer1.Add(self.m_staticText5, 0, wx.EXPAND, 5)
self.SetSizer(bSizer1)
self.Layout()
self.Centre(wx.BOTH)
self.Init()
def __del__(self):
pass
def Init(self):
self.runFlag=True;
pil=Image.open(BytesIO(base64.b64decode(lora_png)))
w, h=pil.size
img=wx.Image(w,h)
img.SetData(pil.convert("RGB").tobytes())
img.SetAlpha(pil.convert("RGBA").tobytes()[3::4])
bitmap=wx.Bitmap(img)
icon=wx.Icon()
icon.CopyFromBitmap(bitmap)
self.SetIcon(icon)
self.Bind(wx.EVT_BUTTON, self.OnStartClick, self.btnStart)
self.Bind(wx.EVT_BUTTON, self.OnStopClick, self.btnStop)
self.Bind(wx.EVT_CLOSE, self.OnClose)
ports = ['COM%s' % (i + 1) for i in range(256)]
coms=[]
for port in ports:
try:
s=serial.Serial(port)
s.close()
coms.append(port)
except:
pass
if len(coms)>0:
self.cmbPort.AppendItems(coms)
self.cmbPort.Select(0)
self.cmbFreq.Select(0)
self.btnStart.Enable(True)
self.btnStop.Enable(False)
def OnStartClick(self, event):
self.btnStart.Enable(False)
self.btnStop.Enable(True)
self.cmbFreq.Enable(False)
self.cmbPort.Enable(False)
self.log=""
self.runFlag=True
self.serial=serial.Serial(self.cmbPort.Value, BAUD_RATES)
if self.cmbFreq.Value=='923':
self.gateway=1
self.channel=923
elif self.cmbFreq.Value=='924':
self.gateway=2
self.channel = 924
else:
self.gateway=3
self.channel = 925
t1=threading.Thread(target=self.LoraRead)
t1.start()
t2=threading.Thread(target=self.LoraSetting)
t2.start()
def OnStopClick(self, event):
self.serial.write("LoraStartWork DISABLE\r".encode())
time.sleep(delay)
self.runFlag=False
self.serial.close()
self.btnStart.Enable(True)
self.btnStop.Enable(False)
self.cmbFreq.Enable(True)
self.cmbPort.Enable(True)
def LoraSetting(self):
try:
self.serial.write("LoraSetMyAddr {0} 0 0\r".format(self.gateway).encode())
time.sleep(delay)
self.serial.write("LoraSetChannelFreq 0 {0}\r".format(self.channel*1000000).encode())
time.sleep(delay)
self.serial.write("LoraSaveChannelFreq\r".encode())
time.sleep(delay)
for i in range(1, 33):
self.serial.write("LoraRemoveSlaveNode {0}\r".format(i).encode())
time.sleep(delay)
for slot in slots:
self.serial.write("LoraAddSlaveNode 0 {0} {1}\r".format(self.gateway, slot).encode())
time.sleep(delay)
for i, slot in enumerate(slots):
self.serial.write("LoraSetSlaveNodeSlot {0} {1}\r".format(i+1, slot).encode())
time.sleep(delay)
self.serial.write("LoraSaveSlaveNode {0}\r".format(i + 1).encode())
time.sleep(delay)
self.serial.write("LoraGetMyAddr\r".encode())
time.sleep(delay)
self.serial.write("LoraStartWork ENABLE\r".encode())
except:
pass
def LoraRead(self):
while self.runFlag:
while self.serial.in_waiting:
s=''
bytes=self.serial.readline()
for byte in bytes:
if byte >= 32 and byte <126:
s+='{0:c}'.format(byte)
elif byte!=10:
s+=' {0:X} '.format(byte)
self.log+=s+"\r\n"
wx.CallAfter(self.UpdateMsg)
print("close read")
def UpdateMsg(self):
self.lblMsg.SetLabelText(self.log)
self.lblMsg.SetInsertionPointEnd()
def OnClose(self, event):
self.runFlag = False
time.sleep(delay)
try:
self.serial.write("LoraStartWork DISABLE\r".encode())
time.sleep(delay)
self.serial.close()
except:
pass
app.ExitMainLoop()
app=wx.App()
frame=MainFrame(None)
frame.Show()
app.MainLoop()
pic2py.py
import base64
def pic2py(pics, py_name):
datas = []
for pic in pics:
image = open(pic, 'rb')
key = pic.replace('.', '_')
value = base64.b64encode(image.read()).decode()
image.close()
datas.append('{0} = "{1}"\n'.format(key, value))
f = open('{0}.py'.format(py_name), 'w+')
for data in datas:
f.write(data)
f.close()
if __name__ == '__main__':
pics = ["lora.png"]
pic2py(pics, 'string_pic')
todo