wxPython speedmeter value
Posted: Sun Feb 01, 2015 6:49 pm
Hello All,
I am working on a non-OBD2 car dashboard project. I have been trying to get data, collected from hall and temperature sensors using a short python program into gauges or dials for a car dashboard. I plan outputting screen direct to HDMI
I thought of using JustGage but the consensus seemed to be this would be a bit slow for real time data. Not sure if this is true and whether it would be easier to import the data into a web page
So I decided to have a go with SpeedMeter and wxpython. I have modified the speedmeter demo to meet my need see below. I have read quite a bit about wxpython including the wxPython in action, but it is all a bit beyond my scope, especially the chapter about event driven environment. I think I need to do something with “event handling” maybe a wxPaintEvent in conjunction with a PyEventBinder?
In addition I have no idea how I get the data as it is collected in my python program into the data input of my SpeedMeter.
There doesn’t seem too much on the internet about SpeedMeter.
Any Ideas or pointers would be appreciated.
Regards
John
I show the python code for GPIO data collection (just the Hall sensors for simplicity) and rpm_data, mph_data, kph_data is the data I am trying to use as the value for the gauges. The code I have for the SpeedMeter dashboard display is the second list.
I am working on a non-OBD2 car dashboard project. I have been trying to get data, collected from hall and temperature sensors using a short python program into gauges or dials for a car dashboard. I plan outputting screen direct to HDMI
I thought of using JustGage but the consensus seemed to be this would be a bit slow for real time data. Not sure if this is true and whether it would be easier to import the data into a web page
So I decided to have a go with SpeedMeter and wxpython. I have modified the speedmeter demo to meet my need see below. I have read quite a bit about wxpython including the wxPython in action, but it is all a bit beyond my scope, especially the chapter about event driven environment. I think I need to do something with “event handling” maybe a wxPaintEvent in conjunction with a PyEventBinder?
In addition I have no idea how I get the data as it is collected in my python program into the data input of my SpeedMeter.
There doesn’t seem too much on the internet about SpeedMeter.
Any Ideas or pointers would be appreciated.
Regards
John
I show the python code for GPIO data collection (just the Hall sensors for simplicity) and rpm_data, mph_data, kph_data is the data I am trying to use as the value for the gauges. The code I have for the SpeedMeter dashboard display is the second list.
Code: Select all
# Two hall sensors simultaneous reading python2.7
import RPi.GPIO as GPIO
import sys
import time
import os
GPIO.setmode(GPIO.BCM)
# GPIO 22 & 17 set up as inputs, pulled up to avoid false detection.
GPIO.setup(22, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_UP)
def my_callback(channe1): # define two threaded callback functions
global count_rpm
count_rpm = count_rpm + 1
print "found 1 engine rev", count_rpm
def my_callback2(channel):
global count_mph
print "found 1 wheel rev", count_mph
count_mph = count_mph + 1
count_rpm = 1
count_mph = 1
SAMPLE_TM =2.0
next_sample = time.time() + SAMPLE_TM
GPIO.add_event_detect(17, GPIO.FALLING, callback=my_callback, bouncetime=10)
GPIO.add_event_detect(22, GPIO.FALLING, callback=my_callback2, bouncetime=10)
while True:
tm =time.time() #save to variable
if tm > next_sample:
rpm_data = count_rpm * 60 / (SAMPLE_TM)
count_rpm = 0
mph_data = count_mph *60 / (SAMPLE_TM)
kph_data = count_mph *60 / (SAMPLE_TM *0.621371192)
sys.stdout.write("\r RPM:{:0.0f} MPH:{:0.0f} KPH:{:0.0f} ".format(rpm_data, mph_data, kph_data))
sys.stdout.flush ()
# except KeyboardInterrupt:
GPIO.cleanup()
Code: Select all
# -*- coding: utf-8 -*-
import wx
import SpeedMeter as SM
from math import pi, sqrt
# This Is For Latin/Greek Symbols I Used In The Demo Only
wx.SetDefaultPyEncoding('iso8859-1')
# Beginning Of SPEEDMETER Demo wxPython Code
class SpeedMeterDemo(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, -1, "",
wx.DefaultPosition,
size=(400,400),
style=wx.DEFAULT_FRAME_STYLE |
wx.NO_FULL_REPAINT_ON_RESIZE)
#self.SetMenuBar(self.CreateMenuBar())
panel = wx.Panel(self, -1)
sizer = wx.FlexGridSizer(2, 3, 2, 5)
# 6 Panels To Hold The SpeedMeters ;-)
panel1 = wx.Panel(panel, -1)
panel2 = wx.Panel(panel, -1)
panel3 = wx.Panel(panel, -1)
panel4 = wx.Panel(panel, -1)
panel5 = wx.Panel(panel, -1)
panel6 = wx.Panel(panel, -1)
# First SpeedMeter: We Use The Following Styles:
self.SpeedWindow1 = SM.SpeedMeter(panel1,
extrastyle=SM.SM_DRAW_HAND |
#SM.SM_DRAW_SECTORS |
SM.SM_DRAW_SECONDARY_TICKS |
SM.SM_DRAW_MIDDLE_TEXT |
#SM.SM_DRAW_PARTIAL_FILLER |
SM.SM_ROTATE_TEXT
)
self.SpeedWindow1.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(0, 201, 20)
self.SpeedWindow1.SetIntervals(intervals)
colours = [wx.BLACK]*10
self.SpeedWindow1.SetIntervalColours(colours)
ticks = [str(interval) for interval in intervals]
self.SpeedWindow1.SetTicks(ticks)
self.SpeedWindow1.SetTicksColour(wx.WHITE)
self.SpeedWindow1.SetTicksFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL))
self.SpeedWindow1.SetNumberOfSecondaryTicks(4)
self.SpeedWindow1.SetHandColour(wx.Colour(255, 50, 0))
self.SpeedWindow1.SetSpeedBackground(wx.BLACK)
self.SpeedWindow1.SetHandColour(wx.WHITE)
self.SpeedWindow1.DrawExternalArc(False)
self.SpeedWindow1.SetMiddleText("KPH")
self.SpeedWindow1.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow1.SetMiddleTextFont(wx.Font(9, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow1.SetSpeedValue(5.6)
# Second SpeedMeter: We Use The Following Styles:
self.SpeedWindow2 = SM.SpeedMeter(panel5,
extrastyle=SM.SM_DRAW_HAND |
SM.SM_DRAW_SECTORS |
SM.SM_DRAW_MIDDLE_TEXT |
SM.SM_DRAW_MIDDLE_ICON,
mousestyle=SM.SM_MOUSE_TRACK
)
self.SpeedWindow2.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(0, 81, 10)
self.SpeedWindow2.SetIntervals(intervals)
colours = [wx.BLUE]*2
colours.extend([wx.BLACK]*5)
colours.append(wx.RED)
self.SpeedWindow2.SetIntervalColours(colours)
ticks = [str(interval) + "°" for interval in intervals]
self.SpeedWindow2.SetTicks(ticks)
self.SpeedWindow2.SetTicksColour(wx.WHITE)
self.SpeedWindow2.SetTicksFont(wx.Font(10, wx.TELETYPE, wx.NORMAL, wx.BOLD))
self.SpeedWindow2.SetMiddleText("INTAKE °C ")
self.SpeedWindow2.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow2.SetMiddleTextFont(wx.Font(9, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow2.SetHandColour(wx.WHITE)
# We Set The Background Colour Of The SpeedMeter OutSide The Control
self.SpeedWindow2.SetSpeedBackground(wx.BLACK)
self.SpeedWindow2.DrawExternalArc(False)
self.SpeedWindow2.SetHandColour(wx.WHITE)
# Define The Icon We Want
icon = wx.Icon("temp.ico", wx.BITMAP_TYPE_ICO)
icon.SetWidth(14)
icon.SetHeight(6)
# Draw The Icon In The Center Of SpeedMeter
self.SpeedWindow2.SetMiddleIcon(icon)
# Quite An High Fever!!!
self.SpeedWindow2.SetSpeedValue(80)
# Third SpeedMeter: We Use The Following Styles:
self.SpeedWindow3 = SM.SpeedMeter(panel4,
extrastyle=SM.SM_DRAW_HAND |
SM.SM_DRAW_SECTORS |
SM.SM_DRAW_MIDDLE_TEXT |
SM.SM_DRAW_MIDDLE_ICON,
mousestyle=SM.SM_MOUSE_TRACK
)
# We Want To Simulate Some Kind Of Thermometer (In Celsius Degrees!!!)
self.SpeedWindow3.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(20, 121, 10)
self.SpeedWindow3.SetIntervals(intervals)
colours = [wx.BLUE]*2
colours.extend([wx.BLACK]*7)
colours.append(wx.RED)
self.SpeedWindow3.SetIntervalColours(colours)
ticks = [str(interval) + "°" for interval in intervals]
self.SpeedWindow3.SetTicks(ticks)
self.SpeedWindow3.SetTicksColour(wx.WHITE)
self.SpeedWindow3.SetTicksFont(wx.Font(10, wx.TELETYPE, wx.NORMAL, wx.BOLD))
self.SpeedWindow3.SetHandColour(wx.WHITE)
self.SpeedWindow3.SetSpeedBackground(wx.BLACK)
self.SpeedWindow3.SetMiddleText("BLOCK °C")
self.SpeedWindow3.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow3.SetMiddleTextFont(wx.Font(9, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow3.DrawExternalArc(False)
self.SpeedWindow3.SetHandColour(wx.WHITE)
icon = wx.Icon("temp.ico", wx.BITMAP_TYPE_ICO)
icon.SetWidth(14)
icon.SetHeight(8)
self.SpeedWindow3.SetMiddleIcon(icon)
self.SpeedWindow3.SetSpeedValue(40)
# Fourth SpeedMeter: We Use The Following Styles:
# NOTE: We Use The Mouse Style mousestyle=SM_MOUSE_TRACK. In This Way, Mouse
self.SpeedWindow4 = SM.SpeedMeter(panel3,
extrastyle=SM.SM_DRAW_HAND |
SM.SM_DRAW_SECTORS |
SM.SM_DRAW_MIDDLE_TEXT |
SM.SM_DRAW_MIDDLE_ICON,
mousestyle=SM.SM_MOUSE_TRACK
)
self.SpeedWindow4.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(-5, 46, 5)
self.SpeedWindow4.SetIntervals(intervals)
colours = [wx.BLUE]*2
colours.extend([wx.BLACK]*7)
colours.append(wx.RED)
self.SpeedWindow4.SetIntervalColours(colours)
ticks = [str(interval) + "°" for interval in intervals]
self.SpeedWindow4.SetTicks(ticks)
self.SpeedWindow4.SetTicksColour(wx.WHITE)
self.SpeedWindow4.SetTicksFont(wx.Font(10, wx.TELETYPE, wx.NORMAL, wx.BOLD))
self.SpeedWindow4.SetHandColour(wx.WHITE)
self.SpeedWindow4.SetSpeedBackground(wx.BLACK)
self.SpeedWindow4.SetMiddleText("AIR °C")
self.SpeedWindow4.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow4.SetMiddleTextFont(wx.Font(8, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow4.DrawExternalArc(False)
self.SpeedWindow4.SetHandColour(wx.WHITE)
self.SpeedWindow4.SetShadowColour(wx.Colour(50, 50, 50))
icon = wx.Icon("temp.ico", wx.BITMAP_TYPE_ICO)
icon.SetWidth(12)
icon.SetHeight(8)
self.SpeedWindow4.SetMiddleIcon(icon)
self.SpeedWindow4.SetSpeedValue(40)
# Fifth SpeedMeter: We Use The Following Styles:
self.SpeedWindow5 = SM.SpeedMeter(panel2,
extrastyle=SM.SM_DRAW_HAND |
SM.SM_DRAW_SECTORS |
SM.SM_DRAW_SECONDARY_TICKS |
SM.SM_DRAW_MIDDLE_TEXT |
SM.SM_DRAW_PARTIAL_FILLER |
SM.SM_ROTATE_TEXT
)
self.SpeedWindow5.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(0, 61, 10)
self.SpeedWindow5.SetIntervals(intervals)
colours = [wx.BLACK]*4
colours.append(wx.Colour(128, 128, 128))
colours.append(wx.RED)
self.SpeedWindow5.SetIntervalColours(colours)
ticks = [str(interval) for interval in intervals]
self.SpeedWindow5.SetTicks(ticks)
self.SpeedWindow5.SetTicksColour(wx.WHITE)
self.SpeedWindow5.SetTicksFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL))
self.SpeedWindow5.SetNumberOfSecondaryTicks(4)
self.SpeedWindow5.SetHandColour(wx.Colour(255, 50, 0))
self.SpeedWindow5.SetArcColour(wx.BLUE)
self.SpeedWindow5.SetSpeedBackground(wx.BLACK)
self.SpeedWindow5.SetHandColour(wx.WHITE)
self.SpeedWindow5.DrawExternalArc(False)
self.SpeedWindow5.SetMiddleText("RPM x 100")
self.SpeedWindow5.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow5.SetMiddleTextFont(wx.Font(9, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow5.SetSpeedValue(5.6)
# Sixth SpeedMeter: That Is Complete And Complex Example.
# We Use The Following Styles:
#
# SM_DRAW_HAND: We Want To Draw The Hand (Arrow) Indicator
# SM_DRAW_PARTIAL_FILLER: The Region Passed By The Hand Indicator Is Highlighted
# With A Different Filling Colour
# SM_DRAW_MIDDLE_ICON: We Draw An Icon In The Center Of SpeedMeter
# SM_DRAW_GRADIENT: A Circular Colour Gradient Is Drawn Inside The SpeedMeter, To
# Give Some Kind Of Scenic Effect
# SM_DRAW_FANCY_TICKS: We Use wx.lib.
# SM_DRAW_SHADOW: A Shadow For The Hand Indicator Is Drawn
self.SpeedWindow6 = SM.SpeedMeter(panel6,
extrastyle=SM.SM_DRAW_HAND |
SM.SM_DRAW_SECTORS |
SM.SM_DRAW_MIDDLE_TEXT |
SM.SM_DRAW_MIDDLE_ICON,
mousestyle=SM.SM_MOUSE_TRACK
)
self.SpeedWindow6.SetAngleRange(-pi/6, 7*pi/6)
intervals = range(20, 121, 10)
self.SpeedWindow6.SetIntervals(intervals)
colours = [wx.BLUE]*2
colours.extend([wx.BLACK]*7)
colours.append(wx.RED)
self.SpeedWindow6.SetIntervalColours(colours)
ticks = [str(interval) + "°" for interval in intervals]
self.SpeedWindow6.SetTicks(ticks)
self.SpeedWindow6.SetTicksColour(wx.WHITE)
self.SpeedWindow6.SetTicksFont(wx.Font(10, wx.TELETYPE, wx.NORMAL, wx.BOLD))
self.SpeedWindow6.SetHandColour(wx.WHITE)
self.SpeedWindow6.SetSpeedBackground(wx.BLACK)
self.SpeedWindow6.SetArcColour(wx.BLUE)
self.SpeedWindow6.DrawExternalArc(False)
self.SpeedWindow6.SetHandColour(wx.WHITE)
self.SpeedWindow6.SetMiddleText("OIL °C")
self.SpeedWindow6.SetMiddleTextColour(wx.WHITE)
self.SpeedWindow6.SetMiddleTextFont(wx.Font(8, wx.SWISS, wx.NORMAL, wx.BOLD))
self.SpeedWindow6.SetMiddleIcon(icon)
self.SpeedWindow6.SetSpeedValue(40)
# End Of SpeedMeter Controls Construction. Add Some Functionality
# These Are Cosmetics For The First to 6th SpeedMeter Control
bsizer1 = wx.BoxSizer(wx.VERTICAL)
hsizer1 = wx.BoxSizer(wx.HORIZONTAL)
bsizer1.Add(self.SpeedWindow1, 1, wx.EXPAND)
bsizer1.Add(hsizer1, 0, wx.EXPAND)
panel1.SetSizer(bsizer1)
bsizer2 = wx.BoxSizer(wx.VERTICAL)
hsizer2 = wx.BoxSizer(wx.HORIZONTAL)
bsizer2.Add(self.SpeedWindow2, 1, wx.EXPAND)
bsizer2.Add(hsizer2, 0, wx.EXPAND)
panel2.SetSizer(bsizer2)
bsizer3 = wx.BoxSizer(wx.VERTICAL)
hsizer3 = wx.BoxSizer(wx.HORIZONTAL)
bsizer3.Add(self.SpeedWindow3, 1, wx.EXPAND)
bsizer3.Add(hsizer3, 0, wx.EXPAND)
panel3.SetSizer(bsizer3)
bsizer4 = wx.BoxSizer(wx.VERTICAL)
hsizer4 = wx.BoxSizer(wx.HORIZONTAL)
bsizer4.Add(self.SpeedWindow4, 1, wx.EXPAND)
bsizer4.Add(hsizer4, 0, wx.EXPAND)
panel4.SetSizer(bsizer4)
bsizer5 = wx.BoxSizer(wx.VERTICAL)
hsizer5 = wx.BoxSizer(wx.HORIZONTAL)
bsizer5.Add(self.SpeedWindow5, 1, wx.EXPAND)
bsizer5.Add(hsizer5, 0, wx.EXPAND)
panel5.SetSizer(bsizer5)
bsizer6 = wx.BoxSizer(wx.VERTICAL)
hsizer6 = wx.BoxSizer(wx.HORIZONTAL)
bsizer6.Add(self.SpeedWindow6, 1, wx.EXPAND)
bsizer6.Add(hsizer6, 0, wx.EXPAND)
panel6.SetSizer(bsizer6)
sizer.Add(panel1, 1, wx.EXPAND)
sizer.Add(panel2, 1, wx.EXPAND)
sizer.Add(panel3, 1, wx.EXPAND)
sizer.Add(panel4, 1, wx.EXPAND)
sizer.Add(panel5, 1, wx.EXPAND)
sizer.Add(panel6, 1, wx.EXPAND)
sizer.AddGrowableRow(0)
sizer.AddGrowableRow(1)
sizer.AddGrowableCol(0)
sizer.AddGrowableCol(1)
sizer.AddGrowableCol(2)
panel.SetSizer(sizer)
sizer.Layout()
if __name__ == "__main__":
app = wx.PySimpleApp()
frame = SpeedMeterDemo()
frame.Show()
frame.Maximize()
app.MainLoop()