#
# hello.VEML6040.py
#
# VEML6040 color sensor hello-world
#    hello.VEML6040.py serial_port
#
# Neil Gershenfeld 11/22/20
#
# This work may be reproduced, modified, distributed,
# performed, and displayed for any purpose, but must
# acknowledge this project. Copyright is retained and
# must be preserved. The work is provided as is; no
# warranty is provided, and users accept all liability.
#

from tkinter import *
import serial

WINDOW = 600 # window size

def idle(parent,canvas):
   Temp = green = blue = white = 0
   #
   # read
   #
   ser.flush()
   while (1):
      reading = ser.readline()
      if (reading[0:6] == b'Temp: '): break
   Temp = float(reading[6:-1])
   print(Temp)

   while (1):
      reading = ser.readline()
      if (reading[0:6] == b' Fan: '): break
   green = float(reading[6:-1])
   if green == 1:
      status = "ON"
   elif green ==0:
      status ="OFF"
   print("status",status)

   canvas.itemconfigure("green",text="Fan: %s"%status)



   #
   # plot
   #
   sum = Temp+green+blue
   canvas.itemconfigure("Temp",text="Temp: %f"%Temp)
   x = float(.3*WINDOW + (.9-.3)*WINDOW*(Temp/sum))
   canvas.coords('Temp1',.3*WINDOW,.05*WINDOW,x,.2*WINDOW)
   canvas.coords('Temp2',x,.05*WINDOW,.9*WINDOW,.2*WINDOW)

   #
   # update
   #
   canvas.update()
   parent.after_idle(idle,parent,canvas)

#
#  check command line arguments
#

port = "COM5"
#
# open serial port
#
ser = serial.Serial(port,4800)
ser.setDTR()
#
# set up GUI
#
root = Tk()
root.title('hello.VEML6040.py (q to exit)')
root.bind('q','exit')
canvas = Canvas(root, width=WINDOW, height=.85*WINDOW, background='white')
#
canvas.create_text(.025*WINDOW,.15*WINDOW,text="1",font=("Helvetica", 22),tags="Temp",fill="#000000",anchor=SW)
canvas.create_rectangle(.3*WINDOW,.05*WINDOW,.4*WINDOW,.2*WINDOW, tags='Temp1', fill='#b00000')
canvas.create_rectangle(.4*WINDOW,.05*WINDOW,.9*WINDOW,.2*WINDOW, tags='Temp2', fill='#000000')

canvas.create_text(.025*WINDOW,.35*WINDOW,text="1",font=("Helvetica", 22),tags="green",fill="#000000",anchor=SW)

#
canvas.pack()
#
# start idle loop
#
root.after(100,idle,root,canvas)
root.mainloop()