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ketCube_RxDisplayPlot.py
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ketCube_RxDisplayPlot.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
## @file rxDisplayPlot.py
#
# @author Jan Belohoubek
# @version 0.1
# @date 2018-05-07
# @brief Read data from the KETCube RxDisplay and show graph of values
#
# This script is intended for RxDisplay hex values produced by
# StarNetConcentrator module
#
# Received data are converted to 0 - 100 % of the defined range.
# The resulting relative value is plotted.
#
# First CALIB_CNT values are used for calibration.
# If you want to skip calibration, set CALIB_CNT to 0 and
# calib_min and calib_max to ẗheir respective values.
#
#
# @note LiveGraph HoWTo: https://pythonprogramming.net/live-graphs-matplotlib-tutorial/
#
# @attention
#
# <h2><center>© Copyright (c) 2018 University of West Bohemia in Pilsen
# All rights reserved.</center></h2>
#
# Developed by:
# The SmartCampus Team
# Department of Technologies and Measurement
# www.smartcampus.cz | www.zcu.cz
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”),
# to deal with the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the Software
# is furnished to do so, subject to the following conditions:
#
# - Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimers.
#
# - Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimers in the documentation
# and/or other materials provided with the distribution.
#
# - Neither the names of The SmartCampus Team, Department of Technologies and Measurement
# and Faculty of Electrical Engineering University of West Bohemia in Pilsen,
# nor the names of its contributors may be used to endorse or promote products
# derived from this Software without specific prior written permission.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
# OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
import sys
import serial
import serial.tools.list_ports
# Graphing ...
import matplotlib as mpl
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from matplotlib import style
import signal
# Debug ON/OFF
DEBUG=True
# Interpreter
TERMINAL="cmd" # bash or cmd
#List com ports?
COM_LIST=True
# Connection options
COM="COM0"
SPEED=9600
TIMEOUT=1000
# Parsing options -- bytes to parse
PARSED_MSB=1
PARSED_LSB=4
# Strings
if (TERMINAL == "bash"):
STR_ERROR= "\033[91m[ERROR]\033[0m "
STR_WARN = "\033[93m[WARNING]\033[0m "
STR_INFO = "[INFO] "
else:
STR_ERROR= "[ERROR] "
STR_WARN = "[WARNING] "
STR_INFO = "[INFO] "
# Graph options
POINT_CNT=10 # number of points in graph
points_arr = []
points_ptr = 0
points_sample = 0
for i in range(POINT_CNT):
points_arr.append((0,0))
# Correct exit
def exit_gracefully(signum, frame):
exit(0)
signal.signal(signal.SIGINT, exit_gracefully)
signal.signal(signal.SIGTERM, exit_gracefully)
# Calibration
CALIB_CNT=10 # number of points for calibration
calib_min = 0
calib_max = 0
calib_arr = []
calib_ptr = 0
for i in range(CALIB_CNT):
calib_arr.append((i,0))
mpl.rcParams['toolbar'] = 'None' # disable toolbar
style.use('fivethirtyeight')
LiveGraphFig = plt.figure()
LiveGraphPlot = LiveGraphFig.add_subplot(1,1,1)
# Graph animation
def liveGraphAnimation(i):
global DEBUG
global plt
global points_arr, points_ptr
global calib_arr, calib_ptr, calib_min, calib_max
# return when not calibrated yet
if (calib_ptr < CALIB_CNT):
return
xs = []
ys = []
for i in range(POINT_CNT):
xs.append(points_arr[(points_ptr + i) % POINT_CNT][0])
ys.append(points_arr[(points_ptr + i) % POINT_CNT][1])
LiveGraphPlot.clear()
LiveGraphPlot.plot(xs, ys)
plt.ylim((-5,105))
plt.title('Sensor data')
if (DEBUG == True):
print(STR_INFO + "Updating graph .. ")
# --- User input ---
if COM_LIST == True:
COM = ""
print("Available COM ports: ")
for p in serial.tools.list_ports.comports():
print(((p.description).decode('utf8')).encode('ascii',errors='ignore')+": "+((p.device).decode('utf8')).encode('ascii',errors='ignore'))
if 'TTL232R-3V3' in p.description:
COM=p.device
if 'USB Serial Port' in p.description:
COM=p.device
if COM == "":
print(STR_ERROR + "KETCube port not found! Connection FAILED!")
raw_input("Press ENTER to exit")
sys.exit(1)
COM = raw_input("Select COM port [" + COM + "]:") or str(COM)
# --- Start ---
if (DEBUG == True):
print(STR_INFO + "Connecting serial monitor: " + str(COM) + "; " + str(SPEED) + "; "+ str(TIMEOUT) + "!")
try:
with serial.Serial(COM, SPEED, timeout=TIMEOUT) as ser:
if (DEBUG == True):
print(STR_INFO + "Connected: " + str(COM) + "; " + str(SPEED) + "; "+ str(TIMEOUT) + "!")
# --- Init graph ---
GraphAni = animation.FuncAnimation(LiveGraphFig, liveGraphAnimation, interval=200)
plt.title('Calibration ...')
plt.pause(.001) # force graph update ...
while True:
line = ser.readline()
# --- PARSE DATA START ---
try:
if (line.find("rxDisplay ::") > 0):
parts = line.split(" ")
for sub in parts:
if (sub.find("DATA=") > 0):
data=sub.split("=")[1]
data=data.split("-")
decodedNumber = 0
shift = 8 * abs(PARSED_MSB - PARSED_LSB)
if (DEBUG == True):
print(STR_INFO + "Received data ALL : " + str(data))
for i in range(PARSED_MSB, PARSED_LSB+1):
decodedNumber = decodedNumber + (int(data[i],16) << shift)
shift = shift - 8
if (DEBUG == True):
print(STR_INFO + "Received data SELECTED: " + str(decodedNumber))
# store calib data
if (calib_ptr < CALIB_CNT):
calib_arr[calib_ptr] = decodedNumber
calib_ptr = calib_ptr + 1
break
elif (CALIB_CNT = 0):
calib_ptr = calib_ptr + 1
elif (calib_ptr == CALIB_CNT):
calib_min = min(calib_arr)
calib_max = max(calib_arr)
calib_ptr = calib_ptr + 1
if (DEBUG == True):
print(STR_INFO + "Calibrated data range: [" + str(calib_min) + ", " + str(calib_max) + "]")
if (abs(calib_max - calib_min) == 0):
print(STR_ERROR + "Calibration range invalid! REPEAT CALIBRATION!")
exit(0)
# place into array
normalized = 100.0* ((1.0 * abs(decodedNumber - calib_min))/(abs(calib_max - calib_min)))
normalized = max(normalized, 0)
normalized = min(normalized, 100)
points_arr[points_ptr] = (points_sample, normalized)
points_ptr = (points_ptr + 1) % POINT_CNT
points_sample = points_sample + 1
plt.pause(.001) # force graph update ...
break
except:
continue
# --- PARSE DATA END ---
except serial.SerialException as e:
print(STR_ERROR + "Connection to KETCube (" + str(COM) + ") FAILED! See trace:")
print(e)