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serlogr.py
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serlogr.py
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# Noah Williams
"""
PROGRAM DESCRIPTION:
Read and log data from serial port, created for visualizing PID results.
TODO: Produce CSV file with data, filename as mmddyy_hhmmss.csv for reference.
GOALS:
1. Read in data from serial port
2. Log data to file
3. Plot data
NOTES:
ls /dev/tty.* to view all serial ports
"""
# Libraries
import serial
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
import csv
import time
# Constants
FILENAME = time.strftime("%m%d%y_%H%M%S") + '.csv'
SERIAL_PORT = '/dev/tty.usbmodem1101'
BAUD_RATE = 9600
TIMEOUT = 1
# Variables
timePoints = []
tmp102Data = []
pwmData = []
# Open serial port
def openPort():
try :
open_port = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=TIMEOUT)
print("Serial port is open")
return open_port
except serial.SerialException:
print("Serial port is not open -- Exiting program")
exit()
openPort = openPort()
def readData(debug=True):
data = openPort.readline().decode('utf-8').strip().split(',')
if len(data) == 3:
pwmData.append(float(data[0]))
tmp102Data.append(float(data[1]))
timePoints.append(float(data[2]))
if debug: print(data[0], data[1], data[2])
def update_plot(frame):
readData()
plt.cla() # Clear the plot
plt.plot(timePoints, tmp102Data)
# Plot PWM data
# plt.plot(timePoints, pwmData)
# Plot line at 28 degrees
plt.plot([timePoints[0], timePoints[-1]], [30, 30], 'r--')
plt.ylim(26, 32)
plt.xlabel('Time (s)')
plt.ylabel('Temperature (C)')
plt.title('Temperature vs Time')
fig, axs = plt.subplots()
animation = FuncAnimation(fig, update_plot, interval=50)
plt.show()