"""Drawing a real-time chart using command-response mode"""
import os
from time import sleep
import matplotlib.pyplot as plt
from opendaq import DAQ
# Change here the serial port in which the openDAQ is connected
port = '/dev/ttyUSB0' if os.name == 'posix' else 'COM3'
# Connect to the device
daq = DAQ(port)
daq.conf_adc(8) # Reading in AN8
daq.read_adc()
period = 0.05
# Initiate plot:
fig = plt.figure()
plt.ion()
plt.show()
# initiate lists
t = []
data = []
for i in range(50):
try:
daq.set_analog(i / 50.0 + .5) # we will plot a ramp line
