Raspberry Pi Forums

Code: Select all

while (1):
 if GPIO.input(21):
  file = open("channel0.txt","a")
  channel1 = adc.read_adc(0, gain = GAIN)
  time.sleep (0.3)
  file.write(str(channel1)), file.write(","), file.write(str(tme))
# this is just the code to record my values from the ADC i am using when an external pushbutton is pressed of course. "tme" and "gain" have been set before the while loop, and then:
 def animate(i):
  graph_data = open("channel0.txt", "r").read()
  lines = graph_data.split('\n')
  xs = [ ]
  ys = [ ]
  for line in lines:
    if len(line) > 1:
       y, x = line.split (",")
       xs.append(x)
       ys.append(y)
   ax1.clear()
   ax1.plot(xs, ys)
ani = animation.FuncAnimation(fig, animate, interval = 500)
plt.show()

Code: Select all

# sqlgraph2.py
import MySQLdb
import time
import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import matplotlib.animation as animation
from matplotlib import style
style.use('ggplot')
fig = plt.figure()
ax1 = fig.add_subplot(1,1,1)


def read_from_db():
     bla bla bla 

def animate(i):
        
    read_from_db()
    plt.plot(dtg,b)
    plt.gca().xaxis.set_major_formatter(mdates.DateFormatter('%b %d   %H:%M'))
    plt.gcf().autofmt_xdate()
    plt.xlabel('Date and/or Time')
    plt.ylabel('Temp (*F)')
    plt.title('Shack Temperature')
    plt.legend()
   
ani = animation.FuncAnimation(fig, animate, interval=10000)
plt.show()