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IR_Sensor.py
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IR_Sensor.py
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#This code was written by Dr. Julio Arauz, PhD and graduate student Riley Engle
#Edited by graduate student Christopher M Johnston
#at Ohio University in Athens, Ohio
from Adafruit_AMG88xx import Adafruit_AMG88xx
import math, time, sys
from scipy.interpolate import griddata
import numpy as np
def map(x, a, b, c, d):
return ((x-a) / ((b-a)*(d-c))) + c
def formatData(list, row):
i = 0
data = ""
while i < len(list[row]):
data = data + str(row) + ', '+str(i)+', '+str(list[row][i]) +'\n'
i+=1
return data
def average(pixels):
l = len(pixels)
t = 0
for x in pixels:
t = t+x
return float(t/l)
fn = '/var/www/html/data/pixels.csv' #File of output
sensor = Adafruit_AMG88xx()
MINTEMP = 22
MAXTEMP = 30
rangeMin = 0
rangeMax = 1
#size of new board
h = 64
w = 64
#8 is due to the number of pixels on board; 8x8 = 64 pixels
points = [(math.floor(ix / 8), (ix % 8)) for ix in range(0, 64)]
i = 0
go = 1
#Delay before getting next reading
refresh = 0.05
while go:
#Allow for Sensor to initialize
time.sleep(refresh)
#Get Pixel readings and map them for use with D3
pixels = sensor.readPixels()
pixels = [map(float(p), MINTEMP, MAXTEMP, rangeMin, rangeMax) for p in pixels]
#Write average temp to file
#Create Grid of specified size -TODO make variables???
xi, yi = np.mgrid[0:7:32j, 0:7:32j]
#Interpolate
bicubic = griddata(points, pixels, (xi,yi), method='cubic')
#Write Data
f = open(fn,'w')
f.write('x,y,value\n')
i=0
while i < len(bicubic):
data = formatData(bicubic,i)
f.write(data)
i+=1
f.close()