from machine import Pin,ADC
from utime import sleep
from math import log

Beta = 3950
sensor=ADC(Pin(26))
seg7a= [Pin(0,Pin.OUT),Pin(1,Pin.OUT),Pin(2,Pin.OUT),
        Pin(3,Pin.OUT),Pin(4,Pin.OUT),Pin(5,Pin.OUT),
        Pin(6,Pin.OUT),Pin(7,Pin.OUT)]     #abcdefgh

seg7b= [Pin(8,Pin.OUT),Pin(9,Pin.OUT),Pin(10,Pin.OUT),
        Pin(11,Pin.OUT),Pin(12,Pin.OUT),Pin(13,Pin.OUT),
        Pin(14,Pin.OUT),Pin(15,Pin.OUT)]   #abcdefgh

            #0                #1               #2
pat7=[[1,1,1,1,1,1,0,0],[0,1,1,0,0,0,0,0],[1,1,0,1,1,0,1,0],
            #3                #4               #5
     [1,1,1,1,0,0,1,0],[0,1,1,0,0,1,1,0],[1,0,1,1,0,1,1,0],
            #6                #7               #8
     [1,0,1,1,1,1,1,0],[1,1,1,0,0,0,0,0],[1,1,1,1,1,1,1,0],
            #9
     [1,1,1,1,0,1,1,0]]

def display7(value):
    value = max(value,0)
    a=int(value%10)
    b=int(value/10)
    for i in range(8):
        seg7a[i].value((pat7[a][i]))
        seg7b[i].value((pat7[b][i]))

while 1:
    val=sensor.read_u16()
    voltage=val/65535*3.3
    celcius = 1/(log(1/(65535.00/val-1))/Beta+1.0/298.15)-273.15;
    print("temperature",celcius,"^C")

    i=int(celcius)
    display7(i)
    sleep(0.4)