from machine import ADC,Pin
from time import sleep
from math import exp

adc1=ADC(Pin(32))
adc1.width(ADC.WIDTH_9BIT)
adc1.atten(ADC.ATTN_11DB)
adc2=ADC(Pin(33))
adc2.width(ADC.WIDTH_9BIT)
adc2.atten(ADC.ATTN_11DB)

led=Pin(15,Pin.OUT)
train=Pin(23,Pin.IN,Pin.PULL_DOWN)
deseado=Pin(22,Pin.IN,Pin.PULL_DOWN)
w1=-4.051931
w2=-4.586523
bias=0.9298972
vel=-0.04222126

while(1):
    v1=adc1.read()/511
    v2=adc2.read()/511
    sumatoria=v1*w1+v2*w2+bias
    sig=1/(1+exp(-sumatoria))
    if sig>=0.5:
        led.on()
    else:
        led.off()
    if train.value()==1:
        error=deseado.value()-sig
        grad=error*sig*(1-sig)
        w1=w1+vel*grad*v1
        w2=w2+vel*grad*v2
        bias=bias+vel*grad

        print(w1,w2,bias,error)