#!/usr/bin/env micropython
from machine import ADC, Pin
from time import sleep
from machine import RTC



photoPIN=26
led=Pin(13,Pin.OUT)
rtc=RTC()


def readLight(photoGP):
    photoRes=ADC(Pin(26))
    light=photoRes.read_u16()
    light=round(light/65535*100,2)
    return light

file=open('photoLog.txt','w')
while True:
    file.write("light: "+str(readLight(photoPIN))+"%"+ str(rtc.datetime())+"\n")
    file.flush()
    print("light: " + str(readLight(photoPIN)) +"%")
    print(rtc.datetime())
    sleep(900)