#!/usr/bin/python3

import busio
import digitalio
import board
import adafruit_mcp3xxx.mcp3008 as MCP
from adafruit_mcp3xxx.analog_in import AnalogIn

# create the spi bus
spi = busio.SPI(clock=board.SCK, MISO=board.MISO, MOSI=board.MOSI)

# create the cs (chip select)
cs = digitalio.DigitalInOut(board.D5)

# create the mcp object
mcp = MCP.MCP3008(spi, cs)

# create an analog input channel on pin 0
def ORP() :
  channel = AnalogIn(mcp, MCP.P0)
  Tension = channel.value*5.05/65535
  return Tension
    
### Programme ###

somme_ORP = 0

for i in range (0,100) :
	somme_ORP = somme_ORP + ORP()

ORP_f = somme_ORP/100

print (ORP_f)