#!/usr/bin/env python
# -*- coding: utf-8 -*-
import serial
import sys
from time import sleep
port = '/dev/ttyAMA0'
baud = 9600
serial_connection = serial.Serial(port=port, baudrate=baud)
sleep(0.2)
while True:
    try:
        serial_connection.write('a--A00READ--')
        sleep(0.2)
        rawdata = serial_connection.read(12)
        value = rawdata[7:]
        value = value.strip('-')
        print value
        with open("values.txt", "a") as f:
            f.write(value +"\n")
        sleep (3)
    except KeyboardInterrupt:
        sys.exit(0)