test-code/temp_DS18B20.py at master · LingBW/test-code · GitHub

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# -*- coding: utf-8 -*-
"""
Created on Thu Dec 31 09:32:13 2015

@author: bling
"""

import os, glob, time
import serial

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
    f = open(device_file, 'r')
    lines = f.readlines()
    f.close()
    return lines

def read_temp():
    lines = read_temp_raw()
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = float(temp_string) / 1000.0
        temp_f = temp_c * 9.0 / 5.0 + 32.0
        return temp_c, temp_f

while True:
    #print("temp C=%f\ttemp F=%f" % read_temp())
    time.sleep(300)

    mes = "%d000%d" % read_temp()
    #ser=serial.Serial('COM16', 9600) # in Windows
    ser=serial.Serial('/dev/ttyUSB0',9600) # linux
    #print 'Open serial port.'
    # send the data
    time.sleep(1)
    ser.writelines('\n')
    time.sleep(1)
    ser.writelines('\n')
    time.sleep(1)
    ser.writelines('yab'+'\n') # Force the given message to idle.
    time.sleep(60)
    ser.writelines('\n')
    time.sleep(1)
    ser.writelines('\n')
    time.sleep(1)
    #ser.writelines('ylb9'+meandepth+rangedepth+time_len+meantemp+sdeviatemp+'\n')
    ser.writelines('ylb9000'+mes+'\n')
    time.sleep(3)
    #print 'Sending data: '+meandepth+rangedepth+time_len+meantemp+sdeviatemp
    #print datetime.now()
    time.sleep(2) # 1100s 18 minutes
    ser.close() # close port
    time.sleep(900)