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sensor_wh1080rtlsdr.py
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###########################################################################
# Sint Wind PI
# Copyright 2012 by Tonino Tarsi <[email protected]>
#
# Please refer to the LICENSE file for conditions
# Visit http://www.vololiberomontecucco.it
#
##########################################################################
"""This module defines the WH1080_RTL-SDR sensor."""
import threading
import time
import config
import random
import datetime
import sqlite3
from TTLib import *
import TTLib
import sys
import subprocess
import globalvars
import meteodata
import sensor_thread
import sensor
import RPi.GPIO as GPIO
import TTLib
import thread
import os
import json
DEBUG = False
def log(message) :
print datetime.datetime.now().strftime("[%d/%m/%Y-%H:%M:%S]") , message
def modification_date(filename):
try:
t = os.path.getmtime(filename)
return datetime.datetime.fromtimestamp(t)
except:
return None
def getrevision():
# Extract board revision from cpuinfo file
myrevision = "0000"
try:
f = open('/proc/cpuinfo','r')
for line in f:
if line[0:8]=='Revision':
myrevision = line[11:-1]
f.close()
except:
myrevision = "0000"
return myrevision
class Sensor_WH1080RTLSDR(sensor.Sensor):
def __init__(self,cfg ):
ret = self.Detect()
if ( not ret ):
log("*************************************************************")
log("* *")
log("* ERROR : No RTL-SDR compatible USB DVB-T dongle found! *")
log("* SWPI execution aborted. *")
log("* *")
log("*************************************************************")
os.system("sudo ./killswpi.sh")
else:
log("RTL-SDR-compatible USB DVB-T dongle detected." )
time.sleep(5)
threading.Thread.__init__(self)
sensor.Sensor.__init__(self,cfg )
self.cfg = cfg
try:
os.remove('/dev/shm/wh1080-rtl_433.txt')
except:
log("Warning could not delete wh1080-rtl_433.txt file")
self.active = True
self.start()
def readfreq(self):
if self.cfg.rtlsdr_frequency == 433:
return '433920000'
elif self.cfg.rtlsdr_frequency == 868:
return '868200000'
elif self.cfg.rtlsdr_frequency == 915:
return '915000000'
def startRFListenig(self):
freq = (self.readfreq())
bdl = str(self.cfg.rtlsdr_bdl)
ppm = str(self.cfg.rtlsdr_ppm)
cmd = "/usr/local/bin/rtl_433 -q -f %s -R 32 -l %s -p %s > /dev/null" % (freq,bdl,ppm)
os.system(cmd)
def run(self):
freq = (self.readfreq())
bdl = str(self.cfg.rtlsdr_bdl)
ppm = str(self.cfg.rtlsdr_ppm)
myrevision = getrevision()
if myrevision == "0002" or myrevision == "0003" :
s = 1
else:
s = 2
log("Starting RF listening")
cmd = "/usr/local/bin/rtl_433 -q -f %s -R 32 -l %s -p %s > /dev/null" % (freq,bdl,ppm)
#cmd = "/usr/local/bin/rtlsdr -q -r '/swpi/gfile001.data' -R 32 -l 0 > /dev/null"
os.system(cmd)
log("Something went wrong with RF ... restarting")
def Detect(self):
p = subprocess.Popen("/usr/local/bin/rtl_eeprom",shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
(stdout, stderr) = p.communicate()
if stderr.find('Found') != -1:
return True
else:
return False
def ReadData(self):
with file('/dev/shm/wh1080-rtl_433.txt') as f:
data_file = f.read()
try:
line = json.loads(data_file)
if str(line['msg_type']) == '0':
try:
station_id = str(line['station_id'])
if ( station_id == "None" ):
return "None",0,0,0,0,"",0,0
temp = float(round(line['temperature'],1))
hum = (line['humidity'])
Wind_speed = (line['wind_speed'])*self.cfg.windspeed_gain + self.cfg.windspeed_offset
Gust_Speed = (line['wind_gust'])*self.cfg.windspeed_gain + self.cfg.windspeed_offset
dir_code = str(line['wind_dir_str'])
dire = float(line['wind_dir_deg'])
rain = (round(line['total_rain'],2))
#time_string = (line['time'])+".001"
except:
log("Error while decoding json data!")
elif str(line['msg_type']) == '1':
if str(self.cfg.rtlsdr_timesync) == 'True':
print "\n"
log("Setting system time...")
try:
t_year = str(line['year'])
t_month = str(line['month'])
if len(t_month) == 1:
t_month = "0" + t_month
t_day = str(line['day'])
if len(t_day) == 1:
t_day = "0" + t_day
t_hours = str(line['hours'])
if len(t_hours) == 1:
t_hours = "0" + t_hours
t_minutes = str(line['minutes'])
if len(t_minutes) == 1:
t_minutes = "0" + t_minutes
t_seconds = str(line['seconds'])
if len(t_seconds) == 1:
t_seconds = "0" + t_seconds
time_to_set = t_year + "-" + t_month + "-" + t_day + " " + t_hours + ":" + t_minutes + ":" + t_seconds
os.system("sudo date --s '%s'" % time_to_set)
log("System time adjusted from WH1080_RTL-SDR.")
return "Time",0,0,0,0,"",0,0
except:
log("Error adjusting system time from WH1080_RTL-SDR")
else:
log("WH1080_RTL-SDR: rtlsdr_timesync is disabled.")
return "Time",0,0,0,0,"",0,0
except:
log("Received data are not in json format. Dropped...")
return "None",0,0,0,0,"",0,0
return station_id,temp,hum,Wind_speed,Gust_Speed,dir_code,dire,rain
def GetData(self):
# get first good data
good_data = False
while ( not os.path.exists('/dev/shm/wh1080-rtl_433.txt') ):
if DEBUG: print "DEBUG - /dev/shm/wh1080-rtl_433.txt does not exist."
time.sleep(5)
while ( not good_data ):
station_id,temp,hum,Wind_speed,Gust_Speed,dir_code,dire,rain = self.ReadData()
if ( station_id != "None" and station_id != "Time"):
good_data = True
elif ( station_id == "Time"):
log("Datetime data received from WH1080_RTL-SDR. Waiting for weather data...")
time.sleep(48)
else:
log("Bad data received from WH1080_RTL-SDR")
time.sleep(48)
log("First data received from WH1080_RTL-SDR, station %s. Processing..." % station_id)
last_data_time = modification_date('/dev/shm/wh1080-rtl_433.txt')
while 1:
if ( station_id != "None" and station_id != "Time" ):
globalvars.meteo_data.status = 0
globalvars.meteo_data.last_measure_time = last_data_time
globalvars.meteo_data.idx = globalvars.meteo_data.last_measure_time
globalvars.meteo_data.hum_out = hum
globalvars.meteo_data.temp_out = temp
globalvars.meteo_data.wind_ave = Wind_speed
globalvars.meteo_data.wind_gust = Gust_Speed
globalvars.meteo_data.wind_dir = dire #*22.5
globalvars.meteo_data.wind_dir_code = dir_code
globalvars.meteo_data.rain = rain
sensor.Sensor.GetData(self)
tosleep = 50-(datetime.datetime.now()-last_data_time).seconds
if DEBUG: print "Sleeping ", tosleep
if (tosleep > 0 and tosleep < 50 ):
time.sleep(tosleep)
else:
time.sleep(50)
new_last_data_time = modification_date('/dev/shm/wh1080-rtl_433.txt')
while ( new_last_data_time == None or new_last_data_time == last_data_time):
time.sleep(10)
new_last_data_time = modification_date('/dev/shm/wh1080-rtl_433.txt')
if station_id != "Time":
log("New data received from WH1080_RTL-SDR station %s. Processing..." % station_id)
else:
log("Datetime signal received from WH1080_RTL-SDR station. Processing...")
last_data_time = new_last_data_time
station_id,temp,hum,Wind_speed,Gust_Speed,dir_code,dire,rain = self.ReadData()
if ( station_id == "Time"):
log("Sleeping while waiting for weather data...")
tosleep = 50-(datetime.datetime.now()-last_data_time).seconds
if DEBUG: print "Sleeping ", tosleep
if (tosleep > 0 and tosleep < 50 ):
time.sleep(tosleep)
else:
time.sleep(50)
if ( station_id == "None"):
log("Bad data received from WH1080_RTL-SDR")
if __name__ == '__main__':
configfile = 'swpi.cfg'
cfg = config.config(configfile)
globalvars.meteo_data = meteodata.MeteoData(cfg)
ss = Sensor_WH1080RTLSDR
while 1:
ss.GetData()