reading onewire sensors

controller/config/copy__init__.py.example

@@ -15,5 +15,6 @@ CONTROLLER_ID = '120' # every controller must have a different one
 STATE_FILE = '/mnt/zoblakdata/controller_state'
 PICTURE_TRANSFER_FILE='/mnt/zoblakdata/picture_transfer_ready.jpg'
 PICTURE_INPUT_FILE='/mnt/zoblakdata/picture.jpg' # must match file in PICTURE_COMMAND
-PICTURE_COMMAND="""avconv -i rtsp://192.168.1.10:554//user=admin_password=_channel=1_stream=0.sdp -i /home/pi/projects/tfm/controller/zoblakLogo.png -filter_complex "[0:v]drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:fontsize=30:box=1:boxcolor=black@0.75:text='%d\.%m\.%Y\. %H\:%M\:%S':fontcolor=white@0.8: x=10: y=10[text]; [text][1:v]overlay=main_w-overlay_w-5:5 [filtered]" -map "[filtered]" -f image2 -vframes 1 /mnt/zoblakdata/picture.jpg""" # filename must match PICTURE_INPUT_FILE path
+PICTURE_COMMAND="""avconv -i rtsp://192.168.5.10:554//user=admin_password=_channel=1_stream=0.sdp -i /home/pi/projects/tfm/controller/zoblakLogo.png -filter_complex "[0:v]drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:fontsize=30:box=1:boxcolor=black@0.75:text='%d\.%m\.%Y\. %H\:%M\:%S':fontcolor=white@0.8: x=10: y=10[text]; [text][1:v]overlay=main_w-overlay_w-5:5 [filtered]" -map "[filtered]" -f image2 -vframes 1 /mnt/zoblakdata/picture.jpg""" # filename must match PICTURE_INPUT_FILE path
 PICTURE_URL = 'http://agrar.zoblak.com/api/v1.0/picture'
+ONE_WIRE_TERMO_SENSORS = ['/dev/sys/bus/w1/devices/xxx/w1_slave'] # xxx is a serial number

controller/drivers/onewire/__init__.py

@@ -0,0 +1,17 @@
+import re
+
+def read_one_thermo(filename):
+    NO_OF_DECIMALS = 3
+    textfile = open(filename, 'r')
+    filetext = textfile.read()
+    textfile.close()
+    matches = re.findall("t=(\d+)", filetext)
+    return int(matches[0][0:-NO_OF_DECIMALS]) + (int(matches[0][-NO_OF_DECIMALS:]) / 1000.0)
+
+def read_many_thermo(filenames):
+    result = []
+    for filename in list(filenames):
+        if filename is None:
+            continue
+        result.append(read_one_thermo(filename))
+    return result

controller/sensors.py

@@ -4,6 +4,7 @@ import requests
 import Adafruit_DHT
 import config
 import RPi.GPIO as GPIO
+import onewire
 
 # Try to read the state of GPIO_PIN_TANKLEVELx and GPIO_PIN_TANKFULL
 GPIO.setmode(GPIO.BCM)
@@ -42,6 +43,12 @@ stopPumpingAt = config.STOP_PUMPING_AT
 # to 15 times to get a sensor reading (waiting 2 seconds between each retry).
 humidity, temperature = Adafruit_DHT.read_retry(SENSOR_TYPE, config.GPIO_PIN_DHT)
 
+temperatures = []
+
+try:
+    temperatures = onewire.read_many_thermo(config.ONE_WIRE_TERMO_SENSORS)
+except:
+    print("onewire thermo error:", sys.exc_info()[0])
 
 # Un-comment the line below to convert the temperature to Fahrenheit.
 # temperature = temperature * 9/5.0 + 32
@@ -58,7 +65,8 @@ if tankFull is not None:
     #  "tankLevel3": "1" if tankLevel3 else "0",
      "tankLevel4": "1" if tankLevel4 else "0",
      "tankFull": "1" if tankFull else "0",
-    "startPumpingAt": startPumpingAt,"stopPumpingAt": stopPumpingAt,"controllerId": controller_id
+    "startPumpingAt": startPumpingAt,"stopPumpingAt": stopPumpingAt,"controllerId": controller_id,
+    "temperatures": temperatures
     })
     print 'Temp={0:0.1f}*C'.format(temperature)
     print 'Humidity={0:0.1f}%'.format(humidity)