From 252068641357a34456e866e486542b02490eacbe Mon Sep 17 00:00:00 2001
From: root <root@beaglebone.local.sublab.org>
Date: Thu, 21 Jan 2016 08:47:52 +0000
Subject: intermediate code foo

---
 cethcan/cethcan.json       |  2 ++
 envmon/onewire-sysfs.py    | 45 +++++++++++++++++++++++++++++------------
 envmon/onewire2graphite.py | 50 ++++++++++++++++++++++++++++++----------------
 3 files changed, 67 insertions(+), 30 deletions(-)

diff --git a/cethcan/cethcan.json b/cethcan/cethcan.json
index 7aedf31..8998550 100644
--- a/cethcan/cethcan.json
+++ b/cethcan/cethcan.json
@@ -24,6 +24,8 @@
 			"dali.hacklab.east.inner",
 			"dali.hacklab.west.outer"
 		]}
+		{ "addr": 1100, "name": "dali.flur.wc" },
+		{ "addr": 1151, "name": "dali.werkstatt.doppel" },
 	],
 	"beans": [
 		{ "addr": 256, "name": "toilet.lock", "values": [ "open", "closed" ] },
diff --git a/envmon/onewire-sysfs.py b/envmon/onewire-sysfs.py
index c10e83f..d889768 100644
--- a/envmon/onewire-sysfs.py
+++ b/envmon/onewire-sysfs.py
@@ -7,6 +7,7 @@ import errno
 import re
 import sys
 import time
+import random
 
 class OnewireException(Exception):
 	pass
@@ -31,6 +32,9 @@ class SensorFacade(object):
 	def __init__(self, addr, name):
 		self._addr = addr
 		self._name = name
+		self._cached = None
+		self._cachets = None
+		self._backoff = None
 
 	def _path(self):
 		addr = self._addr.replace('.', '-').lower()
@@ -58,19 +62,34 @@ class SensorFacade(object):
 
 	@property
 	def temperature(self):
-		for i in range(2, 0,-1):
-			try:
-				rv = self.get_temperature()
-				if rv > 65 or rv < -25:
-					raise OutOfRange, (self._path(), rv)
-				return rv
-			except SensorNotPresent:
-				raise
-			except Exception, e:
-				if i == 1:
-					raise
-				sys.excepthook(*sys.exc_info())
-				time.sleep(0.5)
+		if self._cachets > time.time() - 50:
+			return self._cached
+		if self._backoff > time.time():
+			if self._cachets > time.time() - 250:
+				return self._cached
+			return None
+
+		try:
+			rv = self.get_temperature()
+			if rv > 65 or rv < -25:
+				raise OutOfRange, (self._path(), rv)
+			self._cached = rv
+			self._cachets = time.time()
+			self._backoff = None
+			print '\033[32m', self._name, 'read', self._cached, '\033[m'
+			return self._cached
+		except SensorNotPresent:
+			self._backoff = time.time() + 2 + random.expovariate(1./3.) * 2
+			print '\033[31m', self._name, 'SensorNotPresent back-off', self._backoff - time.time(), '\033[m'
+			if self._cachets > time.time() - 250:
+				return self._cached
+			raise
+		except OutOfRange:
+			self._backoff = time.time() + 15 + random.expovariate(1./4.) * 10
+			print '\033[33m', self._name, 'OutOfRange back-off', self._backoff - time.time(), '\033[m'
+			if self._cachets > time.time() - 250:
+				return self._cached
+			raise
 
 def sensor(name):
 	if name not in _sensors:
diff --git a/envmon/onewire2graphite.py b/envmon/onewire2graphite.py
index 46bc94e..4b7743e 100755
--- a/envmon/onewire2graphite.py
+++ b/envmon/onewire2graphite.py
@@ -6,27 +6,43 @@ import sys
 import onewire
 import socket
 
-CARBON_SERVER = 'sonar.local.sublab.org'
+CARBON_SERVER = '2a02:238:f02a:8e2f:1:67:7261:7068' # 'sonar.local.sublab.org'
 CARBON_PORT = 2003
 
-prefix = "envmon.beaglebone_local_sublab_org."
+prefix = "sublab.beaglebone.env."
 
-sock = socket.socket()
+sock = socket.socket(socket.AF_INET6)
 sock.connect((CARBON_SERVER, CARBON_PORT))
 
+sensors = onewire.sensors()
+sensobj = dict([(sensor, onewire.sensor(sensor)) for sensor in sensors])
+vals = {}
+
 while True:
-    message = ''
-    for sensor in onewire.sensors():
-        try:
-            message += "%s %f %d\n" % (prefix + sensor, onewire.sensor(sensor).temperature, time.time())
-        except onewire.SensorNotPresent, e:
-            print >>sys.stderr, 'SensorNotPresent:', str(e)
-        except Exception:
-            print >>sys.stderr, "On %s: Could not retrieve temperature for '%s':" % (
-                time.strftime('%a, %d %b %Y %T %z'), sensor)
-            sys.excepthook(*sys.exc_info())
-            print >>sys.stderr, '========================================'
-    if message:
-	print message
+    nextslot = time.time() + 65
+    nextslot = nextslot - (nextslot % 60)
+
+    while nextslot - time.time() > 5.0:
+        for sensor in sensors:
+            try:
+                vals.setdefault(sensor, None)
+                vals[sensor] = sensobj[sensor].temperature
+            except onewire.SensorNotPresent, e:
+                print >>sys.stderr, sensor, 'SensorNotPresent:', str(e)
+            except onewire.OutOfRange, e:
+                # print >>sys.stderr, sensor, 'OutOfRange:', str(e)
+                pass
+            except Exception:
+                print >>sys.stderr, "On %s: Could not retrieve temperature for '%s':" % (
+                    time.strftime('%a, %d %b %Y %T %z'), sensor)
+                sys.excepthook(*sys.exc_info())
+                print >>sys.stderr, '========================================'
+        time.sleep(0.5)
+
+    time.sleep(max(nextslot - time.time(), 0))
+    goodvals = [sensor for sensor in sensors if vals.get(sensor, None) is not None]
+    print '%d of %d sensors have data' % (len(goodvals), len(sensors))
+    message = ''.join(["%s %f %d\n" % (prefix + sensor, vals[sensor], nextslot) for sensor in goodvals])
+    if message != '':
+        # print message
         sock.sendall(message)
-    time.sleep(300-len(onewire.sensors()))
-- 
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