X-Git-Url: http://git.smho.de/gw/?p=owSlave2.git;a=blobdiff_plain;f=tools%2FreadTempHum.py;fp=tools%2FreadTempHum.py;h=d129db68f28fe7970c9c4ad4b30f3700fc228a9e;hp=0000000000000000000000000000000000000000;hb=3608ace7dd5bd4fa5d7d49224ef770b21596092c;hpb=3f2aceaf525eeceff3baece206b2048bbf286c40

diff --git a/tools/readTempHum.py b/tools/readTempHum.py
new file mode 100644
index 0000000..d129db6
--- /dev/null
+++ b/tools/readTempHum.py
@@ -0,0 +1,125 @@
+#!/usr/bin/python
+# Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de
+# All rights reserved. 
+# 
+# Redistribution and use in source and binary forms, with or without 
+# modification, are permitted provided that the following conditions are 
+# met: 
+# 
+#  * Redistributions of source code must retain the above copyright 
+#    notice, this list of conditions and the following disclaimer. 
+#  * Redistributions in binary form must reproduce the above copyright 
+#    notice, this list of conditions and the following disclaimer in the 
+#    documentation and/or other materials provided with the 
+#    distribution. 
+#  * All advertising materials mentioning features or use of this 
+#    software must display the following acknowledgement: This product 
+#    includes software developed by tm3d.de and its contributors. 
+#  * Neither the name of tm3d.de nor the names of its contributors may 
+#    be used to endorse or promote products derived from this software 
+#    without specific prior written permission. 
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+
+
+
+
+import time
+import subprocess
+import sys
+
+def owcom(dev,send,rc):
+	res=[]
+	f=open("/sys/bus/w1/devices/%s/rw" %(dev),"r+b",0)
+	f.write("".join(map(chr, send)))
+	if (rc!=0):
+		res=map(ord,f.read(rc))
+	f.close()
+	return res
+		
+
+def crc8(arr):
+	lscrc=0x0;
+	for v in arr:
+		bit=1;
+		while bit<256:
+			if (v&bit)==bit:
+				lb=1
+			else:
+				lb=0
+			if (lscrc&1)!=lb:
+				lscrc=(lscrc>>1)^0x8c 
+			else:
+				lscrc=(lscrc>>1)
+			bit=bit*2
+	return lscrc
+	
+def testnr(s):
+	for c in s.lower()[:]:
+		if not((c) in ['0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f','-']):
+			return False
+	return True
+ 
+def addid(id,val):
+	for i in range(7):
+		id[i+1]=id[i+1]+val
+		if id[i+1]>254:
+			id[i+1]=id[i+1]-254
+			val=1
+		else:
+			return id
+	return id
+#
+
+def readDS18B20(s):
+	f=open("/sys/bus/w1/devices/%s/w1_slave" %(s),"rb",0)
+	res=f.read().split(" ")
+	f.close()
+	T=((int(res[0],16)+int(res[1],16)*256)/16.0)
+	print("Temperatur: %f °C" %(T));	
+
+def readDS2438(s):
+	owcom(s,[0x4E,0x00,0x01],0)
+	owcom(s,[0x44],0)
+	time.sleep(1)
+	owcom(s,[0xB4],0)
+	time.sleep(1)
+	owcom(s,[0xB8,0x00],0)
+	crc=1
+	while crc:
+		p=owcom(s,[0xBE,0x00],9)
+		crc=crc8(p)
+	#print (p)
+	T=((p[1]+p[2]*256)/256.0)
+	RH=(((p[3]+p[4]*256)/ 500.0 - 0.16) / 0.0062) / (1.0546 - 0.00216*T); 
+	print("Temperatur: %f °C" %(T));
+	print("Luftfeuchte: %f %%" %(RH));
+	
+
+
+l=subprocess.check_output("ls /sys/bus/w1/devices/", shell=True)
+dc=0
+dl=[]
+for g in  (l.split("\n")):
+	if len(g)>2:
+		if testnr(g[0:2]):
+			if (g[0:2]=="26"):
+				print dc,") ",g
+				readDS2438(g)
+				dl.append(g)
+				dc=dc+1
+			if (g[0:2]=="28"):
+				print dc,") ",g
+				readDS18B20(g)
+				dl.append(g)
+				dc=dc+1