Add envmon code

1 files changed, 13 insertions, 0 deletions

diff --git a/envmon/rrdlog.py b/envmon/rrdlog.py
new file mode 100644
index 0000000..4dd4708
--- /dev/null
+++ b/envmon/rrdlog.py
@@ -0,0 +1,13 @@
+import rrdtool
+import os
+
+class TempLog(object):
+	def __init__(self, name):
+		self.name = name
+		if not os.path.exists(self.name):
+			rrdtool.create(self.name, 'DS:temperature:GAUGE:600:U:U',
+				'RRA:AVERAGE:0.5:1:17280', # Keep 5min snapshots for the last two months
+				'RRA:AVERAGE:0.5:12:87660', # Keep 1h averages for 10 years (as if...)
+			)
+	def update(self, temperature):
+		rrdtool.update(self.name, 'N:%f' % temperature)