Skip to content
Permalink
master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
from w1thermsensor import W1ThermSensor
import rrdtool
import os.path
DATABASE_PATH = '/home/pi/'
LAST_DAY_GRAPH_FILE = '/home/pi/current.png'
COLORS = ('#AA3939', '#226666', '#AA6C39', '#2D882D')
SENSOR_NAMES = {
'0000075f24dc': 'Living room'
}
def sensor_name(id):
if SENSOR_NAMES.has_key(id):
return SENSOR_NAMES[id]
else:
return id
def create_rrd_unless_exists(filename):
if os.path.isfile(filename):
return
print("Creating RRD database file %s" % filename)
rrdtool.create(
filename,
'--step', '300',
'DS:temp:GAUGE:900:-100:100',
'RRA:AVERAGE:0.5:2:525600'
)
def graph_last_day(sensors):
defs = []
lines = []
current_temps = ['COMMENT: \l']
for i, sensor in enumerate(sorted(W1ThermSensor.get_available_sensors(),
key=lambda sensor: sensor.id)):
color = COLORS[i % len(COLORS)];
defs.append('DEF:' + sensor.id + '=' +
DATABASE_PATH + sensor.id + '.rrd:temp:AVERAGE')
lines.append('LINE1:' + sensor.id + color + ':' + sensor_name(sensor.id))
current_temps.append('GPRINT:' + sensor.id +
':LAST:' + sensor_name(sensor.id) + '\: %4.2lf\l')
params = [
LAST_DAY_GRAPH_FILE,
'-a', 'PNG',
'-w', '500',
'-h', '250',
'--start', '-86400',
'--end', 'now',
'--lower-limit', '18',
'--upper-limit', '28',
'--rigid',
'--vertical-label', 'Temp, deg C'] + defs + lines + current_temps
rrdtool.graph(*params)
for sensor in W1ThermSensor.get_available_sensors():
filename = sensor.id + '.rrd'
create_rrd_unless_exists(filename)
error = rrdtool.update(filename, 'N:%.2f' % (sensor.get_temperature()))
print("Sensor %s has temperature %.2f" % (sensor.id, sensor.get_temperature()))
graph_last_day(W1ThermSensor.get_available_sensors())