Make dummy probe use tighter pattern for random readings

to make for a more reasonable-looking graph
This commit is contained in:
Lance Edgar 2018-10-20 04:17:42 -05:00
parent 44d012b3fd
commit 1f8507508a
2 changed files with 23 additions and 1 deletions

View file

@ -181,7 +181,18 @@ class TempmonClient(Daemon):
return therm_file.readlines()
def random_temp(self, probe):
temp = random.uniform(probe.critical_temp_min - 5, probe.critical_temp_max + 5)
last_reading = probe.last_reading()
if last_reading:
volatility = 2
# try to keep somewhat of a tight pattern, so graphs look reasonable
last_degrees = float(last_reading.degrees_f)
temp = random.uniform(last_degrees - volatility * 3, last_degrees + volatility * 3)
if temp > (probe.critical_temp_max + volatility * 2):
temp -= volatility
elif temp < (probe.critical_temp_min - volatility * 2):
temp += volatility
else:
temp = random.uniform(probe.critical_temp_min - 5, probe.critical_temp_max + 5)
return round(temp, 4)

View file

@ -297,6 +297,16 @@ class Probe(Base):
def __str__(self):
return self.description
def last_reading(self):
"""
Returns the reading which was taken most recently for this probe.
"""
session = orm.object_session(self)
return session.query(Reading)\
.filter(Reading.probe == self)\
.order_by(Reading.taken.desc())\
.first()
def start_status(self, status, time):
"""
Update the "started" timestamp field for the given status. This is
@ -413,6 +423,7 @@ class Reading(Base):
""",
backref=orm.backref(
'readings',
order_by='Reading.taken',
cascade='all, delete-orphan'))
taken = sa.Column(sa.DateTime(), nullable=False, default=datetime.datetime.utcnow)