from datetime import datetime, timedelta

class BaseSensorPost(object):
	def __init__(self, sq, sensor_type):
		self.last_values = [None,None]
		self.last_measurement = None
		self.last_insert = datetime.now()
		self.sq = sq
		self.heartbeat_interval = 15*60		
		self.sensor = sensor_type

	def insert_heartbeat(self, time_init, sensor):
		ins = self.sq['t']['heartbeats'].insert().values(
				when = time_init, what = sensor)
		self.sq['s'].execute(ins)