def testLocationByRSSI(self):
location = Point(1, 3)
self.assertAlmostEqual(
location.distance(self.beacon.location),
self.beacon.getDistanceByRSSI(self.beacon.getRSSI(location)),
1,
)
def getRSSI(
self,
location: Point,
scale: float = 1,
is_wall: bool = False,
noise: bool = False,
) -> float:
"""Calculate RSSI on given location
Args:
location (Location):
scale (float, optional): Floor scale. Defaults to 1.
is_wall (bool, optional): Is wall on a way. Defaults to False.
noise (bool, optional): Should noise be added to a signal. Defaults to False.
Returns:
float: RSSI in dB
"""
# Distance = 10 ^ ((Measured Power — RSSI) / (10 * N))
distance = location.distance(self.location, scale)
if is_wall:
n = self.n_wall
else:
n = self.n
signal_strength: float = -10 * n * math.log10(distance) + self.rssi_1
if noise:
signal_strength += np.random.normal(0, self.noise_var)
logging.debug(f"{self} for {location} RSSI: {signal_strength:4.2f}")
return signal_strength