def _messageHandler(self, *args, **kwargs):
'''
Calback method envoked by the firmata library. Handles the string message sent from the arduino.
Grabs the sensor data from the message and persists in the DB table.
:param args:
:param kwargs:
:return:
'''
readings = json.loads(util.two_byte_iter_to_str(args))
sky_temperature = readings['sky']
ambient_temperature = readings['ambient']
rain = readings['rain']
if self.should_persist_sensor_reading(sky_temperature,
ambient_temperature, rain):
conn = sqlite3.connect('weather_sensor.db')
c = conn.cursor()
print('inserting observation')
c.execute(
"INSERT INTO weather_sensor (rain,sky_temperature,ambient_temperature) VALUES (?,?,?)",
(rain, sky_temperature, ambient_temperature))
c.execute(
"DELETE FROM weather_sensor WHERE date_sensor_read <= date('now','-365 day')"
)
print('inserted')
# new_id = c.lastrowid
conn.commit()
self.last_rain_reading_saved = rain
self.last_sky_temperature_reading_saved = sky_temperature
self.last_ambient_temperature_reading_saved = ambient_temperature
self.last_reading_saved_time = time.time()
c.close()
def parseString(self, *args, **kwargs):
'''
Обработать полученную от Arduino-исполнителя строку.
Вызывается автоматически при получении строкового сообщения.
:returns: None
'''
received = ArduinoUtil.two_byte_iter_to_str(args)
self.receivedFirmataMessages.append(
self.FirmataStringResponse(received))
def test_two_byte_iter_to_str(self):
string, s = 'StandardFirmata', []
for i in string:
s.append(i)
s.append('\x00')
self.assertEqual(two_byte_iter_to_str(s), 'StandardFirmata')
def on_string_received(*args, **kwargs):
print(util.two_byte_iter_to_str(args)) # converts the incoming 2 byte data to character and then forms String
def test_two_byte_iter_to_str(self):
string, s = 'StandardFirmata', []
for i in string:
s.append(i)
s.append('\x00')
self.assertEqual(two_byte_iter_to_str(s), 'StandardFirmata')