Capture frames from Lepton camera using PyLepton and serialize the data and transmit it over web socket protocol

lepton_data_service.py

class ThermalDataHandler(WebSocketHandler):
    clients = []
    DEBUG = False

    def __init__(self, application, request, **kwargs):
        super(ThermalDataHandler, self).__init__(application, request, **kwargs)
        if not ThermalDataHandler.DEBUG:
            self.lepton = Lepton("/dev/spidev0.0")
            self.lepton.__enter__()
        self.mock_samples = MockData()

    def check_origin(self, origin):
        return True

    def open(self):
        if self not in ThermalDataHandler.clients:
            self.write_message("ACK")
            ThermalDataHandler.clients.append(self)

    def on_close(self):
        if self in ThermalDataHandler.clients:
            ThermalDataHandler.clients.remove(self)

    def on_message(self, message):
        self.write_message(self._get_data())

    def _get_data(self):
        if ThermalDataHandler.DEBUG:
            raw_frame = self.mock_samples.get_next_sample()
        else:
            raw_frame, _ = self.lepton.capture()
            raw_frame.astype(np.uint16)
        return json.dumps(raw_frame.tolist())