Example #1
0
def read_lora_message():
    global last_heartbeat
    print("Calling receiveLoRaMessage to receive message...")
    msg0 = lora_interface.receiveLoRaMessage(receive_timeout)
    msg = msg0  # Copy the message safely.
    status = lora_interface.getLoRaStatus()
    print("Msg: " + msg + ", Status: " + str(status))
    write_packet()
    gateway_snr = lora_interface.getLoRaSNRValue()
    gateway_rssi = lora_interface.getLoRaRSSIValue()
    gateway_rssi_packet = lora_interface.getLoRaRSSIpacketValue()

    # If no message available, try again.
    if len(msg) == 0:
        # Send a heartbeat message if it was last sent 10 mins ago.
        if (datetime.datetime.now() -
                last_heartbeat).total_seconds() < 10 * 60:
            return None
        last_heartbeat = datetime.datetime.now()
        device_state = {
            "message": "heartbeat",
            "address": gateway_address,
            "gateway": gateway_address,
            "gateway_snr": gateway_snr,
            "gateway_rssi": gateway_rssi,
            "gateway_rssi_packet": gateway_rssi_packet
        }
        return device_state

    device_address = lora_interface.getLoRaSender()
    recipient_address = lora_interface.getLoRaRecipient()
    packet_number = lora_interface.getLoRaPacketNumber()
    device_state = {
        "address": device_address,
        "gateway": recipient_address,
        "packet_number": packet_number,
        "gateway_snr": gateway_snr,
        "gateway_rssi": gateway_rssi,
        "gateway_rssi_packet": gateway_rssi_packet
    }
    try:
        # Msg contains an array of sensor data. Convert to dictionary.
        msg_split = msg.split("|")
        col = 0
        for value in msg_split:
            key = fields[col]
            col = col + 1
            value = value.strip()
            if value == "":
                continue  # Allow "||" to denote skipping of fields.

            # If field is integer or decimal, convert accordingly.
            if key != "timestamp" and value.isdecimal():
                if '.' in value: value = float(value)
                else: value = int(value)
            device_state[key] = value
    except Exception as e:
        # In case of parse errors e.g. due to Low Data Rate Optimization, record the error and continue.
        device_state["error"] = str(e)
    return device_state
Example #2
0
def read_lora_message():
    global last_heartbeat
    print("Calling receiveLoRaMessage to receive message...")
    msg0 = lora_interface.receiveLoRaMessage(receive_timeout)
    msg = msg0  # Copy the message safely.
    status = lora_interface.getLoRaStatus()
    print("Msg: " + msg + ", Status: " + str(status))
    write_packet()
    gateway_snr = lora_interface.getLoRaSNRValue()
    gateway_rssi = lora_interface.getLoRaRSSIValue()
    gateway_rssi_packet = lora_interface.getLoRaRSSIpacketValue()

    # If no message available, try again.
    if len(msg) == 0:
        # Send a heartbeat message if it was last sent 10 mins ago.
        if (datetime.datetime.now() - last_heartbeat).total_seconds() < 10 * 60:
            return None
        last_heartbeat = datetime.datetime.now()
        device_state = {
            "message": "heartbeat",
            "address": gateway_address,
            "gateway": gateway_address,
            "gateway_snr": gateway_snr,
            "gateway_rssi": gateway_rssi,
            "gateway_rssi_packet": gateway_rssi_packet
        }
        return device_state

    device_address = lora_interface.getLoRaSender()
    recipient_address = lora_interface.getLoRaRecipient()
    packet_number = lora_interface.getLoRaPacketNumber()
    device_state = {
        "address": device_address,
        "gateway": recipient_address,
        "packet_number": packet_number,
        "gateway_snr": gateway_snr,
        "gateway_rssi": gateway_rssi,
        "gateway_rssi_packet": gateway_rssi_packet
    }
    try:
        # Msg contains an array of sensor data. Convert to dictionary.
        msg_split = msg.split("|")
        col = 0
        for value in msg_split:
            key = fields[col]
            col = col + 1
            value = value.strip()
            if value == "": continue  # Allow "||" to denote skipping of fields.

            # If field is integer or decimal, convert accordingly.
            if key != "timestamp" and value.isdecimal():
                if '.' in value: value = float(value)
                else: value = int(value)
            device_state[key] = value
    except Exception as e:
        # In case of parse errors e.g. due to Low Data Rate Optimization, record the error and continue.
        device_state["error"] = str(e)
    return device_state
Example #3
0
loop_delay = 10

device_address = 2  # My own address.
gateway_address = 1  # Address of gateway.

print("Calling setupLoRa...")
status = lora_interface.setupLoRa(device_address, transmission_mode, transmission_channel, transmission_power)
print("Status: " + str(status))

# Loop forever.
while True:
    try:
        # Wait a while to receive a message.
        print("Calling receiveLoRaMessage to receive message...")
        msg = lora_interface.receiveLoRaMessage(receive_timeout)
        status = lora_interface.getLoRaStatus()
        print("Msg: " + msg + ", Status: " + str(status))

        # Read the LoRa counters.
        status = lora_interface.getLoRaStatus()
        setup_done = lora_interface.getLoRaSetupDone()
        send_count = lora_interface.getLoRaSendCount()
        receive_count = lora_interface.getLoRaReceiveCount()
        snr = lora_interface.getLoRaSNRValue()
        rssi = lora_interface.getLoRaRSSIValue()
        rssi_packet = lora_interface.getLoRaRSSIpacketValue()
        timestamp = datetime.datetime.now().isoformat()

        msg = str(device_address) + "|" + \
              str(gateway_address) + "|" + \
              str(status) + "|" + \