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2019-10-29 15:12:18 +11:00
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@@ -28,7 +28,41 @@ Once the data is collected, various sensor and network information are extracted
- Transmission intervals for each device (per packet)
- Frame count of each transmission
The standards fields within a LoRaWAN packet, such as the data rate, code rate, and frequency channel are also displayed in the csv file.
Description of the fields in the csv file are shown below.
| Field Name | Description |
| :--- | :--- |
| UTC timestamp | UTC time of receiving LoRaWAN packet. |
| date | Date within UTC timestamp. |
| time | Time within UTC timesatmp. |
| us count | The value of the gateway internal time counter at the instant the LoRaWAN packet was received, in microseconds. The value rolls over every 72 minutes. |
| frequency | Center frequency of the received signal in MHz. |
| RF chain | Radio frequency chain receiving the LoRaWAN packet. |
| RX chain | Intermediate Frequency channel used to receive the packet. |
| status | The result of the gateway's CRC test on the frame. |
| bandwidth | Bandwidth of the LoRaWAN packet in kHz. |
| datarate | Spreading factor of the LoRaWAN packet. |
| coderate | Ratio of carried bits and total number of bits received. |
| RSSI | Received siganl strength of the packet in dBm. |
| SNR | Signal to noise ratio of the LoRaWAN packet. |
| size | The number of octets in the packet. |
| DevEUI or DevAddr | EUI or address of the device that the packet was sent by. |
| AppEUI | (JoinEUI in LoRaWAN specs v1.1) The EUI of the join-server that authorized the join request. |
| fctrl | Frame control value(raw). |
| fcnt | Frame count number(converted). |
| mhdr | MAC Header(raw). |
| mtype | Message type extracted from MAC Header(raw). |
| mtype_desc | Message type extracted from MAC Header(converted). |
| MIC | 4-octet message integrity code. |
| activation | Activation method. |
| network | Network that the device of the packet belongs to. |
| deveui_manufacturer | Manufacturer of the OTAA device. |
| appeui_manufacturer | Join-server that authorized the join request. |
| payload | PHY payload of the LoRaWAN packet. |
| sec_diff | Time differential from previous packet, in seconds. |
| Freq_Plan | The frequency bandplan the device is using. |
| tx_interval | Approximated transmission interval per packet for the device, based on frame count. |
| dev_number | Number assigned to the unique device. |
## Visualization
The extracted information can also be visualized on a web dashboard, through Kibana from the Elasticsearch-Logstash-Kibana (ELK) stack. Instructions on installing and setting up the Kibana dashboard is found in the 'Kibana' directory.