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This Gateway lets us bridge LoRa wireless network to an IP network via Wi-Fi or Ethernet. The LPS8 uses a Semtech Packet forwarder and is fully compatible with the LoRaWAN protocol. The LoRa concentrator in this Gateway provides 10 programmable parallel demodulation paths. It comes with pre-configured standard LoRaWAN frequency bands to be used in different countries. Some features of the LPS8 LoRaWAN Gateway are:

LGT-92 includes a low power GPS module L76-L and a 9-axis accelerometer for motion and altitude detection. The power for both the GPS module and accelerometer can be controlled by MCU to achieve the best energy profile for different applications. The LoRa wireless technology used in LGT-92 allows the user to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional tracking services. It also has an emergency SOS button on it which when pressed sends a message for which it is configured. It is a small lightweight node that comes in two variants which are:

• LGT-92-Li: It is powered by a 1000mA rechargeable Li-ion battery and charge circuit which is used for real-time tracking with a short tracking uplink.
• LGT-92-AA: Disable the charge circuit to get the lowest power consumption and power directly by AA batteries. This is designed for asset tracking where only need to uplink a few times every day.

Here we are going to use the LGT-92-Li variant. Some features of this GPS Tracker are as mentioned below:

In this step, we are going to set up the first type of GPS tracker node that we are going to connect to our Dragino Gateway i.e. The Arduino-based GPS node that we got with the Dragino Kit. This node has an onboard GPS Chip. Though we can also connect an additional GPS antenna to this I would still use the onboard one. The GPS Tracker node is basically a GPS shield connected to the Arduino. The LoRa module connected to it is in a Zigbee kind of format and is an SX1276 LoRa module. Before connecting it to the Dragino Gateway, we need to set up and configure the Gateway with TheThingsNetwork. The process for that is similar to the one we used to configure the LG01-P Gateway. You can check this video for the configuration process from here and can also refer to the Instructables for that project from here. After doing the Gateway setup. Now we need to do the connections for the Node to function. As the GPS part is connected as a shield there is no need for any wires and all. We just need to connect two jumper cables which are the GPS-Rx and GPS-Tx pins that need to be connected to digital pins 3 and 4 respectively. When the node is bought, it has yellow-colored jumpers on the pins that we need to connect. Remove those jumpers first then you can do the connections. After doing these simple connections now it's time to upload the code into this node which we will be doing in the next step.

1. Head over to the Github repository. There you will see a file named "Arduino LoRaWAN GPS Tracker.ino". Open that file. It is the code that needs to be uploaded to the Arduino so copy that code and paste that into the Arduino IDE.

2. Head over to TheThingsNetwork Console. There you need to create an Application give it any random Application ID, Some description if you want and after that click the "Add Application" button. Once the Application gets added, head over to the devices tab.

3. There you need to register one device. Give a unique device ID to the device. Generate a random Device EUI and App EUI and hit the register button.

4. Once this is done, you need to head over to settings and switch the activation method from OTAA to ABP and after that click the save button.

5. From the Device overview page copy the device address and paste that into the code posted in Arduino IDE at its respective place. After that copy the Network Session Key and the App Session Key in the coded format and paste them into the code as well.

6. Once that is done, connect the Arduino to your PC. Select the correct COM Port and hit the upload button. Once the code gets uploaded. Open the Serial Monitor at a baud rate of 9600 and you will see some data on the serial monitor it symbolizes that the transmission of data is going on.

7. After that go back to TheThingsNetwork console and open the application that we created. There click on the Payload Formats button. Get back to the Github repository there you will see a file named "Arduino GPS Tracker Payload". Open that file and copy the small code written there and paste that under the payload formats. After that save the payload functions. This payload function is used to decode the data sent by the GPS node.

In this, we are done with the Programming part for the node as well. If you head over to the Data tab you will see some random data there before the payload function was applied. But as soon as the payload function is applied. Then you will see some meaningful data such as the Latitude, Longitude, and a message saying TTN Payload function. This shows that the node is successfully connected and the data transmission is also going on. As this node is not latched with the GPS satellites that's why it takes time in data transmission but it does also if we keep it under the open sky and add an additional antenna then we can significantly enhance the performance of this.

Till now, we have done the setup and configuration of the Arduino GPS node and sent data through it to the gateway as well. But as you can see that the Arduino Node is a bit bulky and not very much presentable. But not to worry as we have the LGT-92 GPS Tracker node from Dragino. It is a lightweight beautiful looking GPS tracker node which has a structure similar to that of the Arduino node on the inside but on the outside, it has a panel that has a big red SOS button which sends emergency data to the gateway when pressed and from the gateway, we can read that. It has a multicolor LED as well which lights up to symbolize different things. There is power ON/OFF button on the right side. It comes with some accessories such as a strap to tie it somewhere and also a USB cable which can be used to connect it to a USB to Serial converter and from there you can connect that to your PC. In our case, we do not need to do any coding as the LGT-92 comes preconfigured. The box that it comes in has some data such as the Device EUI and other things so we need to keep the box safely with us.

Now coming to the configuration part. We need to create an application as we did in the case of the Arduino GPS node. But need to do some changes that are as given below:

1. When we enter the EUI tab under the settings we see that there is a default EUI already. We need to remove that EUI and enter the App EUI present on the box of the LGT-92.

2. Now we need to create a device and inside the device settings, we need to enter the Device EUI and the App Key which we will get on the box. As these two are entered, our device gets registered and is ready to use.

Head over to the Github repository where you will see a file named "LGT-92 GPS Tracker Payload". Open the file and copy the code written there. Now go back to TheThingsNetwork Console, there you need to go to the Payload Format tab and paste the code there. Save the changes and you are done. Now when you go back to the Data tab you will see that now the data is in some understandable format. There you will see data such as the Battery Voltage, Latitude, Longitude, etc also you will see some data saying Alarm_status: False which shows that the SOS button is not pressed.

In this way, we got a look into the LPS-8 Dragino Gateway and LGT-92 GPS Tracker node and configured them to send and receive location data. These devices can be very helpful in making LoRa based projects. I will try making some projects with them in the future as well. Hope you liked this tutorial. Looking forward to seeing you next time.