Related HPD13A LoRa Node

Hello,
I am using ARDUINO UNO and HPD13A(RFM95W) LoRanode Module.
I want to transfer my data through Arduino+LoRanode module (HPD13A) to THE THINGS NETWORK.
I am using DRAGINO LG308-EC25 Gateway and already registered my gateway and device on the TTN(The Things Network).
Please Give me some suggestion.
How can I send my data on the GATEWAY through the LoRaNode ?
What is the payload function exactly?

A post was merged into an existing topic: Need Help Connecting LG308 and B-L072Z-lpwan1