Connection of heltec Lorawan esp32 v2 and HT-M00

Hello ,

Currently I am trying to connect just the node to the gateway. The gateway (HT-M00) has successfully connected to my private server, however it never successfully connects to the Node (Lorawan Esp32 v2).

I recall reading that nodes need to have their preamble extended from 8 to 16 in order to work.

Please advise on how I can do so?