Wisnode LoRa at+join=otaa fail
I constructed my Lora gateway using Raspberry Pi 3 and LoRa RAK 831 Module and succcessfully registered it to TTN with following the steps written in https://www.hackster.io/naresh-krish/getting-started-with-the-rak-831-lora-gateway-and-rpi3-e3351d .
For the next step, I followed https://www.hackster.io/naresh-krish/getting-started-with-the-rak811-lora-node-67f157 this guideline to construct node with my Wisnode Module with RAK812 since the steps are quite the same.
I used RealTerm to join as OTAA like the guideline did, however everytime i tried at+join=otaa command I got at+recv=6,0,0 which means as join status fail after several minutes. I am using this system in EU band with 433 MHz antenna. Can you help me with which configurations I should make&change in order to join otaa successfully?
An important thing to point out, I've changed the MAC address of the node module and I got ERROR -5 and ERROR -6 when i tried to send data although I know it will not work. I can understand ERROR -5 but i couldn't understand the -6 error.
If you want to use the EU433 band, you should choose LORIOT, you should read this document.
http://docs.rakwireless.com/en/RAK831 LoRa Gateway/Software Development/RAK831Raspberry Pi3 Connect LORIOT V1.0.pdf