Interference at 868MHz


#1

Hello to all!

I am trying to test my LoRa network and i take very disappointing results.
I have Ideetron’s Gateway lorank8v1 which range can reach 15 km.

In addition i use ideetron Nexus Board as microcontroller and a Nexus Demoboard where sensors are mounted.

I send 1 packet per minute about the humidity and temperature measures.

After the 200m my packets aren’t captured by the gateway.
I run the packet logger software on my gateway and all packets that are captured have a bad CRC_CODE verification which i think is due to interference.

I have thought that i may have some interferences from LTE/3G/4G networks but they are not in the bad of 868MHz in Greece.

My gateway has 8 simultaneous channels.

What should i do?
May i have to configure the datarate , the spreadfactor and the frequence in which me node transmits?
Any other ideas?


#2

Check datarate, check TX power, check antennas.

We managed to get a link at ~12KM with Multitech conduit and a 12dbi antenna. With RisingHF modules


#3

Could you give me some indicative values of these parameters for a long transmision?


#4

What data exactly do you need?

Device or gateway?


#5

Device…because my gateway has 8 simultaneous channels!


#6

Hi @fma
I am using risingHF gateway.
I have AcSiP lora module,when i tested for peer to peer i am getting good distance.
But when i send data to gateway from node,i am not getting the better distance.What are the possibilities of mistakes here?

Note:
I am using semetch packet forwarder.

Thanks,
Praveen


#7

@Praveen_Kumar_R it could be the gateway antenna.

@ktsakos We are using flex antennas I think it is this one https://shop.sodaq.com/en/molex-868-915-lora-antenna.html

Usually we get SF10-12. But we have an 8 dbi antenna and the gateway is in good altitude (6-7 floors).
imagen


#8

@fma

Thanks for your fast reply,Let me check my gateway antenna.