Decode data from RN2483

BastilleResearch / gr-lora

GNU Radio OOT module implementing the LoRa PHY, based on https://github.com/matt-knight/research/tree/master/2016_05_20_jailbreak

GNU General Public License v3.0

471 stars 92 forks source link

Decode data from RN2483 #39

Open DmitriiCM opened 5 years ago

DmitriiCM commented 5 years ago

Hi,

Thanks for the cool product. Interesting thing to test, but I was not able to get proper data from RN2483.

I am sending this data to the modem:

mac pause
radio set mod lora
radio set sf sf8
radio set freq 869100000
radio set cr 4/8
radio tx 1234 (this in a loop)

With 'rpp0/gr-lora' I can decode the data properly, and get output like '02 90 70 12 34 c8 ea' - "12 34" is there.

With BastilleResearch/gr-lora I am getting wrong data: 'df f7 2b 56 5b 02'. Parameters (SF, bw, others looks the same).

Is it a bug, or I'm doing something wrong, or this library is not compatible with RN2483?

GRC and IQ file in attach: lora_test.zip

Thanks.

rokigeorg commented 5 years ago

Hey,

to be honest, i cant really help you on this. Its been to long for me that I have used the RN2483.

Forget about the rpp0/gr-lora. It might be buggie. Only use BastilleResearch/gr-lora its the original repo.

Also I remember, when I used tried to establish a Peer-to-Peer connction between to Lora modules (HopeRF Lora module) I got some junk data before the payload. It looked something likes this:

| Junk1 | Junk2 | Junk3|Payload|

I never found the reason for it. Maybe Preamble stuff ... Maybe is the LoraWan Header ...

Back then, i decided to cut of the junk of the received Package. I had a deadline :-)

Let me know if you find out the reason for the junk data in the header.

riatankarsahu commented 4 years ago

Hello @DmitriiCM , I am now a days working with gr-lora and also having the same problem. I am using LimeSDR to receive the signal. Did you figure out the solution? I will be highly glad to have them if you have any..... Thanks in advance!!! -- Ritankar