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Decoded data not the same as transmitted data #175

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radio-satellites opened this issue Dec 15, 2023 · 0 comments
Open

Decoded data not the same as transmitted data #175

radio-satellites opened this issue Dec 15, 2023 · 0 comments

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@radio-satellites
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Hi!

I noticed that a lot of the questions are not being answered here... I hope this one will be different...

That being said, thank you for your wonderful software!

I need some help with decoding packets. I am using a custom SX1278 board with radiolib to transmit 255-byte long LoRa imagery packets. I can confirm that the right data is getting into the radio by printing the buffer out and converting it to binary (bitdump):
image
Here's the bitdump of the received frames (using gr-lora):
image
Not only are the frames obviously different, they do not decode.

Here are my settings:

To decode:

  • GnuRadio LoRa realtime receive script in this repo

To transmit:

  • Bandwidth 125KHz
  • Spreading Factor 7
  • Coding rate 4/8

I would appreciate any insight into this issue. Thank you!

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