GPS data transmission using B-L072Z-LRWAN1

[martian_first]

I am trying to send GPS data using B-L072Z-LRWAN1. I use PingPong project and changed the PingPong_Process as follows.

static void PingPong_Process(void) {
   Radio.Sleep();
   memcpy(BufferTx, tempBuffer, sizeof(tempBuffer) - 1);
   Radio.Send(BufferTx, PAYLOAD_LEN);
}

 "tempBuffer" contains a portion of the GPS data. When I receive data on another B-L072Z-LRWAN1 and view it in TeraTerm, it appears to be capturing GPS data. However, data reception stops after a few minutes. Sometimes it stops after one minute, while other times it continues for about 20 minutes. I can send text data using same B-L072Z-LRWAN1 without problem. However, errors occur when sending and receiving GPS data.

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Edited to apply source code formatting - please see How to insert source code for future reference.

[Andrew Neil]

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@martian_first wrote:

data reception stops after a few minutes

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Is it just the reception that stops, or also transmission ?

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@martian_first wrote:

However, errors occur when sending and receiving GPS data.

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What errors, exactly ?

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@martian_first wrote:

I can send text data using same B-L072Z-LRWAN1 without problem. .

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What, exactly, do you mean by that? Fixed, literal text strings?

Stuff that works for "a while", then breaks always smells of buffer problems - overrun, memory leaks, etc ...

PS:

Your memcpy uses the actual length of some buffer:

memcpy(BufferTx, tempBuffer, sizeof(tempBuffer) - 1);

But then the Radio.Send just uses a fixed length:

Radio.Send(BufferTx, PAYLOAD_LEN);

Are you sure that's right?

[martian_first · Accepted solution]

I checked the code. I found another place where memcpy was used, so I fixed it there and the error disappeared. Thank you very much.