LORA ping pong, point to point application
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‎2022-04-11 2:25 AM
Hi all,
I'am working with LORA and LORA-E5 chip, I'am trying to adapt the ping pong stm32 example (without lorawan). But for now I have a question, I'd like to have a point to point application, but my question is can I set a server and a client address ? I wan my 2 devices comunicate only between they.
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‎2022-04-11 5:04 AM
Everyone can hear you talking on the radio band.
​
S​o you will need to add the station ID or whatever management you want into the data packet being sent and handle it at the receivers.
​
If the data is sensitive, encrypt it, perhaps with a per station key.​
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‎2022-04-11 5:37 AM
Ok nice so I've just to add my ID in my data packet for example first 5 bits and bit 6 to 12 for example will be my data
For example with 15500 ID and PING data (example coming from ST ping pong)
....
Buffer[0] = '1';
Buffer[1] = '5';
Buffer[2] = '5';
Buffer[3] = '0';
Buffer[4] = '0';
Buffer[5] = 'P';
Buffer[6] = 'I';
Buffer[7] = 'N';
Buffer[8] = 'G';
....
Radio.Send( Buffer, BufferSize );
And for encryption what do you preconise?
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‎2022-04-11 9:42 AM
Depends how industrial you need it to be.
The STM32WLE5 has AES-256 unit, doesn't it?
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‎2022-04-12 12:45 AM
Yes you've right STM32WLE5 has a AES unit, I'll try to use it it will be new for me. Good opportunity
to learn something new :)
