Reading Raw Adv Packet

RE: Reading Raw Adv Packet

Brian — Wed, 30 Oct 2019 16:43:51 GMT

Hi Lecram,

I'm happy to hear you fixed your code. I am working on a similar project and am trying to send beacon data over UART to an esp8266 module, everything looks correct and I am not sure what's going wrong. Would you be willing to help and share your main.c source code?

RE: Reading Raw Adv Packet

Lecram — Wed, 03 Jul 2019 09:53:37 GMT

I am ashamed. Thank you very much. Im able to print out the 31 Bytes. Im so happy :)

RE: Reading Raw Adv Packet

awneil — Wed, 03 Jul 2019 09:23:47 GMT

But arrays & pointers are almost the same thing in 'C'

http://c-faq.com/aryptr/

The index operator [] can be applied to a pointer:

uint8_t* my_pointer;

my_pointer = &some_data;    // set the pointer to point to something

printf( "1st byte (offset 0) is %d", my_pointer[0] );
printf( "2nd byte (offset 1) is %d", my_pointer[1] );
printf( "3rd byte (offset 2) is %d", my_pointer[2] );
  :
  :
printf( "nth byte (offset n-1) is %d", my_pointer[n-1] );

which is equivalent to:

uint8_t* my_pointer;

my_pointer = &some_data;    // set the pointer to point to something

printf( "1st byte (offset 0) is %d", *my_pointer   );
printf( "2nd byte (offset 1) is %d", *my_pointer+1 );
printf( "3rd byte (offset 2) is %d", *my_pointer+2 );
  :
  :
printf( "nth byte (offset n-1) is %d", *my_pointer+(n-1) );

Or:

uint8_t* my_pointer;

my_pointer = &some_data;    // set the pointer to point to something

printf( "1st byte (offset 0) is %d", *my_pointer++ );
printf( "2nd byte (offset 1) is %d", *my_pointer++ );
printf( "3rd byte (offset 2) is %d", *my_pointer++ );
  :
  :

Again, this is all standard 'C' - nothing specific to Nordic.

RE: Reading Raw Adv Packet

Lecram — Wed, 03 Jul 2019 08:38:21 GMT

Thank you for your Answer but p_gap_evt->params.adv_report.data.p_data isnt a Array. Its a uint8_t* type. So im little bit confused. Also watched about the value in the debugger and i get something like "0x2000355c". This istn even close 31 Bytes. And my p_gap_evt->params.adv_report.data.len has the Value "0x001f", which is in dec 31

RE: Reading Raw Adv Packet

awneil — Wed, 03 Jul 2019 08:30:24 GMT

Surely, this is a pure 'C' question - nothing specifically to do with Nordic?

[quote userid="81031" url="~/f/nordic-q-a/49289/reading-raw-adv-packet"]How can i print out the raw 31 Byte received advertising packet? Do i need a for-loop to print out every byte? [/quote]

Of course - if you need to print 31 individual values, the obvious way to do that will be in a loop.