Need to add id(derived by me) in URL of NFC module

RE: Need to add id(derived by me) in URL of NFC module

Jared — Thu, 12 Nov 2020 13:15:58 GMT

Hi,

I encourage you to actually try and see the result.

Initializing it as a string will add the null character '\0' at the end of the array, which again adds this to your URL. See this link for more on the difference between a a string and char in C.

In short: use the latter method.

regards

Jared

RE: Need to add id(derived by me) in URL of NFC module

AKanade — Thu, 12 Nov 2020 08:36:30 GMT

can i initialize my unsigned char buffer like this
static unsigned char[30] = "myurl.com/"

instead of that
static unsigned char[30] = { 'm', 'y', 'u', 'r', 'l', '.', 'c', 'o', 'm' }

RE: Need to add id(derived by me) in URL of NFC module

Jared — Thu, 12 Nov 2020 08:17:50 GMT

Hi,

uint8_t is just a typdef for unsigned char, it's effectively the same. You can therefore pass a unsigned char buffer instead.

regards

Jared

RE: Need to add id(derived by me) in URL of NFC module

AKanade — Thu, 12 Nov 2020 05:05:47 GMT

or can i do like this, will take the char buffer,
static char url[len] = "myurl"

and when pass this char buffer to nfc_uri_msg_encode(), will simply type cast the buffer like this

( uint8_t * )url

RE: Need to add id(derived by me) in URL of NFC module

AKanade — Thu, 12 Nov 2020 04:55:19 GMT

can i take the char buffer instead of uint8_t buffer and pass it to nfc_uri_msg_encode ?

RE: Need to add id(derived by me) in URL of NFC module

Jared — Fri, 06 Nov 2020 14:28:41 GMT

Hi,

Yes this is possible.

You would have to take in the data that you want to add and format it correctly to a

uint8_t buffer. The buffer is then passed to nfc_uri_msg_encode() to set the correct prefix and finally to nfc_t2t_payload_set().

regards

Jared

RE: Need to add id(derived by me) in URL of NFC module

AKanade — Fri, 06 Nov 2020 05:11:42 GMT

i don't want to give the hard coded id at the coding stage. i want to give this id in url at the time of initialization( run time of the device )