ESP8266 Community Forum

- Wed Sep 30, 2015 6:58 am #30187

Hello guys,
I am using MQTT. I want to convert MAC Address into string>I tried so many things but it wont work.Any suggestion or idea will be appreciated.I implemented this one but my esp crashes at this point and again restart.
os_sprintf(abc," rdaddr: %02x:%02x:%02x:%02x:%02x:%02x\r\n tsaddr: %02x:%02x:%02x:%02x:%02x:%02x\r\n",
MAC2STR(probe_request->rdaddr), MAC2STR(probe_request->tsaddr));

For starters, you are telling os_sprintf you are going to give him 12 integers, but you are giving him just two pointers...

- Wed Sep 30, 2015 7:45 am #30189 Did you know another method for conversion.Provide me the sample code for it.

- Thu Oct 01, 2015 5:23 am #30249 In include file user_interface.h there are definitions for both... MAC format string and MAC to string:

Code: Select all#ifndef MAC2STR
#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
#endif
 

Usage:

Code: Select allos_sprintf(buffer, MACSTR, MAC2STR(bss->bssid));

or yours:

Code: Select allos_sprintf(abc," rdaddr: " MACSTR "\r\n tsaddr: " MACSTR "\r\n", MAC2STR(probe_request->rdaddr), MAC2STR(probe_request->tsaddr));

NOTE: Untested

- Thu Oct 01, 2015 8:27 am #30260 Thank you so much I will try it.