SPWF01SA - issue with SCAN command

[marko239955_stm1_stmicro]

Posted on August 13, 2015 at 14:36

Hey,

I have a peculiar problem, one I didn't have before, and I am not sure how exactly I have produced it...I was refactoring my code, in which I am asking the module to start scanning for networks immediately upon the module initialization...To be more precise, I am waiting for the detection of WIND:0 and WIND:32 messages, and afterwards I send AT+S.SCAN<CR> command.Here's the thing: the module freezes. It stops being responsive to any command whatsoever the moment I send this SCAN command.Now, if I put the delay of ~5ms after the detection of above-mentioned WIND messages and before sending the SCAN command, it works well.Here's the complete procedure flow:(1) pull reset pin down ( to reset the module at the beginning)(2) wait 5ms(3) pull reset pin up(4) wait for WIND:0 and WIND:32 messages(5) (optionally) wait for additional 5ms(6) send AT+S.SCAN<CR>With (5) it works, without (5), it doesn't, the module stops responding completely.I have no problem with the insertion of this delay, but I was wondering what could be the issue here. If something crosses your mind, please do share, so I can improve the library.The firmware version is 141106-0950875-SPWF01S.Thanks!M. #spwf01sa-wifi-scan-command

[Gerardo GALLUCCI]

Posted on August 13, 2015 at 14:57

Hi Marko,

I think this problem was solved into FW3.4 (WIND:32 was moved). Can you give a try? Thanks jerry

[marko239955_stm1_stmicro]

Posted on August 13, 2015 at 16:18

Ok, will try!

[marko239955_stm1_stmicro]

Posted on August 14, 2015 at 20:56

It works well now without any delay, just confirmed!