hii robotsmani...i'm kind of having a similar situation u had when u hav posted this ...
1>when i connect my aubtm20 serially on 9600 baud it sends me "OK" on my hyperterminal..
2> within 60 sec when i press " LLL " response is "OK"
3> now when i enter the command : <cr><lf>AT?<cr><lf> response is "ERROR"..(any command i enter it gives me an "ERROR" response (except the escape command i.e." ===")
4>why it's not taking in the command ( "AT?")..??
5>Is there any problem with my syntax(that's what i'm expecting : are my <cr> and <lf> incorrect??
Note: now that i got a "OK" response from my aubtm20 it's clear that the whole circuit is just fine!
please ..i'm struck over here and need your help..thanks in advance!!