A lot of modems reserve this character sequence as the 'Escape Sequence' and you may place the remote modem in its command mode. Ironically, you may send a stream of characters including the +++, but the escape sequence (for the Hayes Command Set) is invoked if you have a pause of at least one second, the '+++' then another pause for one second. That's probably why your device is waiting for more + characters.
Send "Test +++ this message" in one go any you'll see it transmits through OK.
Last edited by Zenerdiode : 02-11-2010 at 11:56 PM.
|