leaving transparent mode with DTR line toggling unreliable | Telit Cinterion IoT Developer Community
July 5, 2019 - 9:15am, 5649 views
Our scenario is that we enter transparent mode to a server, send some data and close transparent mode to communicate with some other host, etc. We use DTR line toggling to escape from transparent mode. Now it seems that *some****** the modem becomes unresponsive after toggling the line. My assumption here is that the modem either some***** stops/halts or transparent mode remains on. Any idea which? The symptom is that issueing a command such as ATI in the error case does not respond *at all*.
- Is there a guidance for how long we should keep the DTR line high?
- it seems more reliable if we toggle the DTR line multiple *****? Is this true?
Note: ATI1 gives: Cinterion||PLS8-E||REVISION 03.017||A-REVISION 01.000.05||||OK in the normal case.