AT^SIST always returns "Operation not allowed" | Telit Cinterion IoT Developer Community
December 2, 2014 - 3:58am, 3533 views
I'm a beginner user with Gemalto EHS8. By using AT commands I can connect to my TCP server in non-transparent mode! Sending and receiving data is OK! But when I follow the instractions on the datasheet to go to the transparent mode on the AT^SIST = 2 , I always receive "operationb not allowed" erroe message! The AT commands I have issued and received error is as bellow :
AT^SISC = 0, conType, gprs0 -> OK
AT^SISC = 0,apn,internet ->OK
AT^SCFG = "TCP/WithURCs","off" -> ^SCFG: "Tcp/WithURCs","off" OK
AT^SISS=2,srvType,"Socket" -> OK
AT^SISS=2,conId,0 -> OK
AT^SISS=2,address,"socktcp://***.yyy.zzz.ttt:ppppp;ext;timer=200" -> OK
AT^SISO=2 -> OK
waiting for connection establishment. After connection establishment ...
AT^SIST=2 -> Error
Please kindly let me know if you know what is the problem here!