BGS5T - incorrect response to the command ATD*99***1# | Telit Cinterion IoT Developer Community

Hi all,

I want to use BGS5T as normal modem connected to PLC (which support GPRS modem).Till now I was using TC65 Terminal and everything worked fine.But now I have to replace it witch BGS5T. And there is a problem...

The PLC send AT commands and require response in numeric result code format. To achieve this the init string contain ATV0 command. So the result of every AT command should be like this (ATV0):

• Information response: <text><CR><LF>
• Short result code format: <numeric code><CR>

and NOT like this (ATV1):

• Information response: <CR><LF><text><CR><LF>
• Long result code format: <CR><LF><verbose code><CR><LF>

So the result of ATD*99***1# should be:

1<CR>

but it isn't !! Modem response is:

<CR><LF>1<CR>

which looks like the Long result code format !!!

Maby because: <empty_text><CR><LF>1<CR> -> <CR><LF>1<CR> ? But response of ATD*99***1# command should contain only the numeric code, and no text information!

Anyway after this response PLC try to back to the AT command mode (+++ command), and start the init sequence again.

Here is the full log of the communication between PLC and modem:

12:56:21.319> <0>^SYSLOADING

12:56:28.681> 

12:56:28.681> ^SYSSTART

12:56:33.923> +++ATH

12:56:36.545> 0

12:56:36.607> ATE0V0&D0&C1&W

12:56:37.605> 0

12:56:37.668> AT+CGDCONT=1,"IP","hidden_apn_name"

12:56:37.855> 0

12:56:37.855> AT+CSQ

12:56:37.918> +CSQ: 99,99

12:56:37.980> 0

12:56:37.980> AT$$RSSI

12:56:38.106> 4

12:56:43.158> AT+CREG?

12:56:43.220> +CREG: 0,0

12:56:43.220> 0

12:56:44.907> +PBREADY

12:56:58.322> AT+CREG?

12:56:58.384> +CREG: 0,1

12:56:58.446> 0

12:56:58.446> AT+CGATT?

12:56:58.509> +CGATT: 1

12:56:58.509> AT+CGATT=0

12:56:58.509> 0

12:56:59.071> 0

12:57:18.601> AT+CGATT=1

12:57:21.972> 0

12:57:38.632> AT+CGREG?

12:57:38.632> +CGREG: 0,1

12:57:38.696> 0

12:57:38.696> ATD*99***1#

12:57:38.759> 

12:57:38.759> 1

12:57:41.817> +++~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~ATH

12:57:42.876> ~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~ATE0V0&D0&C1&W

~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }12:57:49.929> 9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~~˙}#Ŕ!}!}!} }9}"}&} } } } }#}%Â#}%}%}&ôŔµž}'}"}(}"ˆČ~3

12:57:53.859> +++ATH

12:57:53.921> 0

12:57:53.921> ATE0V0&D0&C1&W

12:57:54.172> 0

12:57:54.172> AT+CGDCONT=1,"IP","hidden_apn_name"

12:57:54.234> 0

12:57:54.234> AT+CSQ

12:57:54.296> +CSQ: 27,99

12:57:54.296> 0

12:57:54.358> AT$$RSSI

12:57:54.420> 4

.....

I would be very grateful for your help in solving this problem.

Regards,
Darek