UDP/IP with a BG96

We shall create a UDP “connection” to our UDP Test Server with a BG96. The server simply replies whatever is typed into the prompt/terminal.

1.0 Remote Host Details

The following table lists the remote server details.

IP Address13.237.19.148
Port3000

2.0 Start a UDP Service and Send Data

Initially its required to configure and activate a context. In our example we are using a Telstra SIM and the APN may be different in your case.

Important

Before continuing on please make sure you disable the Power Save Mode: AT+CPSMS=0

2.1. Configure a Context and Activate

For Telstra SIM the following parameters are used:

APNtelstra.internet
Context Number1

Send the following AT Commands using your preferred terminal program such as QCOM or Putty. On how to connect to the BG96 with USB/Serial please refer to the /wiki/how-to/establish-a-virtual-com-port-connection-to-bg96-with-usb/

Configure and Activate Context:

AT+QICSGP=1,1,"telstra.internet","","",1
OK

Activate the context: 

AT+QIACT=1
OK

Check the active context:

AT+QIACT?
+QIACT: 1,1,1,"10.102.135.75"

OK

“10.102.135.75” is the IP address associated to our active context. The IP returned for you will be different.

2.2. Start a UDP Service

There are three types of data access modes available when opening a socket service.

  1. Buffer access mode
  2. Direct push mode
  3. Transparent access mode

In our example we shall use direct push mode. Please refer to the Quectel BG96 TCP(IP) AT Commands document for a detailed explanation of the data access modes.

AT+QIOPEN=1,2,"UDP SERVICE","127.0.0.1",0,3030,0
OK

+QIOPEN: 2,0

Query if the connection status of the associated context id, in our case its 1.

AT+QISTATE=0,1

+QISTATE: 2,"UDP SERVICE","10.121.9.118",0,3030,2,1,2,0,"usbmodem"

OK

2.3. Send Data to the Remote Server

We will now send the text “hello\r” to the remote server. For this we shall use the fixed length AT+QISEND command.

AT+QISEND=2,6,"13.237.19.148",3000

>

After the “>” is prompted we are ready to send the text.

>hello
SEND OK

+QIURC: "recv",2

2.3. Read the Data

Read the echoed text with the following command.

AT+QIRD=2

+QIRD: 6,"13.237.19.148",3000
hello


OK

2.4. Close the UDP Service

To be polite we shall close the active UDP service with the following command:

AT+QICLOSE=2
OK

3.0 AT Command Sequence

Bellow is the complete command sequence.

AT+QICSGP=1,1,"telstra.internet","","",1
OK

AT+QIACT=1
OK

AT+QIACT?
+QIACT: 1,1,1,"10.102.135.75"

OK

AT+QIOPEN=1,2,"UDP SERVICE","127.0.0.1",0,3030,0
OK

+QIOPEN: 2,0

AT+QISEND=2,6,"13.237.19.148",3000

>hello
SEND OK

+QIURC: "recv",2
AT+QIRD=2

+QIRD: 6,"13.237.19.148",3000
hello


OK