AT+CIPSTART="UDP","udp.os.1nce.com","4445"

OK

CONNECT OK
AT+CIPSEND

> welcome to 1nce os

SEND OK

This is a UDP response message from my server!

AT+CIPCLOSE

CLOSE OK
AT+CIPSHUT

SHUT OK

Preparation

Configure the SIM7000G module with the appropriate network settings, such as the APN and operator ID, and ensure that it is connected to the cellular network.

Start a UDP Connection

A UDP connection towards a server with a given UDP port can be started with 'AT+CIPSTART=...'. The AT Command needs to list the UDP protocol, the target URL or IP and the used UDP Port. If the connection is successfully opened, 'CONNECT OK' is returned.

Send UDP Data

With 'AT+CIPSEND' the data send mode is activated. Any input send to the modem will be forwarded via the UDP connection. To deactivate the send mode, '1A' encoded as a HEX value needs to be send to the SIM7000G. The modem will acknowledge the sent message with 'SEND OK'.

Receive UDP Data

By default, the modem will forward any incomming UDP data while the connection is open to the serial output interface.

Close UDP Connection

An active UDP connection can be closed with 'AT+CIPCLOSE'. The modem will close the UDP connection and respond with 'CLOSE OK'.

Close Data Session

To close the entire data session that was opened with 'AT+CIICR', 'AT+CIPSHUT' needs to be used. The command will respond with 'SHUT OK'. Afterwards a new session can be started at any point.

Wrap Up

This guide showed the basic setup of a SIM7000G with a 1NCE SIM to send and receive data using a UDP connection.

For more details and documentation please refer to the AT Command manual of the SIM7000G.