Quectel Communication Module TCP/UDP Connection Guide

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Basic Module Wireless Quectel Wireless Solutions

Introduction

This time, TCP/UDP using Quectel's communication moduleAn example of a communication evaluation procedure. Let me introduce you to you.

Procedures for powering on the device and connecting to the network via a carrier line are explained in a separate article below.

(▶For more details, please refer to the "Quectel Communication Module Connection Guide.")

Introduction of equipment used

• Quectel UMTS & LTE_EVB Kit (Main board / EG95-JP TE-A board / Compatible antennas)
• USB cable (USB-A to micro-B)
• Notebook PC (for connecting the evaluation kit and controlling AT commands)
+ Compatible USB driver (Please contact us for availability)
+ AT command tools (TeraTerm, Quectel's QCOM tool, etc.)
NTT docomo 5G nanoSIM card

Checking Network Connectivity

AT+CEREG?
+CEREG: 0,1
AT+CGATT? 
+CGATT: 1

+CEREG: 0,1: Indicates that the device is registered with the network.
+CGATT: 1: The device is already attached to the network.

TCP/UDP communication procedure (responses up to "OK" for each command are omitted).

Assigning IP addresses to communication modules

AT+QIACT? AT+QIACT=1 AT+QIACT? +QIACT: 1,1,1,"xx.xxx.xxx.xxx"// IPアドレス割当確認

From the start of TCP/UDP communication to sending, receiving, and ending of communication.

// TCP/UDP接続 AT+QIOPEN=1,0,"TCP","[IPアドレス]",[ポート番号],0,0 /*TCPの場合*/ AT+QIOPEN=1,0,"UDP","[IPアドレス]",[ポート番号],0,0 /*UDPの場合*/ +QIOPEN: 0,0　/*接続成功*/ // 文字列送信 AT+QISEND=0,5 /*←例：5文字以内に設定*/ >[任意の文字列] SEND OK AT+QISENDEX=0,"48656C6C6F20576F726C6421" /*ASCII文字列の送信*/ SEND OK /*ASCII文字:48656C6C6F20576F726C6421 = Hello World!!*/ // 受信動作 AT+QIRD=0,1500 +QIRD: 0 // TCP/UDP切断 AT+QIDEACT=1 AT+QIACT=1 AT+QICLOSE=0

This procedure is an example of verifying the basic operation of TCP/UDP communication.

In this example, we demonstrated the procedure for connecting to a server with a specified IP address and port number, and sending and receiving data.

in conclusion

If you are interested in the content of this article or our latest LPWA/LTE/5G communication modules, please contact us.

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