MQTT通信指令解析

m0_68428570

328人浏览 · 2026-05-10 16:58:32

m0_68428570 · 2026-05-10 16:58:32 发布

大夏龙雀DX-CT01模块

MQTT通信 AT指令整理

一、基础自检 & 网络注册（必测，确保模块正常）

Plain Text
AT                  // 模块自检，返回OK即正常
ATI                 // 查询模块详细信息
AT+CEREG?           // 查询4G网络注册状态，返回+CEREG: 0,1或0,5为正常
AT+CSQ              // 查询信号质量，数值20-30为最佳AT+QICSGP=1,1,"CMIOT","","" // 配置APN（官方说明：国内普通SIM卡可省略，不影响使用）

二、MQTT客户端配置 & 连接（核心步骤，顺序不可乱）

Plain Text
AT+MQTTCLIENT="DX_CT01_001" // 设置MQTT客户端ID，必须唯一，不可与其他设备重复
AT+MQTTACC="",""             // 设置MQTT用户名/密码，公共服务器（如broker.emqx.io）没有密码，填空即可
AT+MIPSTART="broker.emqx.io",1883,3 // 建立TCP连接到MQTT服务器，端口1883（明文），3=IPv4
AT+MCONNECT=1,60             // 发起MQTT协议握手，心跳60秒，返回+MCONNECT: SUCCESS即连接成功
AT+MQTTSTATU                 // 查询MQTT连接状态，确认连接是否正常

三、模块发布消息（上行，模块→电脑/MQTTX）

Plain Text
// JSON格式发布

AT+MPUB="4G_Test_01",0,0,"123"
AT+MPUB="4G_Test_01",0,0,"234"
AT+MPUB="4G_Test_01",0,0,"345"
AT+MPUB="4G_Test_01",0,0,"567"
AT+MPUB="4G_Test_01",0,0,"135"
AT+MPUB="4G_Test_01",0,0,"258"
AT+MPUB="4G_Test_01",0,0,"369"

AT+MPUB="4G_Test_01",0,0,"{\"msg\":\"test\"}"
AT+MPUB="4G_Test_01",0,0,"{\"name\":\"test\"}"

四、模块订阅消息（下行，电脑/MQTTX→模块）

Plain Text
AT+MSUB="4G_CMD_102",0 // 订阅电脑下发指令的主题，QoS=0，执行后才能接收电脑指令

五、恢复默认设置（调试出错时使用）

Plain Text
AT+DEFAULT // 恢复模块出厂设置，恢复后需重新执行所有配置指令

六、一键完整流程（直接复制到SSCOM，按顺序发送即可跑通）

Plain Text
AT
ATI
AT+CEREG?
AT+CSQ
AT+QICSGP=1,1,"CMIOT","",""
AT+MQTTCLIENT="DX_CT01_001"
AT+MQTTACC="",""
AT+MIPSTART="broker.emqx.io",1883,3
AT+MCONNECT=1,60
AT+MQTTSTATU
AT+MPUB="4G_Test_01",0,0,"123"
AT+MPUB="4G_Test_01",0,0,"234"
AT+MPUB="4G_Test_01",0,0,"345"
AT+MPUB="4G_Test_01",0,0,"567"
AT+MQTTCLIENT="DX_CT01_001"
AT+MQTTACC="",""
AT+MIPSTART="broker.emqx.io",1883,3
AT+MCONNECT=1,60
AT+MPUB="4G_Test_01",0,0,"135"
AT+MPUB="4G_Test_01",0,0,"258"
AT+MPUB="4G_Test_01",0,0,"369"
AT+MPUB="4G_Test_01",0,0,"{"msg":"test"}"