实现Easy IoT上MQTT消息的通讯

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1、图形化编程代码块

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2、Arduino C 代码

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/*!
 * MindPlus
 * mpython
 *
 */
#include <MPython.h>
#include <DFRobot_Iot.h>
// 函数声明
void obloqMqttEventT1(String& message);
// 静态常量
const String topics[5] = {"Qq_qcBjZR","l0NalW7GR","","",""};
const MsgHandleCb msgHandles[5] = {NULL,obloqMqttEventT1,NULL,NULL,NULL};
// 创建对象
DFRobot_Iot myIot;


// 主程序开始
void setup() {
	mPython.begin();
	myIot.setMqttCallback(msgHandles);
	myIot.wifiConnect("DESKTOP-RS229GR 3737", "19990327");
	display.setCursorLine(1);
	display.printLine("连接ing");
	while (!myIot.wifiStatus()) {yield();}
	display.fillScreen(0);
	display.setCursorLine(1);
	display.printLine("WiFi连接成功");
	display.setCursorLine(2);
	display.printLine(myIot.getWiFiLocalIP());
	delay(1000);
	myIot.init("iot.dfrobot.com.cn","US5XFBCWg","","UI5uFBCZRz",topics,1883);
	myIot.connect();
	while (!myIot.connected()) {yield();}
	display.setCursorLine(3);
	display.printLine("MQTT连接成功");
}
void loop() {
	if ((touchPadP.isTouched())) {
		myIot.publish(topic_0, "黄永迪 2018A14101");
	}
}


// 事件回调函数
void obloqMqttEventT1(String& message) {
	display.fillScreen(0);
	display.setCursorLine(2);
	display.printLine(message);
}

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3、实现效果图

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甲按A键发送消息至topic1，同时监听topic0，
乙监听topic1，接收到甲的消息后按触摸P键回复消息给topic0：