查看“Mqtt mode”的源代码

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<p style="color: #4F4E4E;font-size:220%">'''Mqtt上传示例'''</p>
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此示例为MicroAI使用MQTT协议连接mCotton示例。
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<p style="color: #E87E05;font-size:135%">所需硬件</p>
*[[mCookie-Core+]]
*[[MBattery+]]
*[[MicroAI]]
*[[MCookie-Hub/zh]]
*1.27mm 4P传感器线
*Micro USB线
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<p style="color: #E87E05;font-size:135%">电路搭建</p>
将Battery、Core+、hub堆叠在一起，通过MicroUSB数据线接入电脑，使用传感器线连接MicroAI的UART(串口)并下载如下程序至Core+
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[[File:MicroAI连接.png|400px|center]]
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<p style="color: #E87E05;font-size:135%">代码</p>
发射端程序:
<source lang="cpp">


#include <Microduino_Ai.h>
#include <aJSON.h>

#define WIFI_SSID   "Microduino"
#define WIFI_PWD    "MakerModule2016"
#define MQTTSERVER   "mqtt://mCotton.microduino.cn"
#define ID   "5bf768cd38dd330017b61492"
#define USER   "5bf768cd38dd330017b61492"
#define PASS   "tAP5CjYYKgX1"
#define SUBSCRIBTOPIC   "ca/58f881ae42c66e00013cf445"
#define SUBSCRIBTOPICP   "cp/58f881ae42c66e00013cf445"
#define PUBLISHTOPIC   "dp/58f881ae42c66e00013cf445"

#define INTERVAL_sensor 2000
unsigned long sensorlastTime = millis();

MicroAi mAi(&Serial1);

String jsonData;
char strBuf[64] = {0};

void setup() {
  Serial.begin(115200);

  Serial.print("MicroAi set mode: MQTT.");
  Serial.println("start initiation. ");
  if (mAi.begin(MODE_MQTT)) {
    Serial.println("init OK!");
  } else {
    Serial.println("init failed!");
    while (1);
  }

  if (mAi.setWifi(WIFI_SSID, WIFI_PWD)) {
    Serial.println("set wifi ssid and password OK!");
  } else {
    Serial.println("set wifi ssid and password failed!");
    while (1);
  }
  Serial.print("wifi connecting");
  while (mAi.getRssi() == 0) {
    Serial.print(".");
    delay(1000);
  }
  Serial.println("\r\nwifi connected.");

  if (mAi.mqttSetServer(MQTTSERVER)) {
    Serial.println(F("set mqtt server OK!"));
  } else {
    Serial.println(F("set mqtt server failed!"));
    while (1);
  }

  if (mAi.mqttConnect(ID, USER, PASS)) {
    Serial.println(F("set mqtt connect params OK!"));
  } else {
    Serial.println(F("set mqtt connect params failed!"));
    while (1);
  }

  Serial.print("mqtt server connecting");
  while (mAi.mqttGetStatus() <= 0) {
    Serial.print(".");
    delay(1000);
  }
  Serial.println("\r\nmqtt server connected.");

  if (mAi.mqttSetSubscrib(SUBSCRIBTOPIC)) {
    Serial.println(F("set mqtt subscrib ca topic OK!"));
  } else {
    Serial.println(F("set mqtt subscrib ca topic failed"));
  }

  if (mAi.mqttSetSubscrib(SUBSCRIBTOPICP)) {
    Serial.println(F("set mqtt subscrib cp topic OK!"));
  } else {
    Serial.println(F("set mqtt subscrib cp topic failed"));
  }

  char *str = "{\"Humidity\":66.66}";
  if (mAi.mqttPublish(PUBLISHTOPIC, str)) {
    Serial.println(F("mqtt publish OK!"));
  } else {
    Serial.println(F("mqtt publish failed!"));
  }

  delay(1000);
}

void loop() {

  if (mAi.mqttQuery(strBuf) > 0) {
    Serial.print("recv: ");
    Serial.println(strBuf);
  }

  if (mAi.mqttGetStatus() > 0) {
    if (sensorlastTime > millis())
      sensorlastTime = millis();
    if (millis() - sensorlastTime > INTERVAL_sensor) {
      float lightness = map(analogRead(A0), 0, 1023, 0, 255);
      jsonData = "{\"Lightness\":";
      jsonData += String(lightness);
      jsonData += "}";

      //jsonData = "{\"Humidity\":\"mCookie\"}";

      int str_len = jsonData.length() + 1;
      jsonData.toCharArray(strBuf, str_len);

      // Serial.println(strBuf);

      if (mAi.mqttPublish(PUBLISHTOPIC, strBuf)) {
        Serial.println(F("mqtt publish OK!"));
      } else {
        Serial.println(F("mqtt publish failed!"));
      }
      sensorlastTime = millis();
    }
  }
  delay(100);
}
</source>
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<p style="color: #E87E05;font-size:135%">运行结果</p>
{|style="width: 90%; text-align: center;"
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|style="width: 25%;"|[[File:MicroAIMQTTSerial.png|300px|center|thumb|串口打印]]
|style="width: 25%;"|[[File:MicroAIMQTTshow.png|300px|center|thumb|点阵屏幕]]
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<p style="font-size:115%">[[MicroAI Reference|返回MicroAI Reference界面]]</p>