以QBoat Sunny的QIoT Suite Lite打造无线感测应用 @ 觀察筆記

今年Maker Faire Taipei前拿到QNAP的新玩意－ QBoat Sunny，一块和Rasperry Pi差不多长相的开发板，但既然是QNAP出的，自然和NAS脱不了关系，没错，它就是一块单板NAS，本来NAS服务器该有的功能，它具体而微地都能提供，最大的差异之处在于储存容量：QBoat Sunny是存在SSD中，自然没有HDD那么大容量，但用于Edge Computing是很够了。

实际测试了一下，觉得QNAP这次该是打中了IoT市场需求的痛点。怎么说呢？很多人会说：「不过就是压低成本改用ARM当base，把硬盘改成SSD做的NAS而已啊！」当你讲这句话的时候，就自己打嘴巴了！NAS不是PC灌个Windows或Linux当档案与数据库服务器，真正的NAS核心精神，是要整合自身的软件与硬件双重资源，让NAS本身在网络运算与服务上可以显示出价值！换句话来说，不是看体积大小、执行效率….等，而是可以「适时提供用户需要的服务功能」才是NAS的价值。

接下来，我们就逐步透过不同的应用呈现，来看QBoat Sunny到底有何长处。第一个就先用WiFi无线感测当作场景，看看能有多省事吧！

基础架构

MediaTek LinkIt 7697的部分

可以透过HTTP Request命令DHT11以网页的方式回传DHT11的温湿度读值，脚位连接的方式：

DHT11	MediaTek LinkIt 7697
+	5V
-	GND
DO	P3

源代码如下；就是透过LWiFi连结Wireless AP router，并且套用DHT11的链接库，可以编译完成后以浏览器试试看，例如 : http://192.168.1.xxx/temp 看会否传出温度的值

GET参数	功用
/temp	取得摄氏温度
/humi	取得湿度百分比值

程序代码如下：

<< MonitorNode.ino >>

 

 #include <LWiFi.h>

 #include "DHT.h"



#define DHTPIN 3 // what digital pin we’re connected to

 #define WARNPIN 13



// Uncomment whatever type you’re using!

 #define DHTTYPE DHT11 // DHT 11

 //#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321

 //#define DHTTYPE DHT21 // DHT 21 (AM2301)

 DHT dht(DHTPIN, DHTTYPE);



char ssid[] = “LaisanHere”; // your network SSID (name)

 char pass[] = “t101419008”; // your network password

 int keyIndex = 0; // your network key Index number (needed only for WEP)



int status = WL_IDLE_STATUS;



WiFiServer server(80);



void setup() {

 //Initialize serial and wait for port to open:

 Serial.begin(9600);

 while (!Serial) {

 ; // wait for serial port to connect. Needed for native USB port only

 }



// attempt to connect to Wifi network:

 while (status != WL_CONNECTED) {

 Serial.print(“Attempting to connect to SSID: “);

 Serial.println(ssid);

 // Connect to WPA/WPA2 network. Change this line if using open or WEP network:

 status = WiFi.begin(ssid, pass);

 }

 server.begin();

 // you’re connected now, so print out the status:

 printWifiStatus();



// Activate DHT11

 dht.begin();



pinMode(WARNPIN, OUTPUT);

 digitalWrite(WARNPIN, LOW);

 }

 void loop() {

 // listen for incoming clients

 WiFiClient client = server.available();

 if (client) {

 Serial.println(“new client”);



String msg;

 String param;



// an http request ends with a blank line

 if (client.connected()) {

 while (client.available()) {

 char c = client.read();

 msg += String(c);

 }

 }



Serial.print(msg);



int posi = msg.indexOf(“Referer: “);

 if(posi > 0)

 {

 String sb = msg.substring(posi);

 int p = sb.indexOf(“/”);

 param = sb.substring(p+2);

 p = param.indexOf(“/”);

 param = param.substring(p, p+5);

 }

 else

 {

 posi = msg.indexOf(“GET”);

 param = msg.substring(posi+4, posi+9);

 }



Serial.println(param);



// send a standard http response header

 client.println(“HTTP/1.1 200 OK”);

 client.println(“Content-Type: text/html”);

 client.println(“Connection: close”); // the connection will be closed after completion of the response

 client.println();



if(param == “/warn”)

 {

 digitalWrite(WARNPIN, HIGH);

 client.println(“WARNING !!”);

 }

 if(param == “/cler”)

 {

 digitalWrite(WARNPIN, LOW);

 client.println(“CLEAR”);

 }

 if(param == “/temp”)

 {

 float t = dht.readTemperature();

 client.println(t);

 }

 if(param == “/humi”)

 {

 float h = dht.readHumidity();

 client.println(h);

 }



// close the connection:

 client.stop();

 Serial.println(“client disonnected”);

 }



// give the web browser time to receive the data

 delay(100);

 }



void printWifiStatus() {

 // print the SSID of the network you’re attached to:

 Serial.print(“SSID: “);

 Serial.println(WiFi.SSID());



// print your WiFi shield’s IP address:

 IPAddress ip = WiFi.localIP();

 Serial.print(“IP Address: “);

 Serial.println(ip);



// print the received signal strength:

 long rssi = WiFi.RSSI();

 Serial.print(“signal strength (RSSI):”);

 Serial.print(rssi);

 Serial.println(” dBm”);

 }