以QBoat Sunny的QIoT Suite打造無線感測應用 @ 觀察筆記

今年Maker Faire Taipei前拿到QNAP的新玩意－ QBoat Sunny，一塊和Rasperry Pi差不多長相的開發板，但既然是QNAP出的，自然和NAS脫不了關係，沒錯，它就是一塊單板NAS，本來NAS伺服器該有的功能，它具體而微地都能提供，最大的差異之處在於儲存容量：QBoat Sunny是存在SSD中，自然沒有HDD那麼大容量，但用於Edge Computing是很夠了。

實際測試了一下，覺得QNAP這次該是打中了IoT市場需求的痛點。怎麼說呢？很多人會說：「不過就是壓低成本改用ARM當base，把硬碟改成SSD做的NAS而已啊！」當你講這句話的時候，就自己打嘴巴了！NAS不是PC灌個Windows或Linux當檔案與資料庫伺服器，真正的NAS核心精神，是要整合自身的軟體與硬體雙重資源，讓NAS本身在網路運算與服務上可以顯示出價值！換句話來說，不是看體積大小、執行效率….等，而是可以「適時提供使用者需要的服務功能」才是NAS的價值。

接下來，我們就逐步透過不同的應用呈現，來看QBoat Sunny到底有何長處。第一個就先用WiFi無線感測當作場景，看看能有多省事吧！

基礎架構

MediaTek LinkIt 7697的部分

可以透過HTTP Request命令DHT11以網頁的方式回傳DHT11的溫溼度讀值，腳位連接的方式：

DHT11	MediaTek LinkIt 7697
+	5V
-	GND
DO	P3

原始程式碼如下；就是透過LWiFi連結Wireless AP router，並且套用DHT11的程式庫，可以編譯完成後以瀏覽器試試看，例如 : http://192.168.1.xxx/temp 看會否傳出溫度的值

GET參數	功用
/temp	取得攝氏溫度
/humi	取得濕度百分比值

程式碼如下：

<< 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”);

 }