AR meets IoTs: 當擴增實境遇到物聯網-讀取感知訊息程式解析

AR meets IoTs: 當擴增實境遇到物聯網相關文章，如下：
初接觸
用網頁來控制LED亮滅
發佈感知訊息程式解析

在上圖我們可以清楚地看到在IoT content目錄下，有三個原始程式：

1. IoT.cs
2. ReadStream.cs
3. WebStreamReader.cs

當您點選右上角的codeContainer，只看到兩個腳本程式，分別是IoT.cs和ReadStream.cs，但沒有看到WebStreamReader.cs。其實WebStreamReader是被宣告在ReadStream程式內，如下：

public class ReadStream : MonoBehaviour

{

public string PhotonParticleURL = "https://api.particle.io/v1/devices/events?access_token=649e7d09d0980e4b649e42f6dcff79887d9570e2";

WebStreamReader request = null;

我們以在ReadStream程式中找到WRequest()函式，您就可以看到程式是如何建立物件new WebStreamReader()，如何啟動網站連結Start(PhotonParticleURL)，如何取得網站資料request.GetNextBlock()，再解析出溫度的資料Contains ("temperature")，最後再顯示在AR畫面上gameObject.GetComponent ().microTemperatureVal。

IEnumerator WRequest()

{

request = new WebStreamReader();

request.Start(PhotonParticleURL); //https://www.ourtechart.com//wp-content/uploads/2016/04/jsonAllData.txt");

string stream = "";

while (true)

{

string block = request.GetNextBlock();

if (!string.IsNullOrEmpty(block))

{

stream += block;

//Debug.Log ("Stream1: " + stream);

string[] data = stream.Split(new string[] { "\n\n" }, System.StringSplitOptions.None);

//Debug.Log ("Data length: " + data.Length);

stream = data[data.Length - 1];

for (int i = 0; i < data.Length - 1; i++)

{

if (!string.IsNullOrEmpty(data[i]))

{

// Debug.Log ("Data: " + data [i]); // print all block of data (event + data)

if (data [i].Contains ("light")) {

lightTrue = true;

string output = data [i].Substring(data [i].IndexOf("{"));

parseDataLight = JsonUtility.FromJson (output);

//Debug.Log ("Data of Photoresistor: " + parseData.data);

//text.text = parseData.data.ToString ();

//gameObject.GetComponent ().microPhotoresistorVal = parseDataLight.data;

}

if (data [i].Contains ("temperature")) {

temperatureTrue = true;

string output = data [i].Substring(data [i].IndexOf("{"));

parseDataTemperature = JsonUtility.FromJson (output);

//Debug.Log ("Data of Temperature sensor: " + parseData.data);

//text.text = parseData.data.ToString ();

//gameObject.GetComponent ().microTemperatureVal = parseDataTemperature.data;

}

if (data [i].Contains ("motion")) {

motionTrue = true;

string output = data [i].Substring(data [i].IndexOf("{"));

parseDataMotion = JsonUtility.FromJson (output);

//Debug.Log ("Data of PIR sensor: " + parseData.data);

//text.text = parseData.data.ToString ();

//gameObject.GetComponent ().motionDetectedBool = Convert.ToBoolean(parseDataMotion.data);

}

if (data [i].Contains ("ultraviolet")) {

ultravioletTrue = true;

string output = data [i].Substring(data [i].IndexOf("{"));

parseDataUltraviolet = JsonUtility.FromJson (output);

//Debug.Log ("Data of PIR ultraviolet: " + parseData.data);

//text.text = parseData.data.ToString ();

//gameObject.GetComponent ().microUltravioletVal = parseDataUltraviolet.data;

}

if (data [i].Contains ("humidity")) {

humidityTrue = true;

string output = data [i].Substring(data [i].IndexOf("{"));

parseDataHumidity = JsonUtility.FromJson (output);

//Debug.Log ("Data of Humidity: " + parseData.data);

//text.text = parseData.data.ToString ();

//gameObject.GetComponent ().microHumidityVal = parseDataHumidity.data;

}

//Debug.Log ("TEst: " + humidityTrue + temperatureTrue + lightTrue + ultravioletTrue);

if (humidityTrue && temperatureTrue && lightTrue && ultravioletTrue) {

//Debug.Log ("PRINT ALLLLLLLLLLLLLL");

gameObject.GetComponent ().microPhotoresistorVal = parseDataLight.data;

gameObject.GetComponent ().microTemperatureVal = parseDataTemperature.data;

gameObject.GetComponent ().motionDetectedBool = Convert.ToBoolean(parseDataMotion.data);

gameObject.GetComponent ().microUltravioletVal = parseDataUltraviolet.data;

gameObject.GetComponent ().microHumidityVal = parseDataHumidity.data;

humidityTrue = false;

motionTrue = false;

temperatureTrue = false;

lightTrue = false;

ultravioletTrue = false;

}

}

}

}

yield return new WaitForSeconds(1);

}

真正要顯示在畫面上是IoT.cs的任務，在Update()中可以找溫度的片斷程式如下：

microTemperatureText.text = microTemperatureVal.ToString ();

checkTemperature ();

依照顏色來改變按鈕的顏色值：

private void checkTemperature() {

index = 0;

if (microTemperatureVal >= minTemp && microTemperatureVal <= maxTemp) // Green Color - temperature is ok

greenButtonColor (index);// (Buttons[0]);

if (microTemperatureVal > maxTemp) // Red Color - temperature is too Hot

orangeButtonColor(index);

if (microTemperatureVal < minTemp) // Blue Color - temperature is too Cold

blueButtonColor (index);

}