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cs:mervis-db:10-api [2017/07/11 18:55]
m.chlupac [Příklady použití] 		cs:mervis-db:10-api [2024/05/08 10:42] (aktuální)
Řádek 1: Řádek 1:
 ====== API ====== ====== API ======
  
-Mervis DB nabízí otevřené rozhraní protokolu [[https://en.wikipedia.org/wiki/SOAP|SOAP]].+Mervis DB nabízí otevřené rozhraní protokolu [[https://en.wikipedia.org/wiki/SOAP|SOAP]]. Odpovídající WSDL je k ke stažení:
  
-Pro speciální použití existují i další rozhraní pro komunikaci s Mervis DB - pro jejich použití a popis kontaktujte prosím [[:cs:help:support|technickou podporu]].+  * {{:en:mervis-db:mervisdb_wsdl-2017-07-12.xml|mervisdb_wsdl-2017-07-12.xml}}
  
 +Pro speciální použití existují i další rozhraní pro komunikaci s Mervis DB - pro jejich použití a popis kontaktujte prosím [[:cs:help:support|technickou podporu]].
  
 ===== Seznam základních podporovaných funkcí ===== ===== Seznam základních podporovaných funkcí =====
- 
  
 ^Function^Description| ^Function^Description|
Řádek 18: Řádek 18:
 ^DeleteVariables| | ^DeleteVariables| |
 ^DeleteData| | ^DeleteData| |
 +^ReplaceData|Delete data from time range and save one or multiple records from one or multiple variables in one API call|
 ^EnsureVariables| | ^EnsureVariables| |
-^GetTransformedData/GetTransformedDataAsync| |+^GetTransformedData/GetTransformedDataAsync|Method for reading of aggregated results with given time period, the aggregation may be Min, Max, Integral, Weighted average, First, Last and Median |
 ^GetServerVersion| | ^GetServerVersion| |
 ^GetVariableStats|Obsolete| ^GetVariableStats|Obsolete|
 ^GetVariableStatsAsync|Obsolete| ^GetVariableStatsAsync|Obsolete|
 ^CheckCredentials| | ^CheckCredentials| |
 +
 +===== Vlastnosti objektu =====
 +  * (UTC) Časová známka - UTC časová známka záznamu
 +  * Platnost do - UTC časová známka konce platnosti konkrétního záznamu
 +  * Interval - doba (v sekundách), kdy by měla být zaznamenána další hodnota
  
 ===== Příklady použití ===== ===== Příklady použití =====
  
-  * C# +==== C# ==== 
-  * {{ :en:mervis-db:mervisdb_getdata_example_php.zip |PHP}} + 
-  * Matlab+{{ :en:mervis-db:mervis_db_csharp.png?direct&800 |}} 
 + 
 +=== Download === 
 + 
 + 
 +{{ :en:mervis-db:mervisdb_getdata_example.zip |}}\\ 
 +{{ :cs:mervis-db:mervisdb_savedata_example.zip |}} 
 + 
 +=== Kód === 
 + 
 + 
 +<code csharp MervisDB_GetData_Example.cs> 
 +using ESG.Core.Access.Client; 
 +using ESG.Db.Server.Shared; 
 +using ESG.Db.ServerAccess; 
 +using System; 
 +using System.Collections.Generic; 
 +using System.Linq; 
 +using System.Threading.Tasks; 
 + 
 +namespace DbClientTest 
 +{ 
 + class Program 
 + { 
 + static async Task Main(string[] args) 
 + { 
 + try 
 + { 
 + // 
 + // Create access to the real server. 
 + // Without SSL connections, you have to remove binding parameters "<security mode="Transport"/>" in the App.config. 
 + // The client is automatically generated from the WSDL file available here: https://kb.mervis.info/doku.php/en:mervis-db:10-api 
 + // 
 + using (HistoryDbAccessClient client = new HistoryDbAccessClient(HistoryDbAccessClient.EndpointConfiguration.HistoryAccess, "https://localhost:9876/RcWareDbAccess")) 
 + { 
 + // Authentication credetials in the database. 
 + Credentials credentials = new Credentials 
 + { 
 + Name = "XXXX", 
 + Password = "YYYY" 
 + }; 
 + 
 + // Specification of the variables through Key-Value. 
 + // Here we use 2 variables. 
 + ESG.Db.Server.Shared.KeyValuePair[][] keys = new ESG.Db.Server.Shared.KeyValuePair[][] { 
 + new ESG.Db.Server.Shared.KeyValuePair[] { 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "DPGuid","338E2882-D72B-4D17-A241-73E8BC30F458"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "StationName", "AAABBB") 
 + }, 
 +    new ESG.Db.Server.Shared.KeyValuePair[] { 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "DPGuid", "CC80211D-3D29-4CC2-91A2-F69483D566B5"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "StationName", "AAABBB") 
 + } 
 + }; 
 + 
 + // From-To dates. The dates must be specified in the UTC time zone. 
 + DateTime utcTo = DateTime.UtcNow; 
 + DateTime utcFrom = DateTime.UtcNow.AddDays(-1); 
 + 
 + // Retrieving the data goes through cycling of values and variables. The server returns recommended values needed for the the next cycle. 
 + int variableOffset = 0; // the offset of the variable 
 + int variableCount = 10; // maximal number of variables returned in one request 
 + int valueOffset; // the offset of the value 
 + int valueCount = 1000; // maximal values in on request 
 + 
 + Console.WriteLine("Reading values..."); 
 + 
 + do 
 + { 
 + valueOffset = 0; 
 + do 
 + { 
 + // Execute the request. 
 + var result = await client.GetDataAsyncAsync(credentials, keys, utcFrom, utcTo, variableOffset, variableCount, valueOffset, valueCount); 
 + 
 + // Check the return code. "0;OK" is what we want. 
 + if (!result.ReturnCode.StartsWith("0;")) 
 + { 
 + Console.WriteLine("Error on reading: {0}", result.ReturnCode); 
 + } 
 + 
 + // Cycle through the data and print it out. 
 + foreach (var valRecord in result.Data) 
 + { 
 + Console.WriteLine("Variable: {0}", String.Concat(valRecord.Keys.Select((i) => 
 + { 
 + return String.Format("{0}={1}; ", i.Key, i.Value); 
 + }))); 
 + 
 + foreach (var value in valRecord.Values) 
 + { 
 + Console.WriteLine("{0}->{1} [{2}] {3}", value.UtcTimeStamp, value.GoodThrough, value.HistoryValueType, value.DoubleValue /* Use value type according to the Hvt (History Value Type) */ ); 
 + } 
 + } 
 + 
 + valueOffset = result.NextValueOffset; 
 + variableOffset = result.NextVariableOffset; 
 + } 
 + while (valueOffset != -1); 
 + } 
 + while (variableOffset != -1); 
 + } 
 + 
 + } 
 + catch (Exception exc) 
 + { 
 + Console.WriteLine("Exception: {0}", exc.ToString()); 
 + } 
 + 
 + Console.WriteLine("DB communication finished"); 
 + 
 + Console.ReadLine(); 
 + } 
 + 
 + } 
 +}</code> 
 + 
 +<code csharp MervisDB_SaveData_Example.cs> 
 +using System; 
 +using System.Collections.Generic; 
 +using System.Threading.Tasks; 
 +using MervisDb_SaveData_Example.MervisDbService; 
 + 
 +namespace MervisDb_SaveData_Example 
 +{ 
 + class Program 
 + { 
 + static async Task Main(string[] args) 
 + { 
 + try 
 + { 
 + // 
 + // Create access to the real server. 
 + // Without SSL connections, you have to remove binding parameters "<security mode="Transport"/>" in the App.config. 
 + // The client is automatically generated from the WSDL file available here: https://kb.mervis.info/doku.php/en:mervis-db:10-api 
 + // 
 + using (HistoryDbAccessClient client = new HistoryDbAccessClient(HistoryDbAccessClient.EndpointConfiguration.HistoryAccess, "https://localhost:9876/RcWareDbAccess")) 
 + { 
 + // Authentication credetials in the database. 
 + Credentials credentials = new Credentials { Name = "XXXX", Password = "YYYY" }; 
 + 
 + // Adding records... 
 + List<ValueRecord> records = new List<ValueRecord>(); 
 + 
 + DateTime utcTimeStamp = new DateTime(2018, 1, 1, 12, 0, 0, DateTimeKind.Utc); 
 + 
 + // Each value is stored in a ValueRecord structure 
 + ValueRecord rec = new ValueRecord(); 
 + 
 + rec.UtcTimeStamp = utcTimeStamp;                // time stamp of the value, UTC date time must be used 
 + rec.HistoryValueType = HistoryValueType.Double; // type of the value 
 + rec.DoubleValue = 23.4;                         // value itself 
 + rec.Interval = 60.0;                            // sampling period in seconds. When the difference of timestamps of subsequent values if greater than 1.1 multiple of the interval, the data should be considered incomplete. 
 + rec.Keys = new ESG.Db.Server.Shared.KeyValuePair[] // identification of the variable. At least one key-value pair must be "IsKey" to identify a variable. 
 + { 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "Root", "Building A"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "Level1", "Floor 1"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "Level2", "Room 7"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "Level3", "Temperature"), 
 + new ESG.Db.Server.Shared.KeyValuePair(false, "Description", "Temperature in the room 7"), 
 + new ESG.Db.Server.Shared.KeyValuePair(false, "Unit", "°C"), 
 + }; 
 + 
 + records.Add(rec); 
 + 
 + // Save data method returns the number of stored records  
 + int recordsSaved = await client.SaveDataAsync(credentials, records.ToArray()); 
 + 
 + Console.WriteLine("Records saved: {0}", recordsSaved); 
 + } 
 + 
 + } 
 + catch (Exception exc) 
 + { 
 + Console.WriteLine("Exception: {0}", exc.ToString()); 
 + } 
 + 
 + Console.WriteLine("DB communication finished"); 
 + 
 + Console.ReadLine(); 
 + } 
 + } 
 +}</code> 
 + 
 + 
 + 
 + 
 +<code csharp MervisDb_ReplaceData_Example.cs> 
 +using ESG.Core.Access.Client; 
 +using ESG.Db.Server.Shared; 
 +using ESG.Db.ServerAccess; 
 +using System; 
 +using System.Collections.Generic; 
 + 
 +namespace DbClientTest 
 +{ 
 + class Program 
 + { 
 + static async Task Main(string[] args) 
 + { 
 + RcWareDbClient dbClient = new RcWareDbClient(false, "RcWareDbAccess", new Uri("http://localhost:9876/RcWareDbAccess")); 
 + dbClient.Credentials = new ESG.Db.Server.Shared.Credentials("xxxxxxx", "xxxxxxx"); 
 + 
 + DateTime utcNow = DateTime.UtcNow.Subtract(TimeSpan.FromMinutes(5)); 
 + 
 + ESG.Db.Server.Shared.KeyValuePair[] varKeysNew = new ESG.Db.Server.Shared.KeyValuePair[] 
 + { 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "DPGuid", "51111111-1234-1234-1234-123456789012"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "StationName", "db_replace_test") 
 + }; 
 + 
 + ESG.Db.Server.Shared.KeyValuePair[] varKeys1 = new ESG.Db.Server.Shared.KeyValuePair[] 
 + { 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "DPGuid", "60ace716-5e1e-4cf8-ab05-947dce0caf77"), 
 + new ESG.Db.Server.Shared.KeyValuePair(true, "SoftPlcRtId", "db_replace_test") 
 + }; 
 + 
 + ESG.Db.Server.Shared.KeyValuePair[] varKeys = varKeys1; 
 + 
 + // generate some records 
 + List<ValueRecord> recsToSave = new List<ValueRecord>(); 
 + TimeSpan recsLength = TimeSpan.FromMinutes(2); 
 + int recsPerMinute = 4; 
 + 
 + Random r = new Random((int)DateTime.UtcNow.Ticks); 
 + double rBase = r.NextDouble() * 10; 
 + 
 + for (int i = 0; i < (recsLength.TotalSeconds / 60) * recsPerMinute; i++) 
 + { 
 + recsToSave.Add(new ValueRecord(utcNow - recsLength + TimeSpan.FromMinutes(i * (1.0 / recsPerMinute)), rBase + ((i % 2) + 1) * (-4))); 
 + recsToSave[recsToSave.Count - 1].Keys = varKeys; 
 + recsToSave[recsToSave.Count - 1].Interval = 60 / recsPerMinute; 
 + 
 + recsToSave.Add(new ValueRecord(utcNow - recsLength + TimeSpan.FromMinutes(i * (1.0 / recsPerMinute)), rBase + ((i % 2) + 1) * (-4))); 
 + recsToSave[recsToSave.Count - 1].Keys = varKeysNew; 
 + recsToSave[recsToSave.Count - 1].Interval = 60 / recsPerMinute; 
 + } 
 + 
 + var res = await dbClient.ReplaceDataAsync(new List<ESG.Db.Server.Shared.KeyValuePair[]> { varKeys }, utcNow.Subtract(recsLength), utcNow, recsToSave.ToArray()); 
 + } 
 + } 
 +} 
 +</code> 
 + 
 +<code csharp MervisDb_GetTransformedData_Example.cs> 
 +using System; 
 +using System.Linq; 
 +using System.Threading.Tasks; 
 +using MervisDb_GetTransformedData_Example.MervisDbService; 
 + 
 +namespace MervisDb_GetTransformedData_Example 
 +{ 
 + class Program 
 + { 
 + static async Task Main(string[] args) 
 + { 
 + // 
 + // Create access to the real server. 
 + // Without SSL connections, you have to remove binding parameters "<security mode="Transport"/>" in the App.config. 
 + // The client is automatically generated from the WSDL file available here: https://kb.mervis.info/doku.php/en:mervis-db:10-api 
 + // 
 + try 
 + { 
 + using (HistoryDbAccessClient client = new HistoryDbAccessClient(HistoryDbAccessClient.EndpointConfiguration.HistoryAccess, "http://localhost:9876/RcWareDbAccess")) 
 + { 
 + // Authentication credentials in the database. 
 + Credentials credentials = new Credentials { Name = "XXXXX", Password = "YYYYY" }; 
 + 
 + // Specification of the variables through Key-Value. 
 + // Here we use 2 variables. 
 + ESG.Db.Server.Shared.KeyValuePair[][] variableKeys = new ESG.Db.Server.Shared.KeyValuePair[][] { 
 + new ESG.Db.Server.Shared.KeyValuePair[] { 
 + new ESG.Db.Server.Shared.KeyValuePair (/*IsKeyId*/ false, /*Key*/ "DPGuid", /*Value*/ "338E2882-D72B-4D17-A241-73E8BC30F458"), 
 + new ESG.Db.Server.Shared.KeyValuePair (/*IsKeyId*/ false, /*Key*/ "StationName", /*Value*/ "AAABBB") 
 + }, 
 + new ESG.Db.Server.Shared.KeyValuePair[] { 
 + new ESG.Db.Server.Shared.KeyValuePair (/*IsKeyId*/ false, /*Key*/ "DPGuid", /*Value*/ "CC80211D-3D29-4CC2-91A2-F69483D566B5"), 
 + new ESG.Db.Server.Shared.KeyValuePair (/*IsKeyId*/ false, /*Key*/ "StationName", /*Value*/ "AAABBB") 
 + } 
 + }; 
 + 
 + // Aggregation request 
 + var aggregation = new AggregationRequest(); 
 + aggregation.Types = new AggregationType[] { AggregationType.Last }; 
 + aggregation.Interpolation = InterpolationType.None; 
 + //aggregation.MaxNeighborDistance = ..only for interpolation; 
 + aggregation.IsoPattern = new string[] { "PT15M" }; // 15 min period (ISO 8601 duration pattern) 
 + aggregation.From = new DateTime(2018, 11, 24, 0, 0, 0, 0, DateTimeKind.Unspecified); 
 + aggregation.To = new DateTime(2018, 11, 25, 0, 0, 0, 0, DateTimeKind.Unspecified); 
 + aggregation.TimeZone = @"Europe/Prague"; 
 + 
 + // Retrieving the data goes through cycling of intervals and variables. The server returns recommended intervals needed for the the next cycle. 
 + int variableOffset = 0; // the offset of the variable 
 + int variableCount = 10; // maximal number of variables returned in one request 
 + int intervalOffset;       // the offset of the interval 
 + int intervalCount = 1000; // maximal values in on request 
 + 
 + Console.WriteLine("Reading values..."); 
 + 
 + do 
 + { 
 + intervalOffset = 0; 
 + 
 + do 
 + { 
 + // Execute the request. 
 + var result = await client.GetTransformedDataAsyncAsync(credentials, aggregation, variableKeys, variableOffset, variableCount, intervalOffset, intervalCount); 
 + 
 + // Check the return code. "0;OK" is what we want. 
 + if (!result.ReturnCode.StartsWith("0;")) 
 + { 
 + Console.WriteLine("Error on reading: {0}", result.ReturnCode); 
 + } 
 + 
 + // Cycle through the data and print it out. 
 + if (result.Data != null) 
 + { 
 + foreach (VariableAggregate vag in result.Data) 
 + { 
 + Console.WriteLine("Variable: {0}", String.Concat(vag.Keys.Select((i) => { return String.Format("{0}={1}; ", i.Key, i.Value); }))); 
 + 
 + foreach (Interval value in vag.Data) 
 + { 
 + Console.Write(" {0}->{1} quality: {2:0.00} ", value.Begin, value.End, value.DataQuality); 
 + 
 + if (value.Last != null) 
 + { 
 + Console.Write(" Last Value: {0} (stamp {1}, origin {2})", value.Last.Value, value.Last.Stamp, value.Last.Origin); 
 + } 
 + 
 + Console.WriteLine(); 
 + } 
 + } 
 + } 
 + 
 + variableOffset = result.NextVariableOffset; 
 + intervalOffset = result.NextIntervalOffset; 
 + 
 + } while (intervalOffset != -1); 
 + 
 + } while (variableOffset != -1); 
 + } 
 + 
 + Console.WriteLine("DB communication is running in background"); 
 + 
 + } 
 + catch (Exception exc) 
 + { 
 + Console.WriteLine("Exception: {0}", exc.ToString()); 
 + } 
 + 
 + Console.WriteLine("DB communication finished"); 
 + 
 + Console.ReadLine(); 
 + } 
 + } 
 +} 
 +</code> 
 + 
 + 
 +==== Matlab ==== 
 + 
 +{{ :en:mervis-db:mervisdb_matlab_api.png?direct&800 |}} 
 + 
 +=== Podporované funkce === 
 +^Function^Description| 
 +^SaveData|Save one or multiple records from one or multiple variables| 
 +^GetData|Read one or multiple records from one or multiple variables.| 
 +^GetDataUnmerged|Read one or multiple records from one or multiple variables. Allow more setting options than GetData function| 
 +^GetDataOrigin|Read data exactly as are stored in the database.| 
 +^DeleteVariable|Delete entire variable or some certain interval.| 
 +^GetRequiredTimestamp|Get time stamp depending on input options.| 
 + 
 +=== Toolbox === 
 + 
 + 
 +Pro komunikaci Matlabu s Mervis DB potřebujete nainstalovat toolbox:  
 +  * {{ :en:mervis-db:mervisdb_matlabtoolbox.zip |}}.  
 +  * Zobrazení nápovědy ke každé z funkcí je možné: <code matlab>help MervisDatabse.supported_function_name</code> 
 + 
 +=== Kód === 
 + 
 +<code matlab MervisDB_GetData_example.m>% Instance of Mervis DB  
 +mervisDB = MervisDatabase('username', 'password', 'dbUrl'); 
 + 
 +% Time interval definition 
 +from = localMatlab2utcMatlab(datenum(2017, 1, 1)); %1.1.2017 in utc 
 +to = localMatlab2utcMatlab(datenum(2017, 31, 1)); %31.1.2017 in utc 
 +samplePeriod = 5*60; % 5 minutes 
 +outputTimeZone = 'Local'; % possible 'Local' or  'Utc' parameter; 
 + 
 +% Specifying varibles to download 
 +varKeys1 = {'DPGuid', '338E2882-D72B-4D17-A241-73E8BC30F458';... 
 +            'StationName', 'XXXXXXX'}; % Keys definition of first variable 
 +varKeys2 = {'DPGuid', 'CC80211D-3D29-4CC2-91A2-F69483D566B5';... 
 +            'StationName', 'YYYYYYY'}; % Keys definition of second variable 
 +  
 +variable1 = MervisDbVariable(varKeys1); % Create MervisDbVariable object from defined keys 
 +variable2 = MervisDbVariable(varKeys2); 
 + 
 +arrayOfVarKeys = [variable1; variable2]; % array of MervisDbVariables objects 
 +  
 +% help for function getData 
 +help MervisDatabase.getData  
 + 
 +% Download required data 
 +[data, time] = mervisDB.getData(arrayOfVarKeys, from, to, samplePeriod, outputTimeZone); 
 + 
 +% Get all variables with defined keys 
 +allVaribales = mervisDB.getAllVars(varKeys1);</code> 
 + 
 + 
 +==== PHP ==== 
 + 
 +=== Kód === 
 + 
 + 
 +<code php MervisDB_GetData_example.php> 
 +<?php 
 +/* 
 +Mervis DB PHP example - getdata 
 +*/ 
 +try { 
 + 
 +  $soapClient = new SoapClient('./wsdl/singlewsdl.xml', array( 
 +    'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP, 
 +    'trace' => 0, 
 +    'features' => SOAP_SINGLE_ELEMENT_ARRAYS 
 +  )); 
 +  $soapClient->__setLocation('http://localhost:9876/RcWareDbAccess'); 
 + 
 +  $credentials = array( 
 +    'Name' => 'XXXXXXX', 
 +    'Password' => 'YYYYYYY' 
 +  ); 
 + 
 +  $utcTZ   = new DateTimezone('UTC'); //all time realted values are expected in UTC 
 +  $utcFrom = new DateTime('-120minutes', $utcTZ); // 
 +  $utcTo   = new DateTime('now', $utcTZ); // 
 + 
 +  $valOffset = 0; 
 +  $valCount  = 20; //how many values should be returned in one request at most. Recommended value: 5000 
 +  $varOffset = 0; 
 +  $varCount  = 4; //how many variable should be returned in on request at most 
 + 
 +  $variablesKey = array( 
 +    array( 
 +      array( 
 +        'IsKey' => true, 
 +        'Key' => 'DPGuid', 
 +        'Value' => '338E2882-D72B-4D17-A241-73E8BC30F458' 
 +      ), 
 +      array( 
 +        'IsKey' => true, 
 +        'Key' => 'StationName', 
 +        'Value' => 'AAAAAAAAAA' 
 +      ) 
 +    ), 
 +    array( 
 +      array( 
 +        'IsKey' => true, 
 +        'Key' => 'DPGuid', 
 +        'Value' => 'CC80211D-3D29-4CC2-91A2-F69483D566B5' 
 +      ), 
 +      array( 
 +        'IsKey' => true, 
 +        'Key' => 'StationName', 
 +        'Value' => 'BBBBBBB' 
 +      ) 
 +    ) 
 +  ); 
 + 
 +  echo "Reading values from: {$utcFrom->format('c')} to: {$utcTo->format('c')}\n\n"; 
 + 
 +  $counter = 0; 
 + 
 +  do { 
 +    $response  = null; 
 +    $valOffset = 0; 
 +    do { 
 +      $response  = $soapClient->GetData(array( 
 +        'credentials' => $credentials, 
 +        'variablesKey' => $variablesKey, 
 +        'utcFrom' => $utcFrom->format('Y-m-d\TH:i:s\Z'), 
 +        'utcTo' => $utcTo->format('Y-m-d\TH:i:s\Z'), 
 +        'valueOffset' => $valOffset, 
 +        'valueCount' => $valCount, 
 +        'variableCount' => $varCount, 
 +        'variableOffset' => $varOffset 
 +      )); 
 +      $valOffset = $response->nextValueOffset; 
 +      $varOffset = $response->nextVariableOffset; 
 + 
 +      foreach ($response->GetDataResult->Mvr as $varArray) { 
 +        foreach ($varArray->Keys->KeyValuePair as $kvp) //the set of keys depends on the source of the data 
 +          { 
 +          if ($kvp->Key == 'DPName') { 
 +            echo "\n{$kvp->Value}\n"; 
 +            $counter++; 
 +          } 
 +        } 
 + 
 +        if (isset($varArray->Vals->I)) { 
 +          foreach ($varArray->Vals->I as $val) { 
 +            echo "  t: {$val->Ts}   Interval: {$val->Ivl}  {$valOffset} {$varOffset}\n"; 
 +          } 
 +        } else { 
 +          echo "empty\n"; 
 +        } 
 + 
 +      } 
 + 
 +    } while ($response->nextValueOffset != -1); //-1 - no more data available 
 +  } while ($response->nextVariableOffset != -1); //-1 - no more data available 
 +} 
 +catch (Exception $e) { 
 +  print_r($e); 
 +} 
 +?> 
 +</code>
  
 \\ \\
  
  
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