Differences

This shows you the differences between two versions of the page.

--- en:mervis-scada:50-api [2020/04/06 13:14]
m.chlupac [api/set/history]
+++ en:mervis-scada:50-api [2026/07/17 12:41] (current)
z.moustis
@@ Line 1: / Line 1: @@
-====== API ======
+====== Mervis SCADA API ======
-Mervis SCADA offers open REST-like API based on JSON and XML data formats. For full description please contact our [[:en:help:support|technical support]].
+Mervis SCADA offers an open, REST-like API based on JSON and XML data formats for seamless integration with third-party applications. For a full description of advanced features, please contact our [[:en:help:20-support|technical support]].
-**Important:** Only officially supported response format is XML!
+**Important Note on Formatting:** While JSON is heavily utilized in newer endpoints, the only officially supported backward-compatible response format across the entire legacy API is XML.
-===== List of basic API methods =====
-^Function^Description|
+===== Supported API Methods =====
-^api/checkCredentials||
-^api/logout||
-^api/get/projects||
-^api/get/projectData||
-^api/get/projectByParts||
-^api/get/history||
-^api/get/history/specific||
-^api/set/history||
-^api/get/values||
-^api/get/alarms||
-^api/get/alarmHistory||
-^api/get/eventHistory||
-^api/get/changes||
-^api/set/executeActions||
-^api/set/values||
-^api/set/executeAlarmOps||
-^api/set/projectPriorityRefresh||
-^api/get/schema||
-^api/get/schema/datapoints||
-^api/get/schema/values||
-^api/get/schema/image||
+Below is the consolidated list of recommended API endpoints. Note: Only methods with fully documented and verified examples are listed below.
+^ Function ^ Description |
+| **Authentication** | |
+| ''api/v2/get/authenticate'' | Authenticates a user and returns a session token for subsequent API calls. |
+| **Project & Data Structure** | |
+| ''api/get/projects'' | Retrieves a list of all projects accessible to the logged-in user. |
+| ''api/get/projectByParts'' | Retrieves the visual tree structure and the list of datapoints within a specific project. |
+| **Reading Data** | |
+| ''api/get/values'' | Retrieves the current, real-time values of specified datapoints. |
+| ''api/v3/get/history'' | Downloads historical trend data for one or multiple series in a single, paginated call. |
+| ''api/get/history/specific'' | Retrieves specific historical datapoints relative to a provided reference time. |
+| **Writing & Execution** | |
+| ''api/set/values'' | Writes new values to specified datapoints. |
+| ''api/set/executeActions'' | Executes predefined actions or buttons (e.g., INIT, ZAP commands) on datapoints. |
+| ''api/set/history'' | Inserts new historical data values into the database. |
+| ''api/replace/history'' | Completely replaces existing historical data within a specified time range. |
+**Note on Credentials:** You can test these API calls using the credentials `n: demo` and `p: demo`. For production applications, it is required to exchange these credentials for a token using `api/v2/get/authenticate` and use the resulting token (`t: [token_string]`) in subsequent calls to ensure optimal performance.
-===== Example =====
+===== Authentication =====
-====api/checkCredentials====
+==== api/v2/get/authenticate ====
+**Request:**
+  * **URL:** ''/api/v2/get/authenticate?format=json''
+  * **Method:** POST
-**Request**
+Standard login:
+<code javascript>
+{"data":{"cred":{"n":"demo","p":"demo"}}}
+</code>
-   * URL: /api/checkCredentials?format=xml
+Domain-specific login:
-   * Method: POST
+<code javascript>
+{"data":{"cred":{"d":"GlobalDomain","n":"demo","p":"demo"}}}
+</code>
-**Request**
+**Response Properties:**
+  * **token** (string) - Authentication token for calling other API methods.
+  * **tokenValidFor** (TimeSpan) - The duration for which the provided token is valid (e.g., "P1D" = 1 day).
+  * **changePwdBefore** (DateTime or null) - Specifies the date and time by which the current password must be changed.
 <code javascript>
-{"cred":{"n":"demo","p":"demo"}}
+{
+    "data": {
+        "ChangePwdBefore": null,
+        "ClientType": 2,
+        "Domain": "3c73477a-6c95-4939-b047-7bbf902bcef1",
+        "DomainName": "GlobalDomain",
+        "FullName": "GlobalDomain\\demo",
+        "Login": "demo",
+        "NotifyNearingPwdExpirationIn": null,
+        "Token": "3:b83d56f8-2e25-4745-a4e5-1a259c286c5f",
+        "TokenValidFor": "P1D",
+        "User": "48141739-5d16-4ca3-8ae1-33e27d9eb22e",
+        "Username": ""
+    },
+    "result": { "code": 0, "codeTxt": null, "dataType": null, "desc": null }
+}
 </code>
-**Response**
+===== Reading Data =====
+==== api/get/values ====
+Retrieves current values of data points (property "Output") from one or multiple projects.
+**Request:**
+  * **URL:** ''/api/get/values?format=xml''
+  * **Method:** POST
+<code javascript>
+{
+ "cred": {
+  "n": "demo",
+  "p": "demo"
+ },
+ "propNamesToSerialize": ["Output"],
+ "offset": 0,
+ "count": 1000,
+ "serverState": null,
+ "dps": [{
+   "projId": "5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
+   "dpIds": ["62cf4083-31ed-4bc1-be25-044ba837a9f0"]
+  }]
+}
+</code>
+**Response:**
 <code xml>
 <?xml version="1.0" encoding="utf-8"?>
-<checkCredentialsResult xmlns:r="http://dev.rcware.eu/serialization/references" d="GlobalDomain" l="demo" t="2:85be00d3-5875-4dec-a9b4-c98e2ff2acbe" xmlns="http://dev.rcware.eu/auth" />
+<values xmlns:r="http://dev.rcware.eu/serialization/references" nextOffset="-1" serverTime="2026-07-17T10:29:17Z" xmlns:n1="http://dev.rcware.eu/scada/basic-props" xmlns="http://dev.rcware.eu/scada/datapoints">
+ <vals>
+  <v projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" serverTime="2026-07-17T10:29:17Z">
+   <dps>
+    <d id="62cf4083-31ed-4bc1-be25-044ba837a9f0" serAlr="true">
+     <props>
+      <p n="Output" t="2026-07-17T10:29:17Z" q="Good" r:type="b133774d-21ce-42b6-add3-57c012079c55">
+       <n1:v>13851.42</n1:v>
+      </p>
+     </props>
+    </d>
+   </dps>
+  </v>
+ </vals>
+</values>
 </code>
-  * You **should** use the received token **t** in subsequent API calls.
+==== api/v3/get/history ====
+Downloading one or multiple trends with a single API call.
-====api/get/history====
-**Request**
+**Rules:**
+  * Items "segmentation", "requestState", and "serverState" should always copy the values from the last server response for pagination. The first call should use an empty "segmentation".
-   * URL: /api/get/history?format=xml
+**Request:**
-   * Method: POST
+  * **URL:** ''/api/v3/get/history?format=json''
+  * **Method:** POST
 <code javascript>
 {
-   "cred":{
+    "credentials": {
-      "n":"demo", //username
+        "name": "demo",
-      "p":"demo" //password
+        "password": "demo"
-   },
+    },
-   "projId":"5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0", //project ID
+    "request": {
-   "dpId":"62cf4083-31ed-4bc1-be25-044ba837a9f0",  //single datapoint ID
+        "commonSeriesParameters": {
-   "from":"/Date(1541199600000)/", //UTC in ms
+            "from": "2026-06-20T00:00:00Z",
-   "to":"/Date(1541496190357)/",  //UTC in ms
+            "to": "2026-07-17T00:00:00Z"
-   "offset":0,
+        },
-   "count":5000,
+        "series": [
-   "historyState":"" //client has to send historyState value from the last response with the following request
+            {
+                "clientReference": "test1",
+                "provider": {
+                    "parameters": {
+                        "projectId": "5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
+                        "dataPointId": "62cf4083-31ed-4bc1-be25-044ba837a9f0"
+                    }
+                }
+            }
+        ]
+    },
+    "dataSpecification": {
+        "limits": { "count": 1000 }
+    },
+    "segmentation": {
+        "requestState": "",
+        "serverState": ""
+    }
 }
 </code>
-**Response**
+**Response Details:**
+  * **v** - value
+  * **ts** - timestamp (start of validity period)
+  * **gt** - goodthrough (end of validity period)
+  * **meta.interval** - expected interval between stored records. Useful to identify missing data.
-<code xml>
+<code javascript>
-<?xml version="1.0" encoding="utf-8"?>
+{
-<getHistoryResult xmlns:r="http://dev.rcware.eu/serialization/references" r:type="b133774d-21ce-42b6-add3-57c012079c55" xmlns:n1="http://dev.rcware.eu/scada/basic-props" xmlns="http://dev.rcware.eu/scada/history">
+    "result": { "code": 0, "subCode": 0, "message": "" },
-  <!--
+    "data": {
-  @Interval - ISO interval of trend values defined by the database client.
+        "count": 1,
-  @historyState - to be copied into the next request
+        "historyData": [
-  @nextValOfs - to be copied into the next request until value -1 is reached.
+            {
-  If ts of value in not within the interval time span after the previous value's gt - some data is missing.
+                "clientReference": "test1",
+                "provider": {
-  -->
+                    "id": "689e32fa-24a2-448e-9374-6158e6e6cb15",
-  <hist projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" dpId="62cf4083-31ed-4bc1-be25-044ba837a9f0" propName="Output" interval="PT3M" historyState="" nextValOfs="-1">
+                    "parameters": {
-    <errMsg/>
+                        "projectId": "5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
-    <vals>
+                        "dataPointId": "62cf4083-31ed-4bc1-be25-044ba837a9f0"
-      <!--ts - time stamp, gt - good through, value is valid in the whole time span between these two-->
+                    }
-      <hv ts="2018-11-02T21:26:08.7936747Z" gt="2018-11-03T20:35:08.8060769Z">
+                },
-        <n1:v>12754</n1:v>
+                "meta": { "type": "double", "unit": "h", "interval": "PT3M" },
-      </hv>
+                "values": [
-      <hv ts="2018-11-03T20:41:09.0100479Z" gt="2018-11-05T11:35:08.7415158Z">
+                    { "v": 13851.4, "ts": "2026-06-25T12:00:00.000Z" }
-        <n1:v>12754</n1:v>
+                ]
-      </hv>
+            }
-      <hv ts="2018-11-05T11:40:04.0077949Z" gt="2018-11-05T17:25:03.4285643Z">
+        ]
-        <n1:v>12754</n1:v>
+    },
-      </hv>
+    "segmentation": { "requestState": "", "serverState": "" }
-      <hv ts="2018-11-05T17:28:03.4133447Z" gt="2018-11-05T19:40:03.0246122Z">
+}
-        <n1:v>12755</n1:v>
+</code>
-      </hv>
-      <hv ts="2018-11-05T19:43:03.6499981Z" gt="2018-11-05T22:01:03.2620552Z">
-        <n1:v>12756</n1:v>
-      </hv>
-      <hv ts="2018-11-05T22:04:03.1530787Z" gt="2018-11-06T02:37:03.454926Z">
-        <n1:v>12757</n1:v>
-      </hv>
-      <hv ts="2018-11-06T02:40:03.61157Z" gt="2018-11-06T04:52:03.1759539Z">
-        <n1:v>12758</n1:v>
-      </hv>
-      <hv ts="2018-11-06T04:55:03.14511Z" gt="2018-11-06T06:40:03.8621601Z">
-        <n1:v>12759</n1:v>
-      </hv>
-      <hv ts="2018-11-06T06:43:03.2063072Z" gt="2018-11-06T08:55:03.3019409Z">
-        <n1:v>12760</n1:v>
-      </hv>
-      <hv ts="2018-11-06T08:58:03.083875Z" gt="2018-11-06T09:10:03.0695797Z">
-        <n1:v>12761</n1:v>
-      </hv>
-      <hv ts="2018-11-06T09:13:03.5389214Z" gt="2018-11-06T09:19:03.5238805Z">
-        <n1:v>12761</n1:v>
-      </hv>
-      <!-- value without gt - ts and gt are equal-->
-      <hv ts="2018-11-06T09:22:03.9461503Z">
-        <n1:v>12761</n1:v>
-      </hv>
-    </vals>
-  </hist>
-</getHistoryResult>
+==== api/get/history/specific ====
+**Request:**
+  * **URL:** ''/api/get/history/specific?format=json''
+  * **Method:** POST
+  * **dataSpec:** Defines the specific point to fetch (e.g., 2 = First value less than reference time).
+  * **refTime:** Reference time required for specific temporal searches.
+<code javascript>
+{
+ "cred": {
+  "n": "demo",
+  "p": "demo"
+ },
+ "projId": "5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
+ "offset": 0,
+ "count": 1000,
+ "dataSpec": 2,
+ "refTime": "\/Date(1692788459000)\/",
+ "dpIds": ["62cf4083-31ed-4bc1-be25-044ba837a9f0"]
+}
 </code>
+===== Writing Data & Execution =====
-====api/set/history====
+==== api/set/values ====
+**Request:**
+  * **URL:** ''/api/set/values?format=xml''
+  * **Method:** POST
-**Request**
+<code xml>
+<?xml version="1.0" encoding="UTF-8"?>
+<setValuesRequest xmlns:r="http://dev.rcware.eu/serialization/references" xmlns="http://dev.rcware.eu/scada/datapoints" xmlns:n2="http://dev.rcware.eu/auth" xmlns:n1="http://dev.rcware.eu/scada/comm-props" >
+   <n2:cred n="demo" p="demo"/>
+        <values projId="1b2623be-eaa4-4e29-8596-c66dd85d5643">
+            <dps>
+                <d id="07d538d9-9f4b-46ca-ba4d-13b13b5302ff">
+                    <props>
+                        <p n="Source" t="2024-02-23T09:58:00Z" r:type="1c104bdf-ffcb-4c90-b491-e4781a91ef09">
+                            <n1:v>23</n1:v>
+                        </p>
+                    </props>
+                </d>
+            </dps>
+        </values>
+</setValuesRequest>
+</code>
-   * URL: /api/set/history?format=xml
+==== api/set/executeActions ====
-   * Method: POST
+**Request:**
+  * **URL:** ''/api/set/executeActions?format=xml''
+  * **Method:** POST
-Attribute **i** sets **interval** ([[https://en.wikipedia.org/wiki/ISO_8601#Time_intervals|ISO 8601]]) in which the next value should be expected to be saved into database.
+<code xml>
+<?xml version="1.0" encoding="UTF-8"?>
+<executeActionsRequest xmlns="http://dev.rcware.eu/scada/action-defs" xmlns:n2="http://dev.rcware.eu/scada/basic-props" xmlns:n1="http://dev.rcware.eu/auth" xmlns:r="http://dev.rcware.eu/serialization/references">
+  <n1:cred n="demo" p="demo"/>
+  <actionDefs projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0">
+    <actions>
+      <actionDefItem propName="INIT" dpId="afc22e18-f8e4-4e08-899c-fb9e4759df3d">
+        <execParam r:type="495c9644-eed1-4b94-933b-3fae702a9aca">
+          <n2:value>16</n2:value>
+        </execParam>
+      </actionDefItem>
+      <actionDefItem propName="ZAP" dpId="34306c80-73f1-4465-ab51-2b2c1e85ab70">
+      </actionDefItem>
+    </actions>
+  </actionDefs>
+</executeActionsRequest>
+</code>
-Even though there could be used name and password in **cred** - you should always use **token** to get the best performance.
+==== api/set/history & api/replace/history ====
+Attribute **i** sets **interval** (ISO 8601) in which the next value should be expected. All date/time values must be in UTC.
-All date and time values are supposed to be in UTC.
+**Replace History Request Example:**
+  * **URL:** ''/api/replace/history?format=xml''
+  * **Method:** POST
 <code xml>
 <?xml version="1.0" encoding="UTF-8"?>
-<setHistoryRequest xmlns="http://dev.rcware.eu/scada/history"
+<replaceHistoryRequest xmlns="http://dev.rcware.eu/scada/history" xmlns:n2="http://dev.rcware.eu/auth" xmlns:n1="http://dev.rcware.eu/scada/basic-props" projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" dpId="e86dba6d-1250-4e7f-aafb-84fd28324710" from="2020-03-15T11:00:00+00:00" to="2020-03-18T11:00:00+00:00">
-xmlns:n2="http://dev.rcware.eu/auth"
+  <n2:cred n="demo" p="demo"/>
-xmlns:n1="http://dev.rcware.eu/scada/basic-props"
-projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0"
-dpId="e86dba6d-1250-4e7f-aafb-84fd28324710">
-  <n2:cred t="xxxxx"/><!-- token should be always used here -->
   <vals>
     <hv ts="2020-03-15T11:00:00+00:00" i="P1D">
@@ Line 167: / Line 276: @@
     <hv ts="2020-03-16T11:00:00+00:00" i="P1D">
       <n1:v>3.0</n1:v>
-    </hv>
-    <hv ts="2020-03-17T11:00:00+00:00" i="P1D">
-      <n1:v>2.0</n1:v>
-    </hv>
-    <hv ts="2020-03-18T11:00:00+00:00" i="P1D">
-      <n1:v>2.3</n1:v>
     </hv>
   </vals>
-</setHistoryRequest></code>
+</replaceHistoryRequest>
+</code>
-**Response**
+===== Projects Management =====
-   * 200 OK
+==== api/get/projects ====
+**Request:**
+  * **URL:** ''/api/get/projects?format=xml''
+  * **Method:** POST
-====api/set/executeActions====
+<code javascript>
+{
-**Request**
+ "cred": {
+  "n": "demo",
-   * URL: /api/set/executeActions?format=xml
+  "p": "demo"
-   * Method: POST
+ },
+ "offset": 0,
+ "count": 250
+}
+</code>
+**Response:**
 <code xml>
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="utf-8"?>
-<executeActionsRequest xmlns="http://dev.rcware.eu/scada/action-defs"
+<getProjectsResult xmlns:r="http://dev.rcware.eu/serialization/references" xmlns="http://dev.rcware.eu/scada/projects">
-xmlns:n2="http://dev.rcware.eu/scada/basic-props"
+    <projects>
-xmlns:n1="http://dev.rcware.eu/auth"
+        <project id="2a7f1615-..." name="Weather" />
-xmlns:r="http://dev.rcware.eu/serialization/references">
+        <project id="1b2623be-eaa4-4e29-8596-c66dd85d5643" name="SIMPLE_DEMO" />
-  <n1:cred n="userName" p="password"/>
+        <project id="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0" name="PLYNOVA_KOTELNA" />
-  <actionDefs projId="5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0">
+        <project id="b9ad5380-..." name="CVUT_HERBERTOV" />
-    <actions>
+        <project id="843855a2-..." name="PRVNI_KROKY" />
-      <actionDefItem propName="INIT" dpId="afc22e18-f8e4-4e08-899c-fb9e4759df3d">
+    </projects>
-        <execParam r:type="495c9644-eed1-4b94-933b-3fae702a9aca">
+</getProjectsResult>
-          <n2:value>16</n2:value>
+</code>
-        </execParam>
-      </actionDefItem>
-      <actionDefItem propName="ZAP" dpId="34306c80-73f1-4465-ab51-2b2c1e85ab70">
-      </actionDefItem>
-    </actions>
-  </actionDefs>
-</executeActionsRequest></code>
-**Response**
+==== api/get/projectByParts ====
+To get the visual tree and list of datapoints.
-<code xml><?xml version="1.0" encoding="utf-8"?>
+**Request:**
-<executeActionsResponse xmlns:r="http://dev.rcware.eu/serialization/references" code="Ok" message="OK" xmlns="http://dev.rcware.eu/scada/error-reporting" /></code>
+  * **URL:** ''/api/get/projectByParts?format=xml''
+  * **Method:** POST
+<code javascript>
+{
+ "cred": {
+  "n": "demo",
+  "p": "demo"
+ },
+ "projId": "5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0",
+ "treeId": "Visual tree",
+ "partType": 0,
+ "offset": 0,
+ "count": 250
+}
+</code>
 ===== Matlab Client =====
-==== General notes client function parameters ====
-  * parameter names ID and Guid are used interchangeably in the Matlab client, it is always a universally unique identifier referring to project or a particular datapoint
-  * when plural is used, array of guids is expected (ie. {'guid1', 'guid2'}), otherwise just one guid is expected (ie. 'guid1')
-==== Data download example ====
+==== General Notes ====
+  * Parameter names **ID** and **Guid** are used interchangeably in the Matlab client; it is always a universally unique identifier referring to a project or datapoint.
+  * When plural is used, an array of guids is expected (ie. ''{'guid1', 'guid2'}'' ), otherwise just one guid is expected.
-<code matlab>scada = ScadaClient('https://scada.mervis.info/','demo','demo');
+==== ScadaClient ====
+<code matlab>ScadaClient(url, username, password)</code>
+Constructor of the Mervis API wrapper.
+==== findAllDPsWithReqTags ====
+<code matlab>findAllDPsWithReqTags(projIds, tags)</code>
+Returns list of datapoints based on tags query. Example of tags definition: ''{'label','indoor_air_temperature';'room_type','office'}''
+==== getDpTags ====
+<code matlab>getDpTags(projectId, DpId)</code>
+Returns tags of the particular datapoint.
+==== getAllProjectDPs ====
+<code matlab>getAllProjectDPs(projectGuid)</code>
+Returns project IDs and names that are accessible to the logged-in user.
+==== getData ====
+<code matlab>[data, time, dataInCell, info] = getData(projID, dpsIds, from, to, span, zone, doublesInterpolationMethod, interpolate_gaps_shorter_than)</code>
+Downloads data.
+  * **span:** sampling interval in seconds, default is 300 sec.
+  * **zone:** time zone ('local' or 'utc') applied to parameters and output, default is 'local'.
+  * **Returns:** ''data'' (NaN used for missing values), ''time'', ''dataInCell'' (useful for strings), and ''info''.
+**Data Download Example:**
+<code matlab>
+scada = ScadaClient('https://scada.mervis.info/','demo','demo');
 dataPointIDs = {'acad79f3-3358-42dd-9b74-98733e63d771','1afa7d9b-1183-4ab1-a6b1-18e464ae2d4d','e496bb8c-14ce-4c2c-b53b-3b71daeabca6'};
 projectId = '5abf8ca0-94ba-48df-8d3c-7ebe87a12fd0';
-chartLegend = {'/Plynová kotelna/ÚT1 - SEVER/TEPLOTA UT1','/Plynová kotelna/ÚT1 - SEVER/TEPLOTA UT1 zpátečka','/Plynová kotelna/ÚT1 - SEVER/Poloha ventilu'};
+chartLegend = {'Temp UT1','Temp UT1 Return','Valve Position'};
 from = now - 4;
 to = now;
@@ Line 234: / Line 378: @@
 plot(time,data);
 legend(chartLegend);
-datetick;</code>
+datetick;
+</code>
-==== ScadaClient ====
-<code matlab>ScadaClient(url, username, password)</code>
-Constructor of Mervis API wrapper.
-==== findAllDPsWithReqTags ====
+==== saveData ====
-<code matlab>findAllDPsWithReqTags(projIds, tags)</code>
-Returns list of datapoints based on tags query. Example of tags definition: {'label','indoor_air_temperature';'room_type','office'}
-==== saveData====
 <code matlab>saveData(projID, dpID, time, data)</code>
 Saves data into the Mervis database.
-==== deleteVariable ====
-<code matlab>deleteVariable(projGuid, dpGuid, from, to)</code>
-Deletes data of one variable based on from - to interval. If from - to is not defined, all data are deleted. Use carefully, there is no undo!
 ==== setDataPointValue ====
 <code matlab>setDataPointValue(projGuid, dpGuid, value, buttonName)</code>
-Sets data point value using a button (primary the INIT button). Only numerical values are supported. Parameter buttonName is not mandatory. Value 'INIT' is used if buttonName is not defined.
+Sets a datapoint value using a button. Only numerical values are supported. Parameter ''buttonName'' is not mandatory; 'INIT' is used if undefined.
-{{ :en:mervis-scada:init.png?direct&800 |}}
 **Example:**
@@ Line 267: / Line 393: @@
 dpGuid = 'ccaacb77-295b-48a8-a712-3fb272aa9b6f';
 projectId = '6b65447e-8622-4a0d-b3b9-42f1d905fdaa';
-buttonName = 'INIT' %see action ("button") name in Mervis SCADA GUI
+buttonName = 'INIT';
 newValue = 1;
-scada = ScadaClient('https://scada.mervis.info/','username','password');
+scada = ScadaClient('https://scada.mervis.info/','demo','demo');
 scada.setDataPointValue(projectId, dpGuid, newValue, buttonName)
 </code>
-==== getData====
-<code matlab>[data, time, dataInCell, info] = getData(projID,dpsIds,from,to,span,zone,doublesInterpolationMethod, interpolate_gaps_shorter_than)</code>
-Downloads data. Span is a sampling interval in seconds, default is 300 sec. Zone is time zone 'local' or 'utc' is applied to from/to parameters as well as to output time, default is 'local'. DoubleInterpolationMethod is same as e.g. interp1, applied to double values only the other types use method 'previous'. Interpolate_gaps_shorter_than - interpolates missing values periodes that are not shorer than this parameter (in seconds). Return parameters: data - downloaded data resampled, NaN is used for missing values; time - datenum time axis according to selected zone; dataInCell - usefull for strings; info - summary info about the request.
-==== getDpTags====
+==== deleteVariable ====
-<code matlab>getDpTags(projectId, DpId) </code>
+<code matlab>deleteVariable(projGuid, dpGuid, from, to)</code>
-Returns tags of the particular datapoint.
+**Warning:** Deletes data of one variable based on from-to interval. If from-to is not defined, ALL data are deleted. Use carefully, there is no undo!
-==== getAllProjectDPs====
-<code matlab>getAllProjectDPs(projectGuid)</code>
-Returns project IDs and names that are accessible to logged user.