Javascript guide for DTXr code IDE¶

Shows the various commands and events that can be used to build automation scripts.

Commands
Events

NOTE, the below spec is 100% compatible with version 3.1.7. Ask DAVITOR for compatibility with previous versions or update your device.

Commands¶

    //Set this to THIS device id.
    //The var is used in commands below for convinience.
    var gThisDeviceId = 123456;   
    //Set this to A REMOTE device id on your network.
    //The var is used in commands below for convinience.
    var gRemoteDeviceId = 121212;   

    /** LOG/DEBUG **/

    //Prints to console log window as well as autmation.log
    //Note that automation.js is also written to by various services in DTX by
    //default, not only what you do with print() in your code.
    //Consider this as a volatile log where you debug and then clear from time to time.
    //10Mbyte is max then it will rollover to time-stamped zip file and automation.js is cleared.
    print("hello");

    //Prints to automation_user.log
    //This statement is the only source for loggin in this file.
    //Consider this to be a persistant log of important process matters.
    //10Mbyte is max then it will rollover to time-stamped zip file anf automation-user.js is cleared.
    Controller.printToUserLog("hello user log");

    /** BACnet related **/

    //Translation helper for BACnet object ID->NAME
    //Many even arguments are enumerated where theese function can help
    print(getObjectTypeById(4)); //Binary Output
    print(getPropertyTypeById(85)); //presentValue

    // *** Write a value to an object property ***
    Controller.writeProperty(gThisDeviceId,analogValue,0,presentValue,priority_1,active);
    Controller.writeProperty(gRemoteDeviceId,analogValue,0,presentValue,priority_1,active);

    // *** Read a value from a property. *** 
    //Will return both primitiv and constructed (JSON) values

    //Primitive
    print(Controller.readProperty(gThisDeviceId,analogValue,0,presentValue));
    print(Controller.readProperty(gRemoteDeviceId,analogValue,0,presentValue));

    //Constructed (always JSON format from complex values)
    //A priorityArray property is one example of constructed result
    print(Controller.readProperty(gThisDeviceId,analogValue,0,statusFlags));

    // *** COV Subscribtion ***

    //With auto incremented process id, sensitivity (increment) of 1 (analog values) and subscription lifetime of 300s
    Controller.COVSubscribe(covProcIncr,gRemoteDeviceId,analogValue,instance_0,noCovConfirmation,presentValue,1 /*sensitivity*/,300 /*lifetime (s)*/);

    //With fixed process id 123, sensitivity (increment) no sesnitivity (binary values) and subscription lifetime of 300s
    Controller.COVSubscribe(123,gRemoteDeviceId,analogValue,instance_0,noCovConfirmation,presentValue,null,300 /*lifetime (s)*/);

    //UN-Subscribe with specific process id 10
    Controller.COVSubscribe(123,gRemoteDeviceId,analogValue,instance_0,null,presentValue,defaultIncrement,null);

    // *** Intrinsic Reporting (Alarms and Events) ***

    //Remote Event Subscribe
    Controller.eventSubscribe(gRemoteDeviceId/*device id*/,instance_0/*Notification Class*/);

    //Enable event/alarm reporting on object
    Controller.enableIntrinsicReporting(0/*NotificationClass*/,3/*delay*/,3/*delayNormal*/,analogValue,instance_0,notifyTypeEvent);

    Controller.writeProperty(analogValue,instance_0,presentValue,priority_1,50);
    //TextMessage
    Controller.sendTextMessage(gThisDeviceId,"SOME_TYPE_OF_MSG","hello myself, what's up?");

    //Acknowledge alarm and events
    Controller.acknowledgeAlarm(gThisDeviceId,analogValue,instance_0,processIdZero,
                        ackNormal,1584383651150,"Toca",new Date().getTime());

    //Issue an alert for a specific object via an Alert Enrollment Object
    //The recipients in the notification class connected to the shosen alert enrollment object will receive the alert
    var alertEnrollmentObjectInstance = 0;
    var propretaryEventType = 666;
    Controller.issueAlert(alertEnrollmentObjectInstance,analogValue,0,"To high!",propretaryEventType);     

    Controller.getEnrollmentSummary(gThisDeviceId);

    //Send event notif local or remote nodes
    //DeviceId,NotificationClass,AckRequired,Message
    Controller.sendNotification(gThisDeviceId,0,1,"Coffe anyone?");

    //Get all alarms for a specific device. Return JSON
    resp =  print(Controller.getAlarmSummary(gThisDeviceId));

    //Get all events for a specific device. Return JSON
    resp =  print(Controller.getEventSummary(gThisDeviceId));

    // *** Special Object Types *** //

    //Read a range of datapoints from a TrendLog object
    //The response is JSON with an array of value/timestamp
    Controller.readRange(gThisDeviceId,trendLogMultiple,0);

    // *** HTTP REST and Web Socket ***

    //HTTP GET Request. Returns respons as string
    resp = Controller.HTTP_GET('https://httpbin.org','get','Accept:application/json|Content-Type:application/json','myparam=hello');

    //HTTP POST(also PUT and PATCH) Request. Return response as string
    resp = Controller.HTTP_POST('https://httpbin.org/post'
                ,'Accept:application/json|Content-Type:application/json'
                ,'myparam=hello'
                ,'any payload string data');  

    //Web socket call to any webpage in the project file
    //This require that the page has loaded the Ws.js import.
    //Se HTTP Websocket template from the project tree sub menu
    Controller.sendToWS("mypage","Hello My Page this is a payload"); 

    //Connect to a Web Socket
    //DTX has a built in single web socket client.
    //Connect
    Controller.connectWebSocket("wss://any.websocket.host");
    //Send a message once connection is established
    Controller.sendWebSocketText("Hello");

    // *** SQL relational database access ***

    //Note, SQL db is not embedded so JDBC config is made in settings in advance.
    //Only PostgresSQL is supported for the moment!

    //Simple query. Result (if any) will always be JSON!
    print(Controller.sqlExecuteQuery("select * from anytable"));

    //Inserts and updates are preferably solved with functions or procedures on
    //the databas side. The CALL statement can then be utilized:
    Controller.sqlExecuteQuery("CALL upsert_anytable("+name+",'"+age+"')");

    //But of course a simple insert can also be sent...
    print(Controller.sqlExecuteQuery("insert into anytable values('kalle','13')"));

    // *** Timers and Schedulers ***

    //Show all current jobs (including system jobs)
    Controller.schedulerSummary();

    //Pause all jobs
    Controller.pauseAllJobs();

    //Pause a specific job
    Controller.pauseJob("JobA");

    //Resume all jobs
    Controller.resumeAllJobs();

    //Resume a specific job
    Controller.resumeJob("JobA");

    //Start job
    //Eg. executes function myCallbackFunction() with argument "df" after 10 seconds
    Controller.startJob('Job1',10,'myCallbackFunction("df")');
    //Eg. executes function myCallbackFunction() repeatedly every minute
    //with a start delay of 5 seconds
    Controller.startJob('Job2',5,60,'myCallbackFunction');

    //Eg. start a CRON job that executes myCallbackFunction
    //at 00:10 AM (10 minute past midnight) every day
    Controller.startCronJob("Job3",'0 10 0 ? * * *','myCallbackFunction');
    //Note: CRON can be difficult to construct. 
    //Use the below link to both crete and also verify your CRON strings.
    //https://www.freeformatter.com/cron-expression-generator-quartz.html

    //Cancel a job by using the name provided above
    Controller.cancelJob("Job3");

    //Cancel all jobs
    Controller.cancelAllJobs();        

    //Cancel a specific jobs
    Controller.cancelJob("JobG");        

    //This is a special function where you can schedule the execution of
    //a code snippet.
    //Arg1: Som job identifier - To use when pause/cancel the job if neccesary.
    //Arg2: start delay (s) - Time until first exec
    //Arg3: period(s) - Time between exec, set to 0 if no repetition is required/wanted.
    //Arg4: repeates - Number of repeates, null if infinit, 0 if no repeat
    //Arg5: code - Any Javascript
    Controller.scheduleExecution("wait05",5,0,0,"print('print once in 5 sec');");

    // *** MISC ***

    //Send an email. Note, needs smtp-server config first
    Controller.SendEmail("torbjorn.carlqvist@davitor.com","anysubject","some body");

    // *** Embedded JSON storage ***

    //Perfect to use when automation settings, states, structures etc must be persisted and
    //the use of an external SQL database is unnecessary

    //Push a string to spcified queue (queue will be created if not exist)
    //This queue is persistant during reboot of the evice
    //All queues and records are stored in the collection "jsonstore.json" which can be found in project folder
    Controller.JSONPush("toca","msg5");
    //Pop a string from the specified queue. FIFO!
    //Returns null if no strings found
    print(Controller.JSONPop("toca"));

    print(Controller.JSONPersist("nisse"));
    print(Controller.JSONPersist("1588058754445","palle"));

    print(Controller.JSONRestore("1588058754445"));

    print(Controller.JSONBrowse("toca"));

    //Change name on multiple local objects
    //This can be used when a group of objects need to have save name prefix.
    //eg. when a sensor has multiple object and you want them to share same sensor name.
    Controller.updateLocalObjectNames("TestBI","newname");

    //This method should be used when javascript forms a link between
    //an external interaface and the object stack.
    //Typically when a button on a HMI should update an binaryInput or
    //a reception of a BLE Beacon should update an analogInput.
    //This method will create an object if no object exists with same profilName property
    Controller.createOrUpdateLocalObject(analogInput,null,"MyObjectName",123);

    //As an addition use this function to control the reliability of the obejct in real time.
    //This will create events and alarms accordingly of intrinsic reporting is enanbled.
    Controller.setLocalObjectReliability(binaryOutput,0,'shorted-loop');
    Controller.setLocalObjectReliability(binaryOutput,0,'no-fault-detected');

    //Yet another addition is this function to set the overridden flag on local objects.
    //The meaning of this flag is to tell BACnet that this physical point is not 
    //longer reliable or commandable.
    Controller.setLocalObjectOverridden(binaryOutput,0,true);
    Controller.setLocalObjectOverridden(binaryOutput,0,false);

    // *** File access ***/

    //Basic file R/W/List for files in project folder (and sub folders)
    Controller.writeFile("file_rw_test.txt","Hello file handling!");
    print(Controller.readFile("file_rw_test.txt"));
    print(Controller.listFiles(".txt",null));
    print(Controller.listFiles(".json","mysubfolder"));    
    print(Controller.removeFiles(".txt",null));    

    // *** OS operations ***/

    //Run commands on host operatice system
    //Result is JSON string
    //The exit_code tells if successful or not.
    //There is a built in timeout if you accedently start a job that does not 
    //stop of it's own. Like doing unlimited ping on Linux
    //No, there is no way to stop a command with Ctrl-C from JS.
    //Note, the process is running in foreground so if DTX dies the process dies too.
    print(Controller.execCommand("ping -n 3 google.com"));

    // *** Serial Ports ***/

    //List all connected serial ports. The response is JSON and can tell a lot
    //about the serial port. For example in which USB socket it is connected.
    print(Controller.listSerialPorts());

    //Connect to a serial port (multiple connection is allowed)
    //Use the serial port name from the response from listSerialPorts() above.
    //As argument form a JSON according to specification.
    //Example of setting up a serial connection to ttyACM0 that handles 
    //delimited responses with a "Return(0d)" at the END with a speed of 115200baud
    //Note that if a connection already occurs in this name it will be closed automatically
    Controller.setupSerialPort("ttyACM0",'{"msgDelim":true,"baudrate":115200,"delimPattern":"0d","delimPosition":"end"}');

    //Send ASCII data to the connected port
    Controller.writeSerialAscii("ttyACM0","hello");

    //Send HEX data to the serial port
    Controller.writeSerialHex("ttyACM0","03"); //Eg. Ctrl-C in HEX

    //Close serial port
    Controller.closeSerialPort("ttyACM0");

    //NOTE: all received serial data enters the event callback "onSerialReceive" 

    /*** MODBUS ***/

    /* Modbus TCP */

    //If needed, use this to simulate a slave on THIS device for test purpose. 
    //Will setup a demo image of regs and coils
    Controller.modbusTCPCreateSlave();

    //Read coils (true/false)
    //Args: Slave IP, Slave Port, Start Addr, Count
    //Return: JSON Array with result
    print(Controller.modbusTCPReadCoils("localhost",502,1,1));

    //Reading input discretes (true/false)
    //Args: Slave IP, Slave Port, Start Addr, Count
    //Return: JSON Array with result
    print(Controller.modbusTCPReadInputDiscretes("localhost",502,1,5));

    //Reading input registers (Analog Inputs)
    //Can be either signed or unsigned 16-bit values.
    //Args: Slave IP, Slave Port, Start Addr, Count
    //Return: JSON Array with result
    print(Controller.modbusTCPReadInputRegisters("localhost",502,1,5));

    //Reading holding registers (Analog Outputs)
    //Can be either signed or unsigned 16-bit values.
    //Args: Slave IP, Slave Port, Start Addr, Count
    //Return: JSON Array with result
    print(Controller.modbusTCPReadHoldingRegisters("localhost",502,1,5));

    //Write to coil (!CAUTION!)
    //Note, always returns null
    //Args: Slave IP, Slave Port, Addr, Status (true=On/1, false=Off/0)
    Controller.modbusTCPWriteCoil("localhost",502,1,false);

    /* Modbus Serial */
    //Note, setting null as port settings defaults to 9600/8N1

    //A mock-up test slave for serial modbus
    //Args: Port, Port Settings, RTU
    Controller.modbusSerialCreateSlave("COM1",null,false);
    //Writing to a MODBUS slave coil via Serial RTU
    //Args: Port, Port Settings,RTU,reg address, value/state 
    Controller.modbusSerialWriteCoil("COM2",null,false,2,true);
    //Reading from a MODBUS slave coil via Serial RTU
    //Args: Port, Port Settings,RTU,reg address
    Controller.modbusSerialReadCoils("COM2",null,false,1,2);

    /*** Controller management ***/

    //Running reInit() will completly clear the JS-engine, stop all jobs and
    //re-actiavate the code and finally call the init() method.
    Controller.reInit();

Events¶

eventNotificationReceived - Called when an intrinsic report notification is received.¶

/**
 * Called when controller starts. Good place to do init stuff
 */
function init(){
    print("init!");

}

/***********************************************************************************************
 * Called when the controller receives a notification (intrinsic reporting) from this or another device
 * @param {processIdentifier} Can be used to process events/alarms different consumed. Users choice.
 * @param {Number} initiatingDevice - The device ID that send the event and the device where the triggered object belongs
 * @param {String} object - A convinient string to describe objectype:instance in text
 * @param {Number} objectType - The source object of the event
 * @param {Number} objectInstance - The instance of source object
 * @param {Number} timeStampUTC - EPOC type of timestamp where the event/alarm trigger fired
 * @param {Number} notificationClassInstance - An instance pointer to the connected class
 * @param {Number} priority - Priority of this event
 * @param {Number} eventType - The type of event received. Eg. 'outOfRange'
 * @param {String} messageText - Free text that can be used describing the event
 * @param {String} notifyType - Type of notification. Can be 'alarm' or 'event'
 * @param {Boolean} ackRequired - Tell wether this event/alarm needs acknowledgment or not
 * @param {String} fromState - The previous state
 * @param {String} toState - The current state after the change
 * @param {Object} eventValuesStr - A JSON object of specific values for this particular eventType 
 ***********************************************************************************************/
function eventNotificationReceived(processIdentifier,initiatingDevice,object,objectType,objectInstance,timeStampUTC,notificationClassInstance,priority,eventType,messageText,notifyType,ackRequired,fromState,toState,eventValuesStr){

    var eventDeviceName = Controller.readProperty(initiatingDevice,device,initiatingDevice,objectName);
    var ncObjectName = Controller.readProperty(initiatingDevice,ObjectType.notificationClass,notificationClassInstance,objectName);
    var eventObjectName = Controller.readProperty(initiatingDevice,objectType,objectInstance,objectName);

    var summary = "Received " +eventType+" "+notifyType+" from "+eventDeviceName+" for object "+eventObjectName+" at "+new Date(timeStampUTC).toTimeString();

    print(summary);

    print("Current state:");
    try{
        var eventValues = JSON.parse(eventValuesStr);

        for (var key in eventValues) {
            if (eventValues.hasOwnProperty(key)) {

                print(" - "+key + " " + eventValues[key]);

                /*** Tip, enter code here to act on a specific key/value ***/

            }
        }

    }catch(e){
        print("eventValuesStr not JSON!")
    }

    if (notifyType === 'ackNotification' ){
        var ackedstate = " - Acked state "+toState;
        print(ackedstate);
        summary = summary + ackedstate;
    }else{
        var transistion = " - State changed from "+fromState+" to "+toState;
        print(transistion);
        summary = summary + transistion;
    }

    print(" - Priority "+priority);
    print(" - Ack required "+ackRequired);
    if ( messageText !== undefined && messageText !== "")
        print(" - Message "+messageText);
    print(" - Class "+ncObjectName)

    //Due to the standard, a notifying device does not save un-acked notifs
    //transitions during reboot so it is best practise to make persistant on
    //the receiver side.
    Controller.printToUserLog(summary);

}

/*******************************************************************************
 * Called when Change Of value Notification received from remote device
 * In order to receive Change Of value notification the remote device must first
 * be subscribed on the particular object instance. 
 * Eg. subscribe to Analog Input 0 on device 403
 * - Controller.remoteCOVSubscribe(403,0,0); 
 * It is also possible to subscribe on local objects and in case of a local 
 * notification the device argument is null.
 * Eg. subscribe on local Binary Value 1 and no increment (null)
 * - Controller.COVSubscribe(0,0,null); 
 * @param {Number} epoch - A timestamp (nb of sec since 1970 kind of timestamp.
 * @param {Number} processId - COV process id used by the requester in this subscription
 * @param {Number} deviceId - Remote device that sent the notification
 * @param {Number} objectType - The source object of the event
 * @param {Number} objectInstance - The instance of source object
 * @param {Number} propertyId - The instance of source object* 
 * @param {String} value - The new value.
 *******************************************************************************/
function covNotificationReceived(epoch,processId,deviceId,objectType,objectInstance,propertyId,value){
    print("covNotificationReceived - "+ "Process: " + processId +  " Device: " + deviceId + " ObjectType: " +
                objectType+" ObjectInstance: " + objectInstance + " propertyId: " + propertyId +
                " New Value: " + value + " Time: " + new Date(epoch*1000));

}

/**********************************************************
 * Called when the controller receives a HTTP GET request
 * @param {String} resource - The REST resource
 * @param {Object} params - The HTTP url parameters 
 *********************************************************/
function HTTP_GET(resource,params){
    print(new Date().toISOString() + " HTTP GET - Resource: " + resource + " Params:" + params);
}

/**********************************************************
 * Called when the controller receives a HTTP POST request
 * @param {String} resource - The complete URI in the request
 * @param {Object} payload - The HTTP header parameters
 *********************************************************/
function HTTP_POST(resource,payload){
    print("HTTP POST - Resource:" + resource + " Payload:" + payload);
}

/****************************************************************
 * Called when a Web Socket request is made from a Web Client.
 * 
 * @param {String} context - The key of the page
 * 
 * The context can be made up by three parts URI + APP + SESSION
 * where URI is the only mandatory part.
 *                           
 * @param {String} payloadTxt - The data sent from the WS-client
 *****************************************************************/
function receiveFromWs(context,payloadTxt){
    print("WS Callback from context "+context +" payload:\n" + payloadTxt);

    /** This is a snippet to listen on Web Page Demo Template **/
    /** Use it or remove it                                   **/
    if ( context.indexOf("page-demo") > 0 ) {

        try{
            var jsonObjPayload = JSON.parse(payloadTxt);
            print(jsonObjPayload.msg);
            print(jsonObjPayload.action);

            //Answer to web page using incoming context
            Controller.sendToWS(context,"Oh, Hi! I am a Web Socket request. Look for me in automation.js"); 

        }
        catch(e){
            print("Err"+e);
        }

    }
}

/**
 * Called when a BACnet object on this device changed.
 * @param {type} objectType
 * @param {type} objectInstance
 * @param {type} propertyId
 * @param {type} oldValue
 * @param {type} newValue
 * @returns {undefined}
 */
function localPropertyChanged(objectType,objectInstance,propertyId,oldValue,newValue){
    //print('property changed on '+objectType+':'+objectInstance+' for prop '+propertyId +' where old value is '+oldValue +' and new value is '+newValue);
}

/**************************************************************************************************
 * Callback when this controller receives a I Am notification from a remote device on the network
 * @param {Number} device - Remote device that says hello
 * @param {String} mac - The BACnet mac address of the sending device
 **************************************************************************************************/
function iAmReceived(device,mac){
    //print("IAM received from device:" + device + " MAC:"+mac);
}

/**************************************************************************************************
 * Callback when this controller receives a BACnet private message request
 * @param {Number} sourceDeviceId - Remote device that speeks
 * @param {String} messageClass - See BACnet standard for usage. Could be use as any string data
 * @param {String} messagePriority - See BACnet standard for usage. Could be use as any string data
 * @param {String} message - Send message data
 **************************************************************************************************/
function textMessageReceived(sourceDeviceId,messageClass,messagePriority,message){
    print("textMessageReceived:"+message);
}

/***********************************************************************************************
 * Called when the controller receives a write request from from a remote client
 * on one of the local objects.
 * @param {Number} objectType - The type of the object that is requested to be written
 * @param {Number} objectInstance - The instance of the object that is requested to be written
 * @param {Number} property - The property id that requested to be written
 * @param {Number} priority - The priority of the value that is requested to be written
 * @param {String} value - The new value
 ***********************************************************************************************/
function propertyWritten(objectType,objectInstance,property,priority,value){
    print("propertyWritten - ObjectType: "+objectType+" ObjectInstance: "+ objectInstance + " Property: "+ property + " Priority: "+ priority + " Value: "+value);
}

/***********************************************************************************************
 * Called when a file is put in file input directory
 * The file input directory path is configured in setting page and is by default empty
 * 
 * @param {String} fileName - The name of the file put in the file input directory
 * @param {String} fileContent - The content of the file
 * 
 * Note: There is special mapping for CSV file which are converted to JSON!
 *       Other file types are just received as is
 ***********************************************************************************************/   
function receivedFile(fileName,fileContent){
    print("Received file "+fileName+ " with content "+ fileContent);
}   

/***********************************************************************************************
 * Called receiving data on an activated serial port
 * 
 * Note, see Controller.setupSerialPort(..) for activate a serial port
 * 
 * @param {String} port - Wich port the data comes from
 * @param {String} payload - The data
 * 
 ***********************************************************************************************/   
function onSerialReceive(port, payload){

    print("Serial data received on port: "+port+" data: "+payload); 
}

/**************************************************************************
 * This callback catches unexpected runtime errors like timeouts when 
 * writing or subscribing to a remote device currently absent.
 * @param {String} type - Type or source of exception
 * @param {String} message - Short description of the issue in plain text
 * @param {String} details - Optional information in JSON format
 **************************************************************************/
function exceptionCatch(type,message,details){
    print("Exception catched, type:"+type+" message:" + message + " details:" + details );
}

/**
 * When supported by the platform and enabled in the setting "beacon Station under Bluetooth" 
 * this method is invoked with advertisment from all Bluetooth LE devices nerby
 * 
 * @param {String} mac - The sending Bluetooth device MAC adress
 * @param {String} rssi - The signal strengh of the sending beacon
 * @param {String} bt_payload - The beacon data
 */
function onBTBeaconAdvertising(mac,rssi,bt_payload){

    //Example of whitelist filter
    if( mac.includes("38FE") || mac.includes("CD8E")){

        print("Beacon adv from mac: "+ mac + " rssi: "+rssi+" data:"+bt_payload);

        //Here you can parse the payload from the beacon as you wish
        //If the beacon is a Ruuvi, DTXr has a built in javascript library for the format 5
        //See documentation on DTXr wiki
        //https://collab.davitor.com/redmine/projects/dtxr/wiki
        //More info on Ruuvi format and how to parse here
        //https://ruuvi.com/custom-ruuvi-data-format-in-a-day/

    }
}

/**
 * Received an MQTT publish request
 * @param {type} topic
 * @param {type} payload
 */
function MQTTOnPublish(topic,payload){
    print("MQTT client published " + payload + " on topic " + topic);
}

/**
 * Received a web socket client text response
 * @param {type} text
 */
function WebsocketOnClientReceiveText(text){
    print("WebsocketOnClientReceiveText: "+text);
}