Javascript guide for DTXr code IDE¶

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

Commands
Events

Commands¶

//Set this to THIS device id.
//The var is used in commands below for convinience.
var gThisDeviceId = 123456;    

/** 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(85343,binaryOutput,0,presentValue,priority_1,active);

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

//Primitive
print(Controller.readProperty(85343/*TOCA DEV PC*/,binaryOutput,0,presentValue));

//Constructed (always JSON format from complex values)
//A priorityArray property is one example of constructed result
print(Controller.readProperty(85343/*TOCA DEV PC*/,binaryOutput,0,priorityArray));

// *** COV Subscribtion ***

//With auto incremented process id, sensitivity (increment) of 1 (analog values) and subscription lifetime of 300s
Controller.COVSubscribe(covProcIncr,85343/*TOCA DEV PC*/,analogInput,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(123,85343/*TOCA DEV PC*/,binaryInput,instance_0,noCovConfirmation,presentValue,null,300 /*lifetime (s)*/);

//UN-Subscribe with specific process id 10
Controller.COVSubscribe(123,85343,binaryInput,instance_0,null,presentValue,defaultIncrement,null);

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

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

//Enable event/alarm reporting on object
Controller.enableIntrinsicReporting(0/*NotificationClass*/,3/*delay*/,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,analogInput,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
alertEnrollmentObjectInstance = 0;
propretaryEventType = 666;
Controller.issueAlert(alertEnrollmentObjectInstance,analogInput,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: job identifier - To paus/cancel the job.
//Arg2: start delay (s) - Time until first exec
//Arg3: period(s) - Time between exec, set to 0 if no repetition is required.
//Arg4: repeates - Number of repeates, null if infinit, 0 if no repeat
//Arg5: code - Any Javascript
Controller.scheduleExecution(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);

// *** 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.¶

/***********************************************************************************************
 * @param {Number} processIdentifier - Event process on the caller side
 * @param {Number} initiatingDevice - The device that send the event
 * @param {Number} object - The source object in readable format 
 * @param {Number} objectType - The source object of the event
 * @param {Number} objectInstance - The instance of source object
 * @param {String} timeStampUTC - Event timestamp in UTC format
 * @param {Number} notificationClass - The NC handling this event on remote node
 * @param {Number} priority - Event priority
 * @param {Number} eventType - The type of event received
 * @param {String} messageText - Readable notification message
 * @param {Number} notifyType - Type of notification [0:Event,1:Alamr,2:AckNotif]
 * @param {Boolean} ackRequired - true if ack is required to clear this event on the remote node
 * @param {String} fromState - The previous state
 * @param {String} toState - The current state after the change
 * @param {Object} eventValues - A map of specific map of values for the particular eventType
 ***********************************************************************************************/
function eventNotificationReceived(processIdentifier,initiatingDevice,object,objectType,objectInstance,timeStampUTC,notificationClass,priority,eventType,messageText,notifyType,ackRequired,fromState,toState,eventValues){
//Use this event to act on notifications that is set to be subscribed by this device.
}