delete from events

In Mango's SQL console to flush the events table.
Also, this thread is 💯. Great work all.

thnx for the pointers.

I am not sure what you're refering to as 'clear dates' so I may not have understood exactly correct. Events on the events page (/events.shtm) get 'Acknowledged' to clear them from a user's view in the header. Actual deleting is handled by the purge settings in the system settings page, under "Purge settings"

"How to purge all Information on "Urgent events" or "information " . seems there is no option/knob when viewing the list. ( clear dates , seem to do nothing when selected periode )

Created : tcp/ip source ( 2 sec update period )
Created : Data Point to that :

     "loggingType":"NONE",
     "dataType":"ALPHANUMERIC",
     "queryable":true,
      "readCommand":"<your_hex_request_for_your_device>",
      "settable":false,
      "valueIndex":0,
      "valueRegex":".*",

Created META-source
Created : Data Point to that :

     "name":"DoorAlarm",
     "enabled":true,
     "dataType":"ALPHANUMERIC",
     "updateContext":true,
     "varName":"p110"

added in script field :

// get Hex from source

// Alarm relays Bit ( 1 is Alarm )
var DoorAlarm = /[0-9A-Fa-f]{185}([0-9A-Fa-f]{1}).*/.exec(p110.value); 
var extractedValue = DoorAlarm[1];

// payload
return "DoorAlarm- " + DoorAlarm[1];

...

So i added some other "Meta-data points" for other values.
This works ok, and i can understand how it works.

Now the first approach has probably benefits in setting up many same kind devices/values i guess , so i am focusing on that as well , as i would like to understand how that should work.

Script "message Queue"

// get Hex from source

var busVoltage = /[0-9A-Fa-f]{30}([0-9A-Fa-f]{16}).*/.exec(source.value); 
var extractedValue = busVoltage[1];

var PsuLoad = /[0-9A-Fa-f]{78}([0-9A-Fa-f]{16}).*/.exec(source.value); 
var extractedValue = PsuLoad[1];

// Alarm relays Bit ( 1 is Alarm )
var Alarm = /[0-9A-Fa-f]{185}([0-9A-Fa-f]{1}).*/.exec(source.value); 
var extractedValue = Alarm[1];

// door alarm Bit (1 is Door open )
var DoorAlarm = /[0-9A-Fa-f]{185}([0-9A-Fa-f]{1}).*/.exec(source.value); 
var extractedValue = DoorAlarm[1];


var message = busVoltage[1];

function toASCII(message) {
  var result = "";
  while(message.length > 1) { //parse two characters at a time
     var charCode = message.substr(0, 2);
     result += String.fromCharCode( "0x" + charCode );
     message = message.substr(2); 
  }
  return result;
}

// swap bytes /hex

function swap32(val) {
return ((val & 0xFF) << 24)
       | ((val & 0xFF00) << 8)
       | ((val >> 8) & 0xFF00)
       | ((val >> 24) & 0xFF);
}

//print (message);


function hex2float(num) {
    var sign = (num & 0x80000000) ? -1 : 1;
    var exponent = ((num >> 23) & 0xff) - 127;
    var mantissa = 1 + ((num & 0x7fffff) / 0x7fffff);
    return sign * mantissa * Math.pow(2, exponent);
}


function roundToTwo(num) {    
    return +(Math.round(num + "e+2")  + "e-2");
}


// covert Hex to String
var subresult = (toASCII(message));
// create human readabe number
var result = (roundToTwo(hex2float("0x" +subresult)));

// send payload
return target.value + "MainAlarm-" + Alarm[1] + ";" + "Door-" + DoorAlarm[1] + ";" + "busvolt-" + result + ";" ;

at this point i get as result : MainAlarm-0;Door-0;busvolt-53.68;

thats correct.

so i have right input , further i am still completely lost in how i should proceed.

i added my other (modbus) device and thats straight forward , enter the source and add data points to it. thats easy.
now why cant i see the logic for the other source..

i ques this is normal ?

return target.value + result + ";" ;

to

return target.value + "busvolt-" + result + ";" ;

But I think you will want to support multiple data extractions from the same message, like,

return target.value + "busvolt-" + result + ";otherMeasuredValue-" + result2 ;

Also, you may have to have call parseFloat, like so:

identifierMap[ messageInfo[0] ].set( parseFloat( messageInfo[1] ));

and point link details :

49.73;49.73;49.73;

The identifier would be useful if you have multiple values to get out of a message. You explicitly know their positions when you extract the values, so you can give them something you can identify them with. So instead your message queue may look like,

busVoltage-49.73;busVoltage-49.73;busVoltage-49.73;otherValue-106.2;yetAnotherValue-78.1;

such that you could identify where to set those values out to in the script.

var ident = "messageIdentifier";
identifierMap[ ident ].set( /*your value here*/ );

Where context points are added to the script through the UI of the Scripting data source.

Can someone point me some explanation links about :

var identifierMap = { "messageIdentifier" : contextPoint1 ....  } 

cant find much on " indentifierMap " on internet somehow.

Identifier is just a name that you can use in both places. Object is a JavaScript term for things defined as { "key": value }. Other names are Map and Dictionary.

{ "identifier1" : p334, .....}

Where p334 is the variable name for the context point of the script.

and what to put in :

the script - source script. ?

i tried 1000 different combinations. and reading the wiki / manuals. but sorry, i don't
get it...

i found that i need to convert in javascript the with sort of

function hex2float(num) {
var sign = (num & 0x80000000) ? -1 : 1;
var exponent = ((num >> 23) & 0xff) - 127;
var mantissa = 1 + ((num & 0x7fffff) / 0x7fffff);
return sign * mantissa * Math.pow(2, exponent);
}



window.alert (hex2float("0xA4703942"));
//flipped does the trick
window.alert (hex2float("0x423970A4"));
// outcome 46,36..... ( not rounded )

``

so little progress here.

All the scripts use JavaScript.