Hello,

I am trying to do something that I would think would be easy if I had any clue to what I was doing.

I want to take the variable COM ACTIVE FREQ TYPE:1, String and change the out put based on the value of the variable.

"ATIS" - ATIS
"UNI" - UNICOM
"CTAF" - CTAF
"GND" - GROUND
"TWR" - TOWER
"CLR" - CLEARANCE DELIVERY
"APPR" - APPROAACH
"DEP" - DEPARTURE
"FSS" - FSS
"AWS" - AWOS

I know it's a very minor issue but I am really trying to learn how to use RPN and I thought this would be a simple project.  Here is the latest version of my RPN script:

(A:COM ACTIVE FREQ TYPE:1, String) 'ATIS' scmp 0 == if{ 'ATIS' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'UNI' scmp 0 == if{ 'UNICOM' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'CTAF' scmp 0 == if{ 'CTAF' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'GND' scmp 0 == if{ 'GROUND' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'TWR' scmp 0 == if{ 'TOWER' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'CLR' scmp 0 == if{ 'CLEARANCE DELIVERY' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'APPR' scmp 0 == if{ 'APPROACH' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'DEP' scmp 0 == if{ 'DEPARTURE' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'FSS' scmp 0 == if{ 'FSS' } els{ (A:COM ACTIVE FREQ TYPE:1, String) 'AWS' scmp 0 == if{ 'AWOS' } els{ 'NONE' } } } } } } } } } } }

In the streamdeck the RPN is all on one line and the variable type is S:.

Depending on how I edit the RPN (read make a bigger mess) the button will either be completely blank of more likely it just stays at the same value on the SD button.  The variable is updating in AAO and in SpadNext so I know it is my sub par attempt at RPN.

Can someone point out where I am going wrong?

Thank you,

Joe 

13 hours ago, IrwinMFletcher said:

Can someone point out where I am going wrong?

I don't know about "wrong" (except you are testing scmp backwards 0 = false)- I would just display the value of the AVar...

If I wanted those strings, my solution would be completely different. I would not use S: . Instead, I'd create an Autoscript (Aircraft or even Global) that only runs every second, and that writes the desired string into an LVar - which I then display on the StreamDeck. Thaat way I can test the script properly in the RPN editor and the load on the WebAPI is greatly reduced (the S: code would be sent at least 10 times each secound - I doubt that you need that kind of accuracy for this use case)

My script would look like this, using registers and trusting the stack processing of RPN

(A:COM·ACTIVE·FREQ·TYPE:1,·String)·ss0·
'NONE'·
sl0·'ATIS'·scmp·1·==·if{·'ATIS'·}·
sl0·'UNI'·scmp·1·==·if{·'UNICOM'·}·
sl0·'CTAF'·scmp·1·==·if{·'CTAF'·}·
sl0·'GND'·scmp·1·==·if{·'GROUND'·}·
sl0·'TWR'·scmp·1·==·if{·'TOWER'·}·
sl0·'CLR'·scmp·1·==·if{·'CLEARANCE·DELIVERY'·}·
sl0·'APPR'·scmp·1·==·if{·'APPROAACH'·}·
sl0·'DEP'·scmp·1·==·if{·'DEPARTURE'·}·
sl0·'FSS'·scmp·1·==·if{·'FSS'·}·
sl0·'AWS'·scmp·1·==·if{·'AWOS'·}·
(>L:MyFreqStr,·String)

In more complex use cases and added clarity, I would even resort to JScript or Javascript (same code, different header)

JScript (easier on performance):

(WSH:jscript|AaoEntry)

function AaoEntry(){
    var check = (A:COM ACTIVE FREQ TYPE:1, String);
    var result;
    switch(check){
        case 'ATIS': result = 'ATIS'; break;
        case 'UNI': result = 'UNICOM'; break;
        case 'CTAF': result = 'CTAF'; break;
        case 'GND': result = 'GROUND'; break;
        case 'TWR': result = 'TOWER'; break;
        case 'CLR': result = 'CLEARANCE DELIVERY'; break;
        case 'APPR': result = 'APPROAACH'; break;
        case 'DEP': result = 'DEPARTURE'; break;
        case 'FSS': result = 'FSS'; break;
        case 'AWS': result = 'AWOS'; break;
        default: result = 'NONE'; break;
    }
    (L:MyFreqStrJs, String) = result;
}

Javascript:

(WSH:javascript|AaoEntry)

function AaoEntry(){
    var check = (A:COM ACTIVE FREQ TYPE:1, String);
    var result;
    switch(check){
        case 'ATIS': result = 'ATIS'; break;
        case 'UNI': result = 'UNICOM'; break;
        case 'CTAF': result = 'CTAF'; break;
        case 'GND': result = 'GROUND'; break;
        case 'TWR': result = 'TOWER'; break;
        case 'CLR': result = 'CLEARANCE DELIVERY'; break;
        case 'APPR': result = 'APPROAACH'; break;
        case 'DEP': result = 'DEPARTURE'; break;
        case 'FSS': result = 'FSS'; break;
        case 'AWS': result = 'AWOS'; break;
        default: result = 'NONE'; break;
    }
    (L:MyFreqStrJs, String) = result;
}

 

Edited March 6, 20251 yr by Lorby_SI

Wow!  Thank you for your amazing and detailed help, I greatly appreciate it!