how to determine RX window value's to 1 ?

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  • July 21, 2022 at 9:35 am #32880
    SaSa
    Participant

    hello all,

    how I can change RX window value from 0 to 1 in a downlink message ? I tried different ways as you see in code that I attached here but it doesn’t work

    screen shot :
    https://i.postimg.cc/YSpCTNKB/Inked12.jpg

    downlinks = [];

for (var i = 0; i < msg.payload.length; i++) {
    
    downlink = {};
    var pay = msg.payload[i].System_Activated;
    
    if (pay === null ) {
        //downlink.payload = new Buffer("00", "hex");
    } else {
        downlink.payload = new Buffer( "21"+pay, "hex");
        downlink.eui = msg.payload[i].valve_EUI;
        downlink.port = 2;
        downlink.ack = true;
        downlink.RxWnd = false;

    }
     

  
    downlinks.push(downlink);
}

return [downlinks];
    July 21, 2022 at 10:02 am #32882
    Jason Reiss
    Keymaster

    A downlink can be queued through MQTT, rx_wnd is one of the parameters.

    Instead of RxWnd use rx_wnd?

    July 22, 2022 at 3:18 am #32884
    SaSa
    Participant

    Thanks Jaosn as always. I tested rx_wnd but it didn’t change.

    July 22, 2022 at 7:10 am #32885
    Jason Reiss
    Keymaster

    Does the lora-out node have an rx window setting?

    Otherwise you can use an MQTT out node to connect to localhost:1883 and send downlinks too.

    MQTT Messages

    July 25, 2022 at 8:53 am #32887
    SaSa
    Participant

    Thanks Jason,

    I check the MQTT method explained in the link but I didn’t get really how I should to adapt this node with a function node. Can I ask you please to propose me an alternative way that I could change it in function ?

    July 25, 2022 at 8:57 am #32888
    Jason Reiss
    Keymaster

    May I ask why you need to specify RX1 in the first place?

    July 26, 2022 at 4:20 am #32894
    SaSa
    Participant

    Yes of course. Because in a downlink sent by my function, Rx value is 0 by default (which I try to change) and my valve doesn’t apply command. since when I sent manually exactly the same payload, port, eui, ack but Rx = 1 the valve act exactly what it should.

    • This reply was modified 2 years, 5 months ago by SaSa.
    • This reply was modified 2 years, 5 months ago by SaSa.
    July 26, 2022 at 7:53 am #32897
    Jason Reiss
    Keymaster

    I looked into our custome lora-out node and it does not support the rx window settings.

    In the UI there is LoRaWAN > Network Settings page, see the Network Server Testing section.

    Check Disable Rx2 to use only Rx1.

    Otherwise MQTT or API can be used to set the rx_wnd setting, many articles of how to use MQTT and HTTP APIs are available for node-red.

    Using inspect in a browser when downlink is scheduled this api is called.

    https://10.17.100.141/api/lora/packets/queue
    {“deveui”:”00-80-00-00-00-01-58-34″,”port”:1,”data”:”EjM=”,”ack_retries”:0,”rx_wnd”:1,”ack”:false}

    Hope this helps.

    July 28, 2022 at 8:46 am #32902
    SaSa
    Participant

    thanks Jason, I’ll try to get by with Mqtt method since I know it’s not so easy.

    • This reply was modified 2 years, 5 months ago by SaSa.
    July 29, 2022 at 4:07 am #32905
    SaSa
    Participant

    @jason fortunately I found something which helped me to command the end-device, I’m not at all sure if it’s logic or not but it works literally and by now : `downlinks = [];

    for (var i = 0; i < msg.payload.length; i++) {

    downlink = {};
    var pay = msg.payload[i].System_Activated;
    // let rx_wnd = 1;

    if (pay === null ) {
    //downlink.payload = new Buffer(“00”, “hex”);
    } else {
    downlink.payload = new Buffer( “21”+pay, “hex”);
    downlink.eui = msg.payload[i].valve_EUI;
    downlink.port = 2;
    downlink.ack = true;
    downlink.delay = 1;
    }

    downlinks.push(downlink);
    }

    return [downlinks];`

    I think this line of code downlink.delay = 1; changes RX window value to 1

    • This reply was modified 2 years, 5 months ago by SaSa.
    • This reply was modified 2 years, 5 months ago by SaSa.
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