how to determine RX window value's to 1 ?

[SaSa]

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];

[Jason Reiss]

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

Instead of RxWnd use rx_wnd?

[SaSa]

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

[Jason Reiss]

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.

https://www.multitech.net/developer/software/lora/lora-network-server/mqtt-messages/

[SaSa]

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 ?

[Jason Reiss]

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

[SaSa]

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 1 year, 9 months ago by SaSa.
• This reply was modified 1 year, 9 months ago by SaSa.

[Jason Reiss]

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.

[SaSa]

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

• This reply was modified 1 year, 9 months ago by SaSa.

[SaSa]

@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 1 year, 9 months ago by SaSa.
• This reply was modified 1 year, 9 months ago by SaSa.

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