Node-Red v0.15.3???

[bdbuysse@gmail.com]

Are there plans to upgrade node-red on conduit gateways to a more recent version? I love that your gateways come equipped with node-red as it affords a simple way to get exposed to the LoRa stack, but was saddened when I recently purchased a MTCAP-915-041A-ND gateway and found out it is still using v0.15.3. The Node-Red community still lists Multitech as a sponsor, but it seems your gateways are stuck on a 2016 release.

[Jason Reiss]

This has been discussed many times before.
The hardware does not support hw floating point operations, sw floating point was last supported in node.js in the installed version v0.10.48, node-red v0.15.3 is the last version available.

Node-red upgrade

An updated gateway will be available this year.

[SaSa]

Hello Jason,

To be honest i saw your answer which is for 21 jan 2020, and I wanted to ask you pls if any upgrade has released till today for node-red ?

thanks in advance,

[Jason Reiss]

Sabri,

The current hardware still does not support hw float point operations required for newer versions of node-red.

We are working on updated hardware platforms that should be available later this year.

[SaSa]

hello Jason,

hope you are doing great,

In fact I got a question, I’m running a code to aim to recive data from an API and to sort them.

The probleme is that I can see the resulte of this function in node-red v.2.2.2 but not in 0.15.3 ?

var data = [];
for (var i = 0; i < msg.payload.length; i++) {
var Pay = msg.payload[i].System_Activated;
let Dev_eui = msg.payload[i].valve_EUI;

if (msg.payload === null) {
data.push({ payload: “Don’t action”, Dev_eui: Dev_eui, port : “1”, ack: “1” });
} else {
data.push({ payload: Pay, Dev_eui: Dev_eui, port : “1”, ack: “1” });
}
}
data = JSON.stringify(data);
console.log (msg.data);
return {data}`

[SaSa]

I have another probleme also, when I send a payload to an end-device, but it add something that doesn’t existe in patload.

could you please help me ?

using this code :

msg.eui = "XXXXXXXXXXXXX";
msg.payload = "31";
port = "1" ;
ack = "1";
return msg;

[Jason Reiss]

msg.payload = "31";

This will send two bytes, 3 and 1 in ascii as 0x33 and 0x31 shown below.
The downlink format is [TYPE][DEVADDR][FCNT][PORT][PAYLOAD]

at+send hello
018856a20005000000013331

OK

End of packet is
Port: 01 Payload: 3331

To send only one byte.
msg.payload = new Buffer("31", "hex");

at+send hello
018856a2000a0000000131

OK

End of packet is
Port: 01 Payload: 31

Port is an int and ack is a bool.

msg.port = 1 ;
msg.ack = true;

[Jason Reiss]

For your original JS code

How is System_Activated and value_EUI added to a payload?
This would not come out of the network server on Conduit.

var Pay = msg.payload[i].System_Activated;
let Dev_eui = msg.payload[i].valve_EUI;

Not sure why you create an array for data and push packets into it.
Only one downlink should be created. “eui” instead of “Dev_eui” as your second example should be used.

This doesn’t look right.
data.push({ payload: Pay, Dev_eui: Dev_eui, port : “1″, ack: “1″ });

Let me know if you have more questions, seems like you are making progress in the right direction?

[SaSa]

Thanks Jason,
so with your help I could resolve the problem of payload and it sends correctly now.

For the second part, we have some data which arrive from our database using a API request. the aim of this function is just to sort and analyse theses data and redirect them to our End-devices.

data format:

[{"ID":10132,"Humidity":53,"Date_Interpreted":"2022-07-12T04:38:42.000Z","System_Activated":null,,,"valve_EUI":"XX-XX-XX-XX-XX-XX-XX-XX"},{"ID":1970,"Humidity":61,"Date_Interpreted":"2022-06-23T09:01:33.000Z","System_Activated":null,"valve_EUI":"XX-XX-XX-XX-XX-XX-XX-XX"}]

By using this function, we want just to send "system_activated" as "payload" to an end-device with eui : "valve-eui" in a message containing "port = 1", and "ack: true"

Thanks in advance for your help.

[Jason Reiss]

Reviewing functionality of Node-red and returning an array should result in each message in the array being passed to the next node.
https://nodered.org/docs/user-guide/writing-functions

This code should queue a single byte to the node based on the System_Activated field. You can change the value as needed.

downlinks = [];

for (var i = 0; i < msg.payload.length; i++) {
    
    downlink = {};
    downlink.eui = msg.payload[i].valve_EUI;

    if (msg.payload[i].System_Activated) {
        downlink.payload = new Buffer("01", "hex");
    } else {
        downlink.payload = new Buffer("00", "hex");
    }

    downlink.port = 1;
    downlink.ack = true;
    downlinks.push(downlink);
}

return downlinks;

[SaSa]

thanks Jason,

the code that you sent me works but doesn’t result what I want exactly, It applies just for the first array.

thanks in advance.

[Jason Reiss]

I am not sure exactly what you are meaning to do. Hopefully there is enough example code for you to play with and get to work for your use case?

[SaSa]

ok, I’ll try to better explain you my issue,

first of all this is exactly the format of data that I receive from my database using http request :

[{"ID_Inter":1980,"lumiere":62,"Date_Inter":"2022-06-23T09:31:33.000Z","System_Activated":null,"valve_EUI":"xx-xx-xx-xx-xx-xx-xx-xx"},
{"ID_Inter":1981,"lumiere":62,"Date_Inter":"2022-06-23T09:34:33.000Z","System_Activated":null,"valve_EUI":"xx-xx-xx-xx-xx-xx-xx-xx"},
{"ID_Inter":1982,"lumiere":62,"Date_Inter":"2022-06-23T09:37:33.000Z","System_Activated":10,,"valve_EUI":"xx-xx-xx-xx-xx-xx-xx-xx"}]

Using the code that you sent me, I mean this :

downlinks = [];

for (var i = 0; i < msg.payload.length; i++) {
    
    downlink = {};
    downlink.eui = msg.payload[i].valve_EUI;

    if (msg.payload[i].System_Activated) {
        downlink.payload = new Buffer("01", "hex");
    } else {
        downlink.payload = new Buffer("00", "hex");
    }

    downlink.port = 1;
    downlink.ack = true;
    downlinks.push(downlink);
}

return downlinks;

In result, I see just a downlink sent to the first eui where ID_Inter”:1980. since it should be sent to all devices.

could you help me please to solve this problem, I can’t really understand the logic of this version of node-red.

thanks in advance.

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

[SaSa]

so I found the problem and I’ll share it here in case. so easily instead return downlinks,I put return [downlinks]. this lets me to sort them in diferentes messages.

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

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