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Injecting many payloads at once (node-red)

Node-red - writing conditional functionConcurrent access to msg/payload on split flows in node-red?Get value from msg.payload return from a mysql query Node-REDNode-Red: Parsing JSON data and converting it into binary.update a file in node-red through context-storageNode Red Wemo Lookup JSON parsing error msg.payload : undefinedGetting individual data from node-red Object?Error “TypeError: Cannot read property 'ODP' of undefined” on node-rednode-red Schedex nodeNode-Red Function Wait for 2 Inputs

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

I have a problem. I'm new to node red, I want to inject many payloads with different topics at once. I wanted to do it with function like in first node. It's function looks like so:

msg.topic="ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String"
msg.payload=global.get("nazwa")
return msg
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String"
msg.payload=global.get("nazwa2")
return msg
...
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String"
msg.payload=global.get("nazwa9")
return msg

However it doesn't work. The 2nd node is working but in total I would have like 150+ blocks connected to OPC UA Client block. So my question is: does anyone know if there's a way to inject multiple payloads with different topics, favorabily with function, instead of doing it one by one with inject blocks?

node.js node-red

share|improve this question

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

add a comment | 

0

I have a problem. I'm new to node red, I want to inject many payloads with different topics at once. I wanted to do it with function like in first node. It's function looks like so:

msg.topic="ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String"
msg.payload=global.get("nazwa")
return msg
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String"
msg.payload=global.get("nazwa2")
return msg
...
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String"
msg.payload=global.get("nazwa9")
return msg

However it doesn't work. The 2nd node is working but in total I would have like 150+ blocks connected to OPC UA Client block. So my question is: does anyone know if there's a way to inject multiple payloads with different topics, favorabily with function, instead of doing it one by one with inject blocks?

node.js node-red

share|improve this question

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

add a comment | 

I have a problem. I'm new to node red, I want to inject many payloads with different topics at once. I wanted to do it with function like in first node. It's function looks like so:

msg.topic="ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String"
msg.payload=global.get("nazwa")
return msg
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String"
msg.payload=global.get("nazwa2")
return msg
...
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String"
msg.payload=global.get("nazwa9")
return msg

However it doesn't work. The 2nd node is working but in total I would have like 150+ blocks connected to OPC UA Client block. So my question is: does anyone know if there's a way to inject multiple payloads with different topics, favorabily with function, instead of doing it one by one with inject blocks?

node.js node-red

share|improve this question

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

msg.topic="ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String"
msg.payload=global.get("nazwa")
return msg
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String"
msg.payload=global.get("nazwa2")
return msg
...
msg.topic="ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String"
msg.payload=global.get("nazwa9")
return msg

share|improve this question

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

share|improve this question

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

asked Mar 25 at 21:26

adammoadammo

2377 bronze badges

1 Answer
1

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2

The documentation explains how to send multiple messages from a status node.

With the code you have currently, as soon as it reaches the first return statement, the Function node stops processing any further so only one message is sent.

To send multiple messages from a Function node you have two options.

1. return an array of message objects to send.


2. call node.send(msg); for each message you want to send.

For example:

return [
 [
 topic: "ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String", payload: global.get("nazwa"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String", payload: global.get("nazwa2"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String", payload: global.get("nazwa9")
 ]
]

share|improve this answer

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, worked like a charm
  
  – adammo
  Mar 25 at 22:08
  

  
  
  
  

add a comment | 

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2

The documentation explains how to send multiple messages from a status node.

With the code you have currently, as soon as it reaches the first return statement, the Function node stops processing any further so only one message is sent.

To send multiple messages from a Function node you have two options.

1. return an array of message objects to send.


2. call node.send(msg); for each message you want to send.

For example:

return [
 [
 topic: "ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String", payload: global.get("nazwa"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String", payload: global.get("nazwa2"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String", payload: global.get("nazwa9")
 ]
]

share|improve this answer

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, worked like a charm
  
  – adammo
  Mar 25 at 22:08
  

  
  
  
  

add a comment | 

2

The documentation explains how to send multiple messages from a status node.

With the code you have currently, as soon as it reaches the first return statement, the Function node stops processing any further so only one message is sent.

To send multiple messages from a Function node you have two options.

1. return an array of message objects to send.


2. call node.send(msg); for each message you want to send.

For example:

return [
 [
 topic: "ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String", payload: global.get("nazwa"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String", payload: global.get("nazwa2"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String", payload: global.get("nazwa9")
 ]
]

share|improve this answer

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, worked like a charm
  
  – adammo
  Mar 25 at 22:08
  

  
  
  
  

add a comment | 

The documentation explains how to send multiple messages from a status node.

With the code you have currently, as soon as it reaches the first return statement, the Function node stops processing any further so only one message is sent.

To send multiple messages from a Function node you have two options.

1. return an array of message objects to send.


2. call node.send(msg); for each message you want to send.

For example:

return [
 [
 topic: "ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String", payload: global.get("nazwa"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String", payload: global.get("nazwa2"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String", payload: global.get("nazwa9")
 ]
]

share|improve this answer

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

return [
 [
 topic: "ns=2;s=Target01.Nazwa.Nazwa[0];datatype=String", payload: global.get("nazwa"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[1];datatype=String", payload: global.get("nazwa2"),
 topic: "ns=2;s=Target01.Nazwa.Nazwa[9];datatype=String", payload: global.get("nazwa9")
 ]
]

share|improve this answer

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges

answered Mar 25 at 21:37

knollearyknolleary

7,27811 gold badge1616 silver badges2828 bronze badges