How do I write to 2nd output on a function node

[Toshi Bass]

Hi

I have a function node that outputs a 1 or 0 depending on the incoming mqtt message.

if (msg.payload=="Lamp=1"){

  msg.payload= 1;

  return msg}

else if (msg.payload=="Lamp=0"){

  msg.payload = 0;

  return msg}

ok but I want to convert the function node to have 2 outputs first output as above  Lamp=1 .. 1st message payload is1 and 2nd message.payload is 0      if Lamp=0 .. 1st massage payload is 0  2nd message payload is 1

Imagine 2 leds connected to the 2 outputs from the function node a red led and a green led when Lamp=1 the green led is on the red off the when the Lamp=0  the green led is off and the red led is on

Ive banged my head against this afternoon but I just don't get how to send the message payload to the second output on the function node.

[Nicholas O'Leary]

Have a read of the Multiple Outputs section of http://nodered.org/docs/writing-functions.html and let me know if that solves it for you.

Nick

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[Dave C-J]

do the docs help ? http://nodered.org/docs/writing-functions.html

see the section on multiple messages...

[Mark Setrem]

The bit that is not explicitly stated on in the instructions is that you need to declare the object first.
.
So for example if you are using msg2 as the message to send to the second output, you need:

msg2={};

at the start of the function.

Otherwise you'll get the error message that msg is not defined.

[Dave C-J]

Thanks - have made that example more explicit.

[Toshi Bass]

Strange I did post a response to Marks post yesterday but obviously it went astray anyway essential it said :

Thanks Mark for the  msg2={};  thats what I was missing all the time ..... for anyone following here's what I ended up with (Im a python man don't have much experience with other languages but learning slowly.

msg1={};

msg2={};

if (msg.payload=="Lamp,1"){

  msg1.payload = 1;

  msg2.payload = 0;

  return [msg1,msg2]}

else if (msg.payload=="Lamp,0"){

  msg1.payload = 0;

  msg2.payload = 1; 

  return [msg1,msg2]}

Toshi