16relind Nodes

[brydenver2]

Can you tell me on your node-red nodes for the 16 relay card, how do you dynamics set relay address for each relay? I set the msg.relay to say 4 and the msg.payload to true and it will not respond. If I set the input type of the node to msg.relay it then responds to relay 4 but payload does nothing. I can send a msg.stack, msg.relay and msg.payload but will only respond to the payload. Can you give me some insight?

 

[alexburcea]

Hi,
You must go to the node settings and set the relay number to zero so the node will look for for msg.relay to select the relay but you need also to set the payload. Please check the attached flow.

 

[brydenver2]

Thanks Alex,
I updated NodeJS to 18 and Node-Red to 3.1.3 and it still does the same thing even if I set the msg.relay to 2 it still sends the command to relay 1. I did notice that if I set the payload to 2 or 3 then it triggers that relay on the board but then I have set the payload to 0 to turn it off. The other thing that is strange is if I trigger relay 3 using payload then it will not respond to any other commands until I send a payload of 0. This is a fresh install with nothing running.

 

[alexburcea]

This is strange, have you try the attached example? You have to import it and give it a try.

 

[brydenver2]

Yep, I imported your flow and the behavior is exactly the same. Its acting like if the node payload is set to msg.payload then that's all it accepts and ignores all other objects.

 

[alexburcea]

Let me do a fresh install of the last Node-RED and get back to you. It is strange that on my 3.0.2 all is working as expected

 

[brydenver2]

What version of NodeJS are you running?

Also should this allow you to set multiple relay states or is it just only one on at a time? The Python script works just fine so it must be a NodeJS issue?
After changing up your flow I can select each relay in the node properties and that works properly but when I read the relay states for relay 1,2,3 ON I get a payload of 7 ??

 

[brydenver2]

I found the issue, the Stack and Relay values need to be deleted so it shows msg.relay and msg.stack in the values box.

 

[brydenver2]

I am still having one issue. On the Read Node when you set the relay to "0" and say with relay "10" ON it sends a payload of "512". If I set relay 2 and 3 to ON it send a payload of "6"? How does it calculate the payload? Is there a way to send an array for each relay?

 

[alexburcea]

The read is a bitmap of all the channels, 7 is binary 111.

I found the issue, the Stack and Relay values need to be deleted so it shows msg.relay and msg.stack in the values box.View attachment 43

Thanks for this, I designed that way but forgot about it.. at all

 

[alexburcea]

You can create a function that turn your 16bit number into an array.

 

[brydenver2]

You can create a function that turn your 16bit number into an array.

Gotcha, that makes more sense. Thanks for your help...

 

[alexburcea]

I am not sure your answer is sarcastic or not but if it is here is an example of what i was referring to.