Node RED activating different elements/diodes with Dashboard slider

Dashboard
1

Hello to All,

I used the Dashoboard slider to activate different elements, in my case raspberry pi 4 GPIO connected to diodes. The idea is that the slider has 4 steps 0, 1, 2 and.

When the slider is on 0 no diode shines.

When the slider is on 1, 1 diode shines.

When the slider is on 2, 2 diodes shine.

When the slider is on 3, all 3 diodes shine.

Just for information I also use links as the raspberry pi logic is in another flow. For interacting with raspberry pi I use the module " node-red-node-pi-gpio" (you need to have Node-RED on the raspberry pi, to control its GPIO pins)

https://nodered.org/docs/faq/interacting-with-pi-gpio

The function "Func1" to make the fist diode to shine, when the slider is 1, 2 or 3 position is:

if (msg.payload == 1 || msg.payload == 2 || msg.payload == 3)
{
    msg.payload = 1;
} else {
    
    msg.payload = 0;
    
}
return msg;

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image831Ă—261 11.7 KB

image

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2

Try this, It will send 1 or 0 to corresponding outputs depending on slider value.

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