Problem with number converting from mqtt retained messages

[afelix]

The reason you’re seeing these errors is because your properties contain slashes which are interpreted as divisor rather than part of the name. I saw this same issue explained to someone else a couple days ago, let me dig up the post for you. You can follow the instructions there to get rid of this error, then continue with the next part: following the instructions of those posting above me.

How to create function on rpi node red with two gpio - if gpio1 == 1 && gpio2 ==0 then gpio3=1

Ah the joy of javascript.... your combined payloads look like this [image] all good so far Then your function does this if (msg.payload.pi/35 == 1 && msg.payload.pi/37 == 1) { which is a natural thing to do... but javascript doesn't like / in property names so it will be treating it like a divide :-)... so instead you need to do if (msg.payload["pi/35"] == 1 && msg.payload["pi/37"] == 1) {