Hi, Im very new to NodeRed and as a result I am stuck on the following: Im trying to create a series of timers to select different radio station during the day that will turn off and on set by the timers and also by presence. The problem Im having is with the switching of the amp on and off. If w…

I tried so many times to get the logic working after going through old post etc. I knew it was reliant on the topic but was and having no luck at all hence my cry for help. It was this last comment that help clear thing up for me. Help with logic switching Got it all working now. Thanks for your h…

Welcome to the forum @trevor . I believe node-red-contrib-bool-gate will do what you want. Make sure each of the input values that you want to combine together has a unique topic and the node will remember the most recent value for each topic and give you the answer. In fact I think you may want …

Thank you Colin, I did try your contrib you refer to and yes I would need an OR gate for the 'on' condition but could get it to work putting it down to the inputs not changing together. Didn't realise the gate will remember its most recent value. I will have another look at this. Thanks again.

Just a follow up on the above. After testing Im finding the 'OR' gate I have set up works but as I have 3 inputs 'ON', OFF' and 'OFF', when I trigger those 3 inputs at the same time, I get three output signals showing in the debug node. The 3 inputs to the 'OR' gate from the timers are: 25/08/20…

If you expect all three inputs to appear at approximately the same time then you can feed the output into a Trigger node set to Send Nothing then after, say 0.1 seconds send the Latest Message, with Extend Delay set. Then you will only get the last message passed on. Alternatively, if you are extr…

Thank you, the triggers seem to have worked in cleaning up the message and making the flow more stable.

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Help with logic switching

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Colin 22 August 2020 12:27 4

The key thing is to make sure each input has a different topic. It has to remember the previous value because all nodes only get one message at a time, they never come in at the same time.

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Help with logic switching

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