I want to know how to un/set bits in a message/variable. What I find is not clear for me to understand.

[image] Trying_to_learn: For the sake of it: bit 2. function setBit(number, bitPosition) { return number | (1 << bitPosition); } var currentVal = 0; var newVal = setBit(currentVal, 2)

[image] Node-red-contrib-remote-io, digital output for joining bool to word General If you mean combining bits to make a WORD value - its just basic math functionality of the programming language. e.g.... //Get bit function getBit(number, bitPosition) { return (number &…

Thanks, but Mr Stupid is not really getting it. Sorry, but could you give a better example of how to set a bit? For the sake of it: bit 2. Appreciated.

There is a node contrib-bitunloader that does a lot of what you are asking. Even if you don't use the node itself you could crack it open and look at the code. NOTE: it also loads a second node called bit unloader that may provide useful code

So I need to put the function above the code, not below? (Thanks. Shall try now)

As a professional bit-twiddler (writing device drivers and the like) I can say it's a skill worth learning for anything to do with low-level coding. I think @Steve-Mcl has provided the basic functions above, but additionally it's worth learning how the bit values go, and ways to represent them. De…

[image] Trying_to_learn: So I need to put the function above the code, not below? Doesn't matter Understanding Hoisting in JavaScript | DigitalOcean .

@molesworth Thanks. Yes, I do get what you are saying. But I am facing a problem (see other thread if you want) and it is becoming painfully clear I need to set bits to indicate status. So I am going to use bits to reflect the status of the devices. Yes, I need to learn about it more but for …

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How to set bits in a variable

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Steve-Mcl 28 December 2020 20:56 2

Any good?

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How to set bits in a variable

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