I have used the randomSeed function to generate a 'random' value between 0.5 & 2.5 that is used with the delay() command. I was using the last available analog input (A5) on my UNO Wifi Rev2 to supply the input value for randomSeed. I now need that analog input for another field input. What are…

[image] edthewino: Can I reference an active AI with randomSeed even though it is receiving a temp or voltage input? It MIGHT actually work BETTER if there is a wide range of unknown-unpredictable analog readings. i.e. If it's more variable-unpredictable than a floating analog input. If …

Generally, with pseudo random number generators, the seed is just so that you don't get the same sequence, unless you want it. Ideally, you seed only once -- the library will do that anyway if you don't -- and the sequence of internal values that gets generated is random enough for most uses (crypto…

How much randomness do you need? What hardware do you have? RTC? Old computer games used “press a key to start” and then something like: randomSeed(random()+micros()); … to get different sequences per run.

if you have a clock in the software use the seconds as a seed. if you don't have a clock, use millis()

[image] edthewino: ...0.5 & 2.5 that is used with the delay() command... Which core are you using that allows floating point numbers with the delay function?

Your question just submerged my head under the water. I do not have a clue about "which core" unfortunately. It is an interesting question nonetheless.

It might have been helpful to provide some background to my need for the random function. That being that I am dumping a domestic water psi value into a structure array whenever the value changes more than 3 psi up or down. What I discovered is that the stored values were all ending with essential…

[image] Delta_G: BTW: I think @Coding_Badly was trying to make the point that you can't use decimals in the delay function. It only takes whole numbers. Uh oh! I did not know that. I wonder why that is? Does it just truncate anything left of the decimal place? edit - Ed the Dummy just now r…

[image] edthewino: What I discovered is that the stored values were all ending with essentially the same value "right of the decimal point." Example being: 35.30 ; 38.30 ; 32.30 and so on up and down. That may be the result of how you are calculating pressure.

[image] Delta_G: It's always a good idea to take a few minutes to look at stuff like this page for any function or library you're going to use before you start. It will save you a lot of time and headache in the end. Your being nice instead of calling me lazy. ...lol... Sage advice nonethele…

Options using randomSeed function

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sterretje May 23, 2024, 3:32am 7

No pin needed: The reliable but not very sexy way to seed random; as stated in the opening post, the last version is in post #53.

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Options using randomSeed function

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