Minimum Viable Arduino Project: Aeropress Timer

This is the first I'm hearing an aeropress 30 second plunge time, what's that about?

Its just how long you are meant to let the coffee brew. Try if you make tea you need to let bag steep for a minute or 2. But actually timing it???? Useful if you are a goldfish may be but otherwise i dont understand who can’t remember to do something in 30 seconds.

Fwiw i oftrn let me aeropress brew for a few minutes. 30 secs is hella short.

That’s indeed quite short for a brew time. 30s is your typical plunging time

There are many different ways to use the Aeropress. I'd assume that the recipe the author is following simply asks for a 30 second steep time.

I personally found that the time actually doesn't matter that much, you control extraction by grind size, water temperature and agitation. It might be that if you grind too fine you can still reduce extraction by cutting the time short, but that seems rather inconvenient for this method.

I usually let it steep for 5 minutes, but the exact time doesn't change much. Shorter times aren't that desirable for me anyway as the coffee is still too hot then as I start with boiling water.

The idea is that the more pressure you use, the more unwanted materials like fines and oils will get though the paper. So if you press slowly and stop when you hear a hiss, you should have a better brew.

It does make sense, if imagine pressing through in 5 seconds vs 30 seconds, that the paper filtration would work better in the slower press. But I'm not sure if anyone has scientifically measured this.

Actually wait, it's coffee. Someone has definitely scientifically measured it and probably published a two hour YouTube video with their results.

30 seconds is indeed the _original_ Aeropress recommended brew time. [1] You're supposed to mix the grounds and start plunging nearly immediately, finishing in about 30 seconds. So, indeed, much of the water passes through even before 30 seconds.

That was way too short. It looks like they've finally updated the instructions somewhat, now recommending 60 seconds before starting to plunge. [2]

It works because they also recommend a very fine grind, but that's still pretty short. It looks like Counter Culture recommends using regular pour-over grind and the inverted method and 2-3 minutes, [3] which happens to also be what I do. Though I'm not really particular, so long as it's somewhere between about 1.5 and 3.5 minutes. (Breakfast is a hectic time while also handling kids...)

1. https://www.seattlecoffeegear.com/pages/product-resource/aer...

2. https://aeropress.com/pages/how-to-use

3. https://counterculturecoffee.com/blogs/counter-culture-coffe...

I've had good results from the James Hoffman recipe [0], although I brew inverted. You can push the plunger down with just the weight of resting your arm on the plunger. For something very different, you can brew something not-quite-espresso using the Fellow Prismo cap for the Aeropress.

0: https://www.youtube.com/watch?v=j6VlT_jUVPc

Personal opinion is that the whole point of aeropress is that you don't need to follow any recipes to get a good result. The parameters are extremely flexible to the point of being close to foolproof. Start with good beans and water. Grind anywhere between French press and very fine pourover level. Brew anytime between 1 minute and 8 minutes. Add anywhere between 100ml and 200ml of water. Press reasonably slowly.

The results will always be good. Maybe not the level you'd get with extremely high quality light roasted beans and a very careful pourover technique, but maybean aeropress isn't the best brewer for those beans in the first place.

The grind is the most important part I think. Super fine espresso grinds taste the best for me. Coarser, like french press grounds, need a longer agitation/agitation time but still have less taste.

30 seconds works fine for other semi-pressurized brewing methods like turboshots or soup.