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The Coffee Log

Every brew, logged.

Welcome to The Coffee Log. A fun little side project I documented in a blog post.

I use a Wi‑Fi plug that reports power usage. When I switch on my coffee machine, a Raspberry Pi in my office detects the power spike and automatically posts a new entry to this page.

Each entry gets a timestamp, and unless I manually update it with the specific coffee I’m brewing, it automatically carries over the bean information from the previous entry. That keeps the input minimal while still letting me track which beans I’ve been enjoying.

It’s simple, automated, and extremely coffee‑geeky — exactly how I like it.

Today

Biscuit Blend

The Bean Shop (opens in a new tab)

same as last time (no coffee was selected for this entry, so it's assumed to be the same as the previous brew)
Brew time 0:30 Energy 14 Wh Peak power 1698 W peak Steamed milk 65 s milk

Beans met water at 14:55, brewing for 0.5 minutes, drawing 13.9 Wh (peaking at 1698 W). Steamed for 65 seconds. The milk is now 90% air and 100% smug. 🥛 Well, someone had to do it. ☕

Biscuit Blend

The Bean Shop (opens in a new tab)

same as last time (no coffee was selected for this entry, so it's assumed to be the same as the previous brew)
Brew time 0:35 Energy 16 Wh Peak power 1612 W peak

Caffeine was converted to code at 08:33, brewing for 0.6 minutes, drawing 15.7 Wh (peaking at 1612 W). The machine delivered. As always. ☕

Yesterday

Biscuit Blend

The Bean Shop (opens in a new tab)

same as last time (no coffee was selected for this entry, so it's assumed to be the same as the previous brew)
Brew time 0:35 Energy 16 Wh Peak power 1689 W peak

Beans met water at 15:55, brewing for 0.6 minutes, drawing 16.4 Wh (peaking at 1689 W). Grounds for optimism. ☕

28 Sep–4 Oct
7 cups

7 Biscuit Blend

Energy 114 Wh 4m of brewing
September 2026
10 cups

10 Biscuit Blend

Energy 181 Wh 7m of brewing
August 2026
1 cup

1 El Carmen

Energy 30 Wh 2m of brewing
July 2026
59 cups

57 El Carmen · 1 Costa Rica San Fran · 1 Indian Monsooned Malabar

Energy 1,735 Wh 2h 46m of brewing
June 2026
20 cups

15 El Carmen · 5 Brazil daterra sunrise

Energy 550 Wh 1h 9m of brewing