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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

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1:05 Energy 29 Wh Peak power 1841 W peak

The ritual commenced at 15:10, brewing away for 1.1 minutes, drawing 28.7 Wh (peaking at 1841 W). Right then. Let's get on with it. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1:00 Energy 27 Wh Peak power 1819 W peak

Coffee time at 08:47 — 1.0 minutes of hot extraction, drawing 26.8 Wh (peaking at 1819 W). Well, someone had to do it. ☕

Yesterday

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1:35 Energy 37 Wh Peak power 1820 W peak

Coffee time at 15:13 — 1.6 minutes of hot extraction, drawing 36.7 Wh (peaking at 1820 W). Productivity restored. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 0:40 Energy 14 Wh Peak power 1707 W peak

Starting at 08:54, the machine ran for 0.7 minutes, drawing 14.2 Wh (peaking at 1707 W). Worth every watt. ☕

Tuesday 3 November 2026

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1815 W peak

Starting at 14:48, the machine ran for 0.6 minutes, drawing 15.8 Wh (peaking at 1815 W). Right then. Let's get on with it. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 0:20 Energy 10 Wh Peak power 1764 W peak

Grounds in, water through — 0.3 minutes from 10:19, drawing 9.7 Wh (peaking at 1764 W). Another fine cup. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1699 W peak

The day called for coffee — 0.6 minutes of brewing from 08:36, drawing 15.6 Wh (peaking at 1699 W). Civilisation, one cup at a time. ☕

Monday 2 November 2026

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1790 W peak Steamed milk 60 s milk

Another brew got underway at 15:29, taking 0.6 minutes, drawing 15.6 Wh (peaking at 1790 W). Then the steam wand hissed for 60 seconds and a jug of milk became a cloud. 🥛 No notes. Only coffee. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 0:25 Energy 12 Wh Peak power 1832 W peak

Starting at 09:45, the machine ran for 0.4 minutes, drawing 12.0 Wh (peaking at 1832 W). Civilisation, one cup at a time. ☕

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1668 W peak

The ritual commenced at 07:20, brewing away for 0.5 minutes, drawing 13.9 Wh (peaking at 1668 W). Right then. Let's get on with it. ☕

Sunday 1 November 2026

El Salvador Finca Serbia Santa Ana (opens in a new tab)

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 1808 W peak

A brew kicked off at 10:45, running for 0.5 minutes, drawing 14.1 Wh (peaking at 1808 W). A good extraction is its own reward. ☕

October 2026
37 cups

26 Biscuit Blend · 11 El Salvador Finca Serbia Santa Ana

Energy 607 Wh 22m 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