GrouuPro — the V0 greenhouse
GrouuPro, 2013–2014. A greenhouse with an automated fertigation system for four raised beds. Built: sensing, cloud logging (Temboo → Google Sheets), local actuation. Designed, not built: the server app, remote control, automation. Sole author; build assistance by Rui Lopes.
What it was
GrouuPro was the V0 origin of GROUU — a built greenhouse with a four-level fertigation cabinet serving four raised beds. An Arduino Yún sensed and actuated locally and published to a Google Sheet via Temboo; a fuller server app was designed but never built. It is the root of the sense → publish → visualise architecture everything since inherits.
As built: sensing → gateway → cloud log; local actuation through the cabinet.
Designed 2014, never fully built
The envisioned architecture — one central core, wired probes — and the module map of the server app that was planned but never built.
A limited set of probes cables into the Yún — the Arduino MCU runs sensing + global actuation (multiplexed I/O); Linux is the server: local edge, or — as deployed — Temboo publishing to a Google Sheet.
Cabinet + plumbing
The four-level armário on the left; the water path it drives on the right. Glazed structure in LEXAN 8 mm on BWF aluminium; no custom PCB — pumps/motors on perfboard MOSFETs.
Yún gateway, Uno probes, Temboo
Three Arduino sketches: the Uno probes read analog + 1-Wire sensors and ship them over I²C (I2C_Anything) to address 42; the Yún gateway collects them, drives the cabinet — servo (pin 9), pumps BPER_1..6, main pump BR_P, valves — through the MOSFET perfboard, and, via the Linux Bridge, hands readings to a Temboo AppendRow choreo that timestamps a row into the "GROUU_EXP" Google Sheet. Local actuation only; no remote control. Committed credentials are redacted.
The module flow of the planned server app, from the outline.
Built vs designed
The greenhouse, cabinet and sensing were built and ran; cloud logging worked through Temboo. The fuller server app (login, per-bed tests, fertigation scheduling, dashboard) was designed in the outline but never built — the bus-limited, single-core architecture is exactly what the modular WiFi/LoRaWAN + MQTT-stack direction replaced. Archived, not in active development.
The build
In the archive & related
The firmware, the master-plan outline and key drawings are committed; the 1.5 GB of CAD, renders and raw photos are catalogued in the manifest and referenced on backup. (Temboo/Google credentials in the sketches are redacted.)