How it works
One sensor, four things it does every 10 seconds.
GreenGo is a single ESP32 unit sitting in the greenhouse. Here's exactly what it measures, how it talks to you, and what happens when the soil runs dry.
01
Sensor reads the soil
A calibrated resistive bridge measures soil moisture. A DHT11 reads air temperature and humidity. An LDR adds ambient light — provisional, may be dropped.
02
It shows on the LCD, right there
A 20×4 character screen draws each reading as a blocky bar graph, built from custom LCD segment characters — no phone required to check.
03
And reaches your dashboard
The same reading is pushed to the web dashboard, and an SMS goes out the moment soil drops below your threshold.
04
The pump responds
In AUTO mode the relay switches the pump on. In MANUAL, a physical switch on site has the final say — remote control is disabled and says why.
The hardware
An ESP32, a probe, a relay, and a switch you can trust.
Soil moisture bridge — resistive probe, calibrated per device in the setup wizard.
DHT11 — air temperature and relative humidity.
Relay + pump — switched by AUTO logic or your command, never against the physical MANUAL switch.
Buzzer — sounds on site when soil crosses dry.
Signal & battery — reported every cycle, so you know when a reading is stale, not just wrong.
Want to see it running, right now?
Our one device, in our one greenhouse — a public, read-only view.
See the live demo