sí = smart irrigation

1769.eu/si

low-tech smart irrigation system for urban/school gardens. join our team :)

Basic Components:

• LM2596S DC-DC power supply adapter step down module
• Microcontroller (e.g Arduino Uno)
• Analog Capacitive Soil Moisture Sensor, DC 3.3 to 5V (e.g KeeYees)
• 5V Relay for Arduino
• optional: DC 12V G3/4 normally closed brass electric solenoid valve for water (e.g. FPD-270A)
• optional: DC 12V water pump (800 l/h / heigt 5 m, brushless submersible)

links

Why most Arduino soil moisture sensors suck (incl. solution)
Soil Data APIs
5 Types Of Soil Sensors
Soil moisture monitoring: a selection guide
Soil moisture sensors—How they work
Water retention curve

improvement

soil moisture sensor types:

• resistive
• capacitive
• time-domain reflectometry (TDR)
• frequency domain reflectometry (FDR)
• ion-sensitive, ISFET
• water potential sensors (Ψ): tensiometers, granular matrix sensors

other soil sensors:

• temperatur
• PH
• NPK nitrogen, phosphorus, potassium
• salinity