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Watering system with Attiny85 and i2c moisture sensor.

FEATURES:

• Measures soil moisture, light and temperature.

• It waters only at night.

• It doesn't water if temperature is below 4ºC.

• It waters depending on a preset value and a hysteresis.

• It takes measurements every hour, then microcontroller goes to deep sleep.

• If it irrigates, then checks moisture again after five minutes.

BILL OF MATERIALS:

• Valve: https://www.aliexpress.com/item/Free-shipping-Plastic-solenoid-valve-12VDC-for-drink-water-air-6-35mm-1-4-Quick-plug/1411672083.html?spm=2114.13010608.0.0.Ew7MCd

• I2C Soil moisture sensor: https://www.tindie.com/products/miceuz/i2c-soil-moisture-sensor/?pt=full_prod_search

• Enclosure: https://www.aliexpress.com/item/New-1-PC-Waterproof-115x90x55MM-Cover-Plastic-Electronic-Project-Box-Enclosure-Case-VE837-P0-3/32701644399.html?spm=2114.13010608.0.0.FBugqX

• Attiny85

• MAX663CPA

• 2N7000

• BS170

PICTURES: