Watering-System-SMD

Watering system with Attiny84 and i2c moisture sensor.

THINGSPEAK LINK:

https://thingspeak.com/channels/339098

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.
Measurements are uploaded to thingspeak.com

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
Attiny84
MCP1703
2N7000
AO3400
ESP-01

TO IMPROVE

Change protection diode with a schottky diode
Add a resistor in serial with diode D2 to close the EV slower
Connect the electrovalve and the diode D2 after the diode protection diode.

PICTURES: