Components:
- 12V dc solenoid valve (1/2'' NPT): https://amzn.to/2lUXOi2
- 1/4'' hose id to 1/2'' male npt adapter: https://amzn.to/2lUP8bp
- 1/2'' id to 1/2'' mip plastic hose adapter: https://thd.co/2k0pUYC
- Arduino Uno: https://amzn.to/2lUYaFo
- 4-channel relay module: https://amzn.to/2jTqdnS
- 5V power supply module: https://amzn.to/2kp17O0
- 12V dc power supply: https://amzn.to/2lzRrjL
- Soil moisture sensor (resistive): https://amzn.to/2lAps3t
- Capacitive soil moisture sensor: https://amzn.to/2ltxOdk