Growbud works with soil, coco, and rockwool. The sensors use a long range, lower power wireless link which allows them to last a full growing cycle on a single charge.
Download the Growbud app from the App Store or Google Play. Follow the in-app instructions to connect to your Growbud using Bluetooth.
Once connected, your Growbud will alert you if it detects soil or air conditions need to be adjusted.