Meet the PlantLink : a smart soil sensor that helps you take better care of your indoor/outdoor plants. It monitors the moisture level and lets you know when your plants need some water. It has a database of different soil types and over 50k plants. The companion app helps you optimize the watering schedule for your plants.
PlantLink has a wireless range of up to 100 yards. You can monitor up to 64 plants with a single base. This smart gardening system helps you conserve some water as well. Sets you back $79 at this time.