Adding new device types to nymea is done with plugins. With some development skills and if the hardware is not vendor-locked, it's rather straight forward to add such a plugin. This post shows one approach to create a plugin by the example of the Xiaomi FlowerCare sensor.
The threat of Day Zero in Cape Town (South Africa) has made the citizens aware of the value of water. Together they managed to reduce average water consumption by more than 50 %. Throughout the world, the climate change will make water a rare good in areas where it used to be taken for granted. With smart irrigation systems, water consumption can be monitored and probably even reduced. I want to show you the success factors in your area of application, and recommend what I believe to be the best technologies.
Smart Irrigation is not only about saving water or having healthier plants. It is mostly convenience that convinces the consumer to buy a smart irrigation system. Most people don't want to have to worry about their garden. They just want it to be a place to relax.