A new prototype based on our IoTForce framework has launched. The prototype is based on low-cost hardware to monitor the moisture in the soil and irrigate the plant based on a 5v motor that pumps the water. The moisture can be configured through Salesforce and the lectures from the sensor can be monitored. The intention is to create a centralized hub with an ESP32 in order to monitor multiple plants, and all the data can be reported or monitor in Salesforce.
You can check the code in github for more details about the idea.