Hydroponic Plants Monitoring System based on Single Board Computing in Order to Increase Food Security in Bali

To optimize agricultural yields on increasingly shrinking agricultural land in Bali, hydroponic cultivation is the solution. Compared to conventional planting, hydroponic planting uses different methods. This method causes one disadvantage in hydroponic planting. The weakness is the skill of farmers in monitoring their crops. To help farmers monitor their hydroponic plants, a system is needed. The system should be able to monitor and inform farmers about the condition of their crops. This study designed and built a hydroponic plant maintenance system using a single board computer, microcontroller, sensor, and actuator. The microcontroller is used to collect data from sensors. Next, the data is forwarded to a single board computer to be processed into information. The information will be forwarded and stored into the server, and then continued to the farmers concerned through smartphone devices which are connected to the internet. Then, the farmers make decisions according to the information. On this system, a single board computer, microcontroller, sensor, and actuator are in a local connection. Single board computer that is connected to the internet in such a way, that it is able to transmit data to the farmers’ smartphone devices. The communication between single board computer and microcontroller is using web services based on JSON-RPC, and from the single board computer to the farmer’s devices is using web services with the REST architecture. The conclusions from this study are the system built is able to monitor the hydroponic plants and inform the farmers using their smartphone.