Controlled Area Network (CAN) bus systems designed for greenhouse monitoring have been proposed to measure soil moisture content, yet they are still absent from hydroponic systems. In this study, irrigation control, monitoring of substrate moisture levels and temperature were achieved using a CAN bus system connected to hydroponic beds. In total, five nodes were mounted on five hydroponic beds and two irrigation methods were compared on lettuce and kale: first, where a pre-set timer activated the irrigation pump, and then, when irrigation pumps were activated, then stopped, using predetermined minimum and maximum moisture levels. A statistically significant effect (p<0.01) on plant height, dry and wet mass was achieved after 29 days of growth. Highest yield was measured in the control treatment and lowest in the 25%-85% treatment. Overall, the CAN bus system can improve moisture and temperature monitoring in hydroponic beds and can optimize irrigation for individual crops species to achieve higher yield and to minimize the risk of water stress