Hydroponic vegetable seedling raising system based on Internet of Things control

A hydroponic vegetable seedling raising system based on Internet of Things control comprises a cultivation box, a water inlet pipe is fixedly installed on the cultivation box, a drainage pipe is fixedly installed on the cultivation box, four limiting rods are fixedly installed on the inner bottom wall of the cultivation box, a foam plate is jointly and movably installed on the four limiting rods, and a cultivation box is installed at the top end of the foam plate in a clamped mode. The seedling cultivation device has the advantages that the foam plate can drive the cultivation box to ascend and descend along with the water level, it is ensured that seedlings can continuously absorb nutrient solution from water, the water can be discharged from the interior of the cultivation box by opening the drainage pipe through the second electromagnetic valve, the water level sensor is arranged in the cultivation box, and the water level sensor is arranged at the top end of the cultivation box. When water in the cultivat