To set the context the video linked, it is necessary to remind our project. We are working on the auto-regulated greenhouse. The regulation will perform according three parameters: the luminosity, the temperature and the humidity. At this moment, as you can see on the small movie, everything is functional. Moreover, all of these parameters are sticked on a plasma screen. The last thing that needs to be done is the assembly with the greenhouse structure.
The temperature is very important for the vegetables growing. The temperature can be to high in summer to prevent for the vegetables life. As a result, our Arduino’s system will adjust the temperature thanks to the opening of windows to get fresh air and thus, decrease the temperature inside. If the temperature sensors get a too high temperature, the opening is performed thanks to 2 servomotors linked to the window’s hinges. Depending of the greenhouse temperature, the windows are more or less opened.
The humidity is essential for a good vegetables growing as well. In fact, the plants don’t have to be thirsty otherwise they die. In the present project, this parameter is also regulated. In fact, if this parameter is not enough, the Arduino’s system set an hydraulic pump on to distribute water to vegetables. If this parameter comes back to a right value, the pump stops. Obviously, the water flow varies according to the humidity shortage. We had to use a mosfet transistor and a electric relay to be able to provide electrical energy enough to the pump. Indeed, our Arduino couldn’t provide a sufficient tension to set in motion the motor’s pump. On the linked movie, the pump is not present and has been replaced by a led. However, it is functional because we can see the luminosity variation according to the humidity level.
This parameter is critical for the vegetables. Indeed, the luminosity can’t be too high because it could lead to the leaf burning and thus the death of the plant. This is the reason why we decided to regulate factor thanks to the rolling of stores. As you can see on the model on movie, when the luminosity sensor detect a too high light, the Arduino’s system commands motors linked to stores to protect the vegetables against the sun rays. In our project, we will simulate the store’s rolling with some leds while be activated when the stores must be rolled.
see you next week
edit 04/05 : new link for the video