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| To circumvent this limitation, the raspberry pi is used as a wireless access point running a standalone network. | To circumvent this limitation, the raspberry pi is used as a wireless access point running a standalone network. | ||||
| the sensors will connect to this standalone network, in which the gateway is the host with a static ip-address, and send their gathered data via the network to the gateway for further processing. | the sensors will connect to this standalone network, in which the gateway is the host with a static ip-address, and send their gathered data via the network to the gateway for further processing. | ||||
| To communicate with commercial sensors the radio-tranciever HM-MOD-RPI-PCB from ELV is used. | |||||
| It provides an easy to use 868,3/869,525 MHz radio tranciever which connects to the raspberry pis GPIO-Pins | |||||
| 3. THE SETUPS SOFTWARE | 3. THE SETUPS SOFTWARE | ||||
| [IMAGE] | [IMAGE] | ||||
| The smart home environment is comprised of three key layers: | |||||
| the logic-layer with node-red and node-red-dashboard implements the logic for the presencedetection and the graphical user interface. | |||||
| node-red is used because it provides an easy-to-use flow-based programming interface. | |||||
| data is represented by nodes | |||||
| mqtt is the protocol used in the networking-layer to relay data coming in from sensors to the logic-layer. | |||||
| the interface-layer is used to connect |
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