This is a Node Red node to manage connection to the SDS011 sensor on a Raspberry Pi. It allows you to specify the variables that define the connections to the sensor. This node is added to the Raspberry Pi section.
Alternatively the sensor can be connected via network (TCP/IP). This is useful for running this node on Android in combination with one of the Bluetooth-to-TCP bridge apps. In this case you can specify the network server IP and PORT parameters as tcp://IP:PORT in the node parameter port, i.e.: tcp://192.168.1.123:7777