White Paper — How to Deploy a LoRa®-based Network for your IoT Application Page 7 of 8
The Sensor Nodes
The sensor nodes of the Dots on a Map solution are where all of the data sampling takes
place. As such, each node contains a wide array of sensors so that many use-cases can
be addressed with a single hardware design. The RX231 is the central component of the
sensor end node. All of the sensors are connected to the RX231, the majority via I2C
interfaces, while the others are connected through SPI and UART interfaces. The RX231
is responsible for sampling all of these sensors and then communicating the sensor data
to the gateway through the LoRa radio frequency. Refer to the following block diagram for
more detail.
Each sensor node is designed to operate both indoors and outdoors using an enclosure
that has ventilation and moisture protection. A standard SMA connector is exposed for
attaching a LoRa antenna, and both micro-USB and banana plug options are exposed for
providing power to the unit.
