TIDUED6B august 2018 – april 2023
This design leverages TI's SimpleLink TI-15.4 Stack to implement a star network. The TI-15.4 Stack implements the standard IEEE 802.15.4e, IEEE 802.15.4g specification and is designed to run on SimpleLink CC1352 ultra-low-power MCUs. The TI 15.4 Stack supports different modes including frequency hopping where network devices hop on different frequencies, beacon mode where the network coordinator transmits periodic beacons to indicate its presence, and non-beacon mode where the coordinator does not send out periodic beacons.
The network consists of a central device, or collector, and one or more sensor nodes. The collector performs the functions of a network coordinator (starts the network, allows devices to join the network) and receives data from the sensor nodes. The collector then sends periodic tracking request messages (to which it expects tracking response messages) to determine whether or not the sensor nodes are alive in the network.
Sensor nodes join the network started by the collector. They send sensor data reports to the collector and respond to the tracking messages sent by the collector. The sensor nodes also poll for messages from the collector allowing for two-way communication.
This TI Design together with a CC1352 LaunchPad implements the function of the sensor node and collector node. The TI-15.4 Stack is configured for operation in the 915-MHz frequency band (frequency hopping disabled), non-beacon mode enabled, and transmit power set to 12 dBm.