DLP-RFS-LOCATOR DLP Design

DLP-RFS-LOCATOR DLP-RFS-LOCATOR RANGING AND LOCATING DEMONSTRATION ONE MASTER, MANY TARGETS OVERVIEW In this demonstration system, there is a single Master transceiver and up to 50 Targets. The hardware for the Master is hand-held and battery powered. DLP-RFS-LOCATOR - Master Version 3.0 Rev 1.0 (May 2018) 1 DLP Design, Inc. A Learn Mode is initiated whereby the Master requests 16-bit IDs from all Targets within range of the Master using LORA Mode with spreading factor of 12, and stores the IDs to non-volatile memory. Once all of the Target IDs have been learned and stored, a Search Mode can be initiated whereby a specific Active Target is selected by the user from the stored IDs, and the direction to that Target transceiver is determined using a directional antenna and RSSI values received by the Master from the Target. The Master then uses the Ranging feature of the Semtech SX1280 transceiver chip to determine the distance to the selected Target transceiver. All data is presented on an LCD display during Learn, Search and Ranging operations. During the Search process, an audible tone is also used to indicate the direction to the Active Target. LEARN MODE The system is set up and ready for this demonstration once all Target transceivers are powered and set to LORA Mode. If a Target is set to GFSK or FLRC Mode, simply press Button 1 until LORA is shown in the display: DLP-RFS1280ACT DEMONSTRATION PLATFORM (Serving as a Target for this demonstration) To initiate Learn Mode, the user would hold down the LEARN Button on the Master and turn the power on. Rev 1.0 (May 2018) 2 DLP Design, Inc.