A Radio Mesh Check-in System for Elders Living Alone: Delivery Reliability Budget for a Licence-Free LoRa-Class Network Without Smartphones or Internet

Design and delivery reliability budget for a fixed-node LoRa-class radio mesh check-in system for elders living alone, requiring no smartphone, no internet and nothing worn or charged. Under suburban assumptions, end-to-end check-in delivery from the most remote covered home is 0.9898 with two gateways; cost is $35.25 in parts per covered home with a five-year service interval. The design cannot cover 11.7 percent of elders in the stated settlement (isolated farmhouses) and falls to 0.5741 under modelled storm conditions. SIMULATED, NOT MEASURED: nothing has been built, installed or used by a resident.