# Decision: radio for the sensor nodes (2026-01-26)

Context: the greenhouses are 120 m from the house; Wi-Fi reached two of three in tests.
Options: (1) Wi-Fi with a mesh extender in each greenhouse; (2) LoRa with one `gateway.md`.
Chosen: option 2, by the owner. Why: one receiver covers all houses and a `sensor-node.md` lasts a year on batteries.
Not chosen: Wi-Fi (three extenders to power and patch; battery life about 6 weeks).
Review trigger: more than 40 nodes, or a reading every minute.