Chapter · LoRa
Rules, sharing and the battery
The rules where you live, shared spectrum and collisions, and a day in the life of a battery node.
- 07The rules where you live5 minThe chip's maximum output is not the power you may use. This lesson separates conducted power, ERP and EIRP, reads the AU915 plan and licence limit, and compares Europe and the United States.
- 08Shared spectrum and collisions4 minLoRa nodes send when they have something to say, without asking. This lesson shows when two packets overlap, when both are lost and when the stronger one survives, and why no setting makes delivery certain.
- 09A day in the life of a battery node5 minHow long a battery node lasts is a sum of sleep, awake time, transmit airtime, receive windows and regulator loss. This lesson builds it for one probe, shows which part dominates and qualifies the answer in years.
Start at 07 and read down — the order is the order things get easier in. Or take the one with your part in it; every article stands on its own, and links back to whatever it needs.