> But, my ELI5 to myself: BLE beacons are already using ISM, so if your goal is to retransmit an ISM signal that beats the noise floor you're using to harvest R

> But, my ELI5 to myself: BLE beacons are already using ISM, so if your goal is to retransmit an ISM signal that beats the noise floor you're using to harvest RF in the same range, efficiency is going to have to be phenomenal in your system design (or take advantage of some power differential). Harvest in one range (ex: 5.8GHz) broadcast into another (ex: 2.4GHz)