I am looking for all-in-one sensors that I can buy off the shelf.
All-In-One means that they should have BLE and Battery in the device itself! I would be looking for Temperature, Humidity & Proximity sensors.
I only found these from what seems to be a start-up but they are not available and it seems to be proprietary for only their IoT-Gateway and IoT-Platform.
Is there anything on the free market that I can buy, so I don't have to build my own sensors using an Arduino?
Or alternatively, what are the smallest possible sensors to build with integrated battery & bluetooth?
Alright. Am I right that those "all-in-one" sensors are just called "beacons" and therefor I didn't find them earlier?
And what is the difference between the iBeacon/Eddystone protocols and BLE? I don't get it anymore. And why are those things Beacons and not sensors?