How can a HID device be connected, but not paired?

I am using bluetoothctl to connect a Bluetooth HID device to a Raspberry Pi. I can get it to work, but I am quite confused by the terminology, and how it all fits together. When running scan on , and having the HID device in pairing mode, it finds the device and it also shows up in the devices list. As long as it is in the devices list, I can use info MAC to get some info on it. By default, it says Paired: no , Trusted: no , Connected: no . I have to do both trust MAC and pair MAC to have the device work as HID. Then, trying to keep it all working, I found this (IMHO) weird behaviour: when I s

Question by Bart Friederichs on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.