Trolldemorted

Settings -> Linked Devices -> add a new one won't give you a QR code.

The QR codes are encoded tsdevice:// links which are presented by ready-to-mate slave devices.

If you want to link a signal-cli instance to an Android, you have to encode the cli's tsdevice link into an qrcode and scan it.

If you want to link an Android to a signal-cli instance, you have to use my fork. https://github.com/Trolldemorted/Signal-Android/tree/multide...