Hi @PopcornMonkey, definitely frustrating when your supported hardware's connection cuts out.
If it's a Bluetooth barcaode scanner, make sure you're using a supported device. (Square Register supports the Socket Mobile 7Ci.) Then, you may want to reset the scanner. Power it on, press and hold down the trigger button, press and hold down the power button, then after you hear three beeps, release both buttons. The scanner will un-pair and automatically power off. The next time you power on, it'll be discoverable and you can reconnect.
If it's a USB barcode scanner, and you're having trouble with the connection, make sure your Square Stand is firmly plugged into the accessories hub, and your hub is firmly plugged into a power adaptor. It may also help to unplug your devices from the accessories hub and plug them back in. (More troubleshooting tips here: http://squ.re/1IhhHS2.)
You'll also want to ensure you have the lastest version of iOS and the Square app installed.
Hope that helps. If you're still having trouble with the connection, we may need to escalate this to our Support team and have them dig in.
