+ $ sigrok-cli --driver <somedriver>:conn=hid/cp2110 ...
+ $ sigrok-cli --driver <somedriver>:conn=bt/rfcomm/01-23-45-67-89-ab ...
+
+Formal syntax for serial communication:
+
+ - COM ports (RS232, USB CDC):
+ conn=<com-port>
+ - USB HID cables:
+ conn=hid[/<chip>]
+ conn=hid[/<chip>]/usb=<bus>.<dev>[.<if>]
+ conn=hid[/<chip>]/raw=<path>
+ conn=hid[/<chip>]/sn=<serno>
+ chip can be: ch9325, cp2110
+ path may contain slashes
+ path and serno are "greedy" (span to the end of the spec)
+ - Bluetooth Classic and Bluetooth Low Energy (BLE):
+ conn=bt/<conn>/<addr>
+ conn can be: rfcomm, ble122, nrf51, cc254x
+ addr can be "dense" or separated, bt/cc254x/0123456789ab or
+ bt/rfcomm/11-22-33-44-55-66 or bt/ble122/88:6b:12:34:56:78
+ (note that colons may not be available when the conn= spec is taken
+ from a string that separates fields by colon, e.g. in the "--driver
+ <name>:conn=<spec>" example, that is why the dense form and the use
+ of dashes for separation are supported)
+
+The following drivers/devices require a serial port specification. Some of
+the drivers implement a default for the connection. Some of the drivers
+can auto-detect USB connected devices.