conn=hid[/<chip>]/usb=<bus>.<dev>[.<if>]
conn=hid[/<chip>]/raw=<path>
conn=hid[/<chip>]/sn=<serno>
+ conn=hid[/<chip>]/iokit=<path>
chip can be: bu86x, ch9325, cp2110, victor
path may contain slashes
path and serno are "greedy" (span to the end of the spec)
'SI232 online' (28-29S) or 'SI232 store' (22-26x). The interface must
be configured to the same baud rate as the host (default 9600).
Multimeter and interface must be configured to the same address.
+ - GW Instek GDM-397: Press the "REL/RS232C (USB)" button for roughly 1 second.
- MASTECH MS6514: Press the "Setup/PC-Link" button for roughly 3 seconds.
- Metrix MX56C: Press the PRINT button to have the meter send acquisition
data via IR. Hold the PRINT button to adjust the meter's transmission
- UNI-T UT61B/C/D: Press the "REL/RS232/USB" button for roughly 1 second.
- UNI-T UT71x: Press the "SEND/-/MAXMIN" button for roughly 1 second.
Briefly pressing the "EXIT" button leaves this mode again.
+ - UNI-T UT181A: In the "SETUP" menu set "Communication" to "ON".
- UNI-T UT325: Briefly press the "SEND" button (as per manual). However, it
appears that in practice you don't have to press the button (at least on
some versions of the device), simply connect the device via USB.