README.devices: add an UT-D04 on Windows section (libwdi and hidapi)

A user reported that the Windows driver which is assigned to the CH9325
based UT-D04 cable neither provides a genuine serial port nor shows up
in the sigrok enumeration which additionally uses HIDAPI. Mention that
assigning a different Windows driver can help in that case.

diff --git a/README.devices b/README.devices
index e527f0547ae7eb7811b66893a6a232298233ccc2..d2f4db8ca1bd973432e04456bc93e54e48fc5a27 100644 (file)
--- a/README.devices
+++ b/README.devices
@@ -403,6 +403,18 @@ See also: http://erste.de/UT61/index.html
   done
 
 
+UNI-T UT-D04 cable issue on Windows
+-----------------------------------
+
+There have been reports that CH9325 based cables are not detected on
+Windows out of the box when they are assigned to libwdi drivers. Though
+they may be usable in that case when the USB address is manually specified.
+This can happen when some "USB to serial" driver is assigned which does not
+provide a genuine COM port that enumerates naturally. Manually assigning a
+"USB input device" driver can improve HIDAPI compatibility and make the
+cable show up in sigrok's serial port enumeration.
+
+
 Enabling multimeter / data logger measurement output
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