Updated Troubleshooting (mediawiki)

Troubleshooting.mediawiki

@@ -23,6 +23,11 @@ Non USB-to-Serial devices like mass-storage, mouse, GPC receivers, ... and rarel
 A common issue is wrong baud rate.
 
 
+== Baud rate <code>12345</code> does not work ==
+
+Not all drivers / devices support non-standard baud rates. See [[Troubleshooting#Feature Matrix|Feature Matrix]] for details.
+
+
 == I am using an Arduino Uno, Sparkfun Pro Micro, or other Arduino and <code>if (Serial)</code> doesn't work. ==
 
 Most Arduinos with CDC driver use the DTR line to determine serial channel readiness.  In your Android code, call <code>setDTR(true);</code>
@@ -106,3 +111,48 @@ Waiting for write completion is typically done with application specific protoco
 == Does this library work with Ionic/Cordova/Xamarin/App Inventor/... development framework? ==
 
 If your framework can import Java .jar files, look [[Build-Variants#Jar|here]] for instructions about creating a .jar file. 
+
+
+== Feature Matrix ==
+
+
+Basic Features are supported by all drivers / devices
+
+{|
+! Method / Feature !! Supported
+|-
+| <code>open</code>, <code>close</code> || 🟢 
+|-
+| <code>setParameters</code> || 🟢 
+|-
+| <code>read</code>, <code>write</code> || 🟢 
+|-
+| event based read with <code>SerialInputOutputManager</code> || 🟢 
+|}
+
+Some Features are not supported by all drivers / devices
+
+{|
+! Feature !! FTDI !! CH34x !! CP210x !! PL2303 !! CDC
+|-
+| <code>setParameters</code> with non-standard baud rates || 🟢 || 🟢 || 🟢 for CP2105 <br> 🔴 for CP2102. fallback to unknown baud rate without exception || 🔴 fallback to 9600 baud without exception || 🟢 
+|-
+| set/get flow control lines RTS, CTS, DTR, DSR, CD, RI || 🟢 || 🟢 || 🟢 || 🟢 || 🟡 only input lines RTS, DTR
+|-
+| <code>purgeHwBuffers</code> || 🟢 || 🔴 || 🟢 || 🟢 || 🟢
+|-
+| multi port devices || 🟢 || n.a. || 🟢 ||n.a. || 🟢
+|-
+| device specific methods || <code>get/setLatencyTimer</code> || - || - || - || -
+|}
+
+
+Some Features are not implemented (yet)
+
+{|
+! Feature !! Supported
+|-
+| break (send break signal) || 🔴 
+|-
+| flow control (RTS/CTS or DTS/DTR or XON/XOFF based flow control) || 🔴 
+|}