Updated Developers notes (markdown)

Developers-notes.md

@@ -54,12 +54,23 @@ Since v4.12.0
  - The `XxxSource` class realizes the Source processor described in the device set general flow. It contains a NCO to adjust to the Tx plugin center frequency and a rational upsampler to adjust the sample rate at the input of the `UpChannelizer` (channel sample rate) to fit the exact rate required (source sample rate).
  - The generated baseband stream is also sent to the spectrum display.
 
-<h3>MIMO path (v5 only)</h3>
+<h3>MIMO path (since v6)</h3>
 
 Work in progress...
 
 ![SDRangel MIMO flow](./images/developer/SDRangelFlowMIMO.png)
 
+<h3>Device plugins development order</h3>
+
+Generally one would start from an existing plugin and adapt it. In any case developing from bottom to top will allow you to validate the code compilation progressively. Thus this is the recommended order for the main source files:
+  - start with the "...settings"
+  - do the "..thread(s)"
+  - do the Swagger `.yaml` file(s) and generate REST API code (you may as well do it after the "settings")
+  - do the static "web...adapter"
+  - do the "...input" or "...output" or "...mimo"
+  - do the "...gui" with the ".ui" XML form file from QtCreator
+  - end with the "...plugin" 
+
 <h3>Device sample source plugins</h3>
 
 At present the following plugins are available: