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-# tunnel challenge gedoe
+# tunnel challenge stuff
 
 HMI software stack:
 
-- UI d.m.v. webpagina in vanilla HTML/CSS/JS
-- Chromium in kiosk modus om de webpagina fullscreen te weergeven
-- websocat om de TCP socket verbinding om te zetten in een WebSocket
-- nginx om de webpagina te hosten
+- vanilla HTML/CSS/JS webpage as UI
+- display webpage fullscreen using Chromium in kiosk mode
+- use websocat to convert TCP socket connections to WebSocket
+- nginx for static hosting
+
+## bonus bits
+
+- mock WebSocket server
+  ```sh
+  websocat -s 8081
+  ```
+- mock TCP server
+  ```sh
+  socat stdio tcp-listen:8079
+  ```
+  or
+  ```sh
+  nc -lp 8079
+  ```
+  (both of these need `while :; do ... ; done` loops to keep them running
+  indefinitely)
+- forward TCP server to WebSocket
+  ```sh
+  websocat --text ws-listen:127.0.0.1:8081 tcp:127.0.0.1:8079
+  ```