Update Docs

docs/guide/what-is-doorman.md

@@ -5,11 +5,13 @@
 Doorman lets you connect your TCS or Koch intercom to any home automation system.
 There are also some rebranded Niko intercoms which are counterparts of the TCS and Koch ones.
 
-However it's not limited to these intercoms only. With the integrated solid state relay you can easily simulate a button press to trigger the door opener or the light (up to 40V, max 2.5A).
+### What about other intercoms?
+Doorman isn't neccessarily limited to these intercoms only.\
+You can easily simulate a button press to trigger a door opener or the light with the integrated solid state relay (up to 40V, max 2.5A).
 
 If your intercom is not a TCS or Koch one but operates on a 2-wire bus within the 14-24V DC range it might be possible to implement other protocols as well.
 
-You can also monitor the voltage level on older intercoms (14-24V DC) with the internal ADC and trigger specific actions based on it.
+You can [monitor the voltage level](../firmware/stock-firmware#advanced-examples) on older intercoms (14-24V DC) with the internal ADC as well and trigger specific actions based on it.
 
 <div class="tip custom-block" style="padding-top: 8px">
 
@@ -23,12 +25,13 @@ You just received your Doorman? Skip to the [Quickstart](./getting-started).
 - USB-C port for easy flashing (and because USB-C is cool 😎)
 - It's super small and fits almost everywhere
 - Configurable WS2812B RGB LED to indicate specific events
-- 2 additional GPIO via Screw Terminal for easy expansion with your own sensors and devices
-- 1 solid state relay via Screw Terminal to switch up to 40V (max. 2.5A) for oldschool intercom systems
-- 1 External Button via Screw Terminal (G + BTN)
+- 2 additional GPIO for easy expansion with your own sensors and devices
+- 1 solid state relay to switch up to 40V (max. 2.5A) for oldschool intercom systems
+- 1 External Button (G + BTN)
 - Bridge Rectifier for the Bus-wire input to correct polarity
 - TCS Bus Communication (e.g. Open the front door, Detect Doorbell)
-- You can use your Doorman as a Nuki Bridge with the [Nuki Bridge Firmware](../firmware/nuki-bridge-firmware). It is incompatible with the Nuki App, Bluetooth LE only.
+- You can use your Doorman as a Nuki Bridge with the [Nuki Bridge Firmware](../firmware/nuki-bridge-firmware).\
+  It is incompatible with the Nuki App but you can use the Home Assistant App.
 
 ## Interested in buying one?