Merge pull request #81 from BlueAndi/documentation

Updated README

Author: BlueAndi

README.md

@@ -84,7 +84,7 @@ Together with [Radon Ulzer](https://github.com/BlueAndi/RadonUlzer) it can be ru
 
 ## Installation
 1. Make sure that the hardware version of your [ZumoComSystem](https://github.com/NewTec-GmbH/ZumoComSystem) is supported. Currently, only v1.1 and v1.2 are supported.
-2. Install the [drivers](https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers?tab=downloads) for the CP2102 USB-UART converter if required.
+2. Install the [drivers](https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers?tab=downloads) for the CP2102 USB-UART converter if required. The "CP210x Universal Windows Driver" is recommended, as it enables the automatic bootloader mode.
 
 ## Build and flash procedure
 1. Build the firmware using the ```Build``` task in the "PlatformIO Project Tasks"