Added Binaries for Klipper firmware version v0.12.0-416 for both USB …

…and UART

Added Documentation for UART

documentation/Klipper/mods/uart_connection.md

@@ -0,0 +1,56 @@
+# UART Connection Pi => SKR Mini E3 V3
+So you want to keep more wires internal to the Baby Belt eh?
+Great news! It's SUPER Simple!
+
+Table o' Contents  
+- [Wiring](#wiring)
+- [Klipper Changes](#klipper-changes)
+- [Pi Changes](#pi-changes)
+
+## Wiring
+Grab yourself a pair of wires (I used 26 AWG) roughly around 16cm in length  
+and crimp both ends as Female Dupont connectors.
+(You can also use individual female to female jumper wires if you have them from a breadboard kit)  
+
+Next you will need to locate the pins in question and Remember that pins go to the opposite signal on either end of the cable.    
+RX => TX  
+TX => RX
+
+On a Raspberry Pi 3/4 you will be using pin 8 as TX and pin 10 as RX  
+and on the SKR Mini E3 V3, you will need to use two of the TFT pins (see diagram)  
+
+![Diagram of Raspberry Pi Connecting via UART to SKR Mini E3 V3](../../images/hardware_options/UART_Connection/oversized_uart_diagram.png)
+
+
+## Klipper changes
+* Instructions are specific to SKR Mini E3 V3 with regard to Flashing
+Klipper will need to be re-flashed to your board if it is already flashed. Be advised that you will use a microsd card that is formatted to fat32 and empty before we start
+next build your Klipper firmware   
+
+The Key difference here is we want to use Serial on USART2 PA3/PA2 for our communication interface (see below)
+![firmware menuconfig](../../images/hardware_options/UART_Connection/firmware_options.jpg)  
+
+You will also need to update your mcu section of your printer.cfg to use   
+```
+/dev/serial0
+```  
+as your serial connection to the board. If for some reason /dev/serial0 isn't working, you can try /dev/ttyAMA0 if that is still not working, see the following Raspberry Pi Changes to enable the serial interface  
+
+## Pi Changes
+Remember that raspi-config command? No? Ok well we need to ssh into our Pi and run the following  
+```
+sudo raspi-config
+```  
+** This WILL Prompt you for your password, it's safe to enter it here **   
+In this menu you will need to select option 3 Interface Options  
+![raspi-config serial enable 1](../../images/hardware_options/UART_Connection/raspi-config-1.png)  
+then I6 for Serial Port  
+![raspi-config serial enable 2](../../images/hardware_options/UART_Connection/raspi-config-2.png)
+You do not need to have the login shell accessible over serial
+![raspi-config serial enable 3](../../images/hardware_options/UART_Connection/raspi-config-3.png)
+you *DO* however want the serial interface to be enabled  
+![raspi-config serial enable 4](../../images/hardware_options/UART_Connection/raspi-config-4.png)
+press Ok on this confirmation screen, then press the right arrow twice to get to finish and press enter again to exit raspi-config
+![raspi-config serial enable 5](../../images/hardware_options/UART_Connection/raspi-config-5.png)
+it will ask if you want to reboot now, go ahead and say yes
+![raspi-config serial enable 6](../../images/hardware_options/UART_Connection/raspi-config-6.png)

documentation/Klipper/readme.md

@@ -1,6 +1,6 @@
 Good, Good... let the speed flow through you...
 
-This guide was written using the SKR mini E3 V3. For users flashing Klipper for the first time, please see the manufacturer's documentation [here](https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/blob/master/firmware/V3.0/Klipper/README.md)
+This guide was written using the SKR mini E3 V3. For users flashing Klipper for the fir | st time, please see the manufacturer's documentation [here](https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/blob/master/firmware/V3.0/Klipper/README.md)
 Additionally, it is recommended to use a pre-built Klipper image to have many of the Klipper related items preinstalled and preconfigured for you. We don't judge if you use Fluidd or Mainsail either 😉
 
 # Where did you get your kit? / Which Kit do you have?
@@ -9,3 +9,7 @@ Additionally, it is recommended to use a pre-built Klipper image to have many of
 |:------------|:-------------------------------------------------------------------------------------:|
 | [![Self Sourced](../images/kit_sources/oshw-logo-outline.svg)](./kits/self-sourced/readme.md) | [![Fabreeko](../images/kit_sources/fabreeko_text_sm.webp)](./kits/fabreeko/readme.md) |
 
+# Pre Built Firmware Images  
+| Board          | Klipper Version | USB  | Serial |
+|:---------------|:---------------:|:----:|:------:|
+| SKR Mini E3 V3 | v0.12.0-416 | [klipper_USB.bin](../../Software/Firmware/klipper/binary/SKR%20Mini%20E3%20V3/klipper_USB.bin) | [klipper_uart_PA3_PA2_250000_baud.bin](../../Software/Firmware/klipper/binary/SKR%20Mini%20E3%20V3/klipper_uart_PA3_PA2_250000_baud.bin) |