Update README.md

README.md

@@ -1,10 +1,17 @@
 # MKS-TFT
-MKS TFT32/28 alternative firmware
+MKS TFT32/28 alternative firmware.
+
+![Testing](testing.jpg)
 
 ## Current status
-almost finished hardware support, logic is not implemented yet
+Early alpha, most of functions seem to be working. Printing from USB stick and on-screen SD card is not complete.
+
+## Connecting MKS TFT to Duet board
+
+Since Duet has no protection from over-voltage and MKS TFT has 5v UART do not connect MKS TFT directly to the Duet board. Use level shifter (Duet 3.3v <-> MKS TFT 5v):
+[Adafruit level shifters](https://www.adafruit.com/category/864)
 
-## Connecting ST-LINK v2 to the board: 
+## Connecting ST-LINK v2 to the MKS TFT: 
 
     ST-LINK    MKS-TFT32: 
     5v         AUX-1 5v