diff --git a/src/drawing/color.rs b/src/drawing/color.rs
index a7e2354..1ee507d 100644
--- a/src/drawing/color.rs
+++ b/src/drawing/color.rs
@@ -29,9 +29,10 @@ impl Color {
     /// remember: 1 is white, 0 is black
     /// Color is the color you want to draw with in the foreground
     pub(crate) fn get_color(input: u8, pos: u8, color: &Color) -> Color {
-        match Color::is_drawable_pixel(input, pos) {
-            true    => Color::normal_color(color),
-            false   => Color::inverse_color(color)
+        if Color::is_drawable_pixel(input, pos) {
+            Color::normal_color(color)
+        } else {
+            Color::inverse_color(color)
         }
     }
 
@@ -65,9 +66,10 @@ impl Color {
         //      - black for pixel to draw
         //
         //foreground color is the color you want to have in the foreground
-        match Color::is_drawable_pixel(input, pos) {
-            true => Color::normal_color(foreground_color),
-            false => Color::inverse_color(foreground_color)
+        if Color::is_drawable_pixel(input, pos) {
+            Color::normal_color(foreground_color)
+        } else {
+            Color::inverse_color(foreground_color)
         }
     }
 }
\ No newline at end of file
diff --git a/src/drawing/mod.rs b/src/drawing/mod.rs
index 60487be..08763cd 100644
--- a/src/drawing/mod.rs
+++ b/src/drawing/mod.rs
@@ -141,7 +141,7 @@ impl<'a> Graphics<'a> {
         let mut counter = 0;
         for input_char in input.chars() {
             self.draw_char(x0 + counter, y0, input_char, font, color);
-            counter += font.get_char_width(input_char) as u16;
+            counter += u16::from(font.get_char_width(input_char));
         }
     }
 
@@ -163,7 +163,7 @@ impl<'a> Graphics<'a> {
             for _ in 0..8 {
 
                 self.draw_pixel( 
-                    x0 + width_counter as u16, 
+                    x0 + u16::from(width_counter), 
                     y0 + row_counter, 
                     &Color::get_color(elem, width_counter % 8, color));
 
@@ -183,9 +183,9 @@ impl<'a> Graphics<'a> {
     pub fn draw_char_8x8(&mut self, x0: u16, y0: u16, input: char, color: &Color) {
         let mut counter = 0;
         // includes special draw_char instructions as this one is ordered columnwise and not rowwise (first byte == first 8 pixel columnwise)
-        for &elem in font::bitmap_8x8(input).iter() {
+        for &elem in (&font::bitmap_8x8(input)).iter() {
             for i in 0..8u8 {
-                self.draw_pixel(x0 + counter, y0 + 7 - i as u16, &Color::convert_color(elem, i, color))
+                self.draw_pixel(x0 + counter, y0 + 7 - u16::from(i), &Color::convert_color(elem, i, color))
             }
             counter += 1;
         }
@@ -197,10 +197,8 @@ impl<'a> Graphics<'a> {
     /// 
     /// no autobreak line yet
     pub fn draw_string_8x8(&mut self, x0: u16, y0: u16, input: &str, color: &Color) {
-        let mut counter = 0;
-        for input_char in input.chars() {
-            self.draw_char_8x8(x0 + counter*8, y0, input_char, color);
-            counter += 1;
+        for (counter, input_char) in input.chars().enumerate() {
+            self.draw_char_8x8(x0 + counter as u16*8, y0, input_char, color);
         }
     }
 
diff --git a/src/epd1in54/mod.rs b/src/epd1in54/mod.rs
index 19b394a..45dc595 100644
--- a/src/epd1in54/mod.rs
+++ b/src/epd1in54/mod.rs
@@ -21,7 +21,7 @@
 
 const WIDTH: u16 = 200;
 const HEIGHT: u16 = 200;
-const DPI: u16 = 184;
+//const DPI: u16 = 184;
 const DEFAULT_BACKGROUND_COLOR: Color = Color::White;
 
 use hal::{
@@ -292,9 +292,9 @@ where
     }
 
     //TODO: assert length for LUT is exactly 30
-    fn set_lut_manual(&mut self, buffer: &[u8]) -> Result<(), E> {
-        self.set_lut_helper(buffer)
-    }
+    //fn set_lut_manual(&mut self, buffer: &[u8]) -> Result<(), E> {
+    //    self.set_lut_helper(buffer)
+    //}
 
 
     fn set_lut_helper(&mut self, buffer: &[u8]) -> Result<(), E> {
diff --git a/src/epd2in9/mod.rs b/src/epd2in9/mod.rs
index 646ba25..d6e74e4 100644
--- a/src/epd2in9/mod.rs
+++ b/src/epd2in9/mod.rs
@@ -295,9 +295,9 @@ where
     }
 
     //TODO: assert length for LUT is exactly 30
-    fn set_lut_manual(&mut self, buffer: &[u8]) -> Result<(), E> {
-        self.set_lut_helper(buffer)
-    }
+    //fn set_lut_manual(&mut self, buffer: &[u8]) -> Result<(), E> {
+    //    self.set_lut_helper(buffer)
+    //}
 
 
     fn set_lut_helper(&mut self, buffer: &[u8]) -> Result<(), E> {
diff --git a/src/type_a/command.rs b/src/type_a/command.rs
index f467a12..4adf5a7 100644
--- a/src/type_a/command.rs
+++ b/src/type_a/command.rs
@@ -8,7 +8,7 @@ use interface;
 /// Should rarely (never?) be needed directly.
 /// 
 /// For more infos about the addresses and what they are doing look into the pdfs 
-//#[allow(dead_code)]
+#[allow(dead_code)]
 #[allow(non_camel_case_types)]
 #[derive(Copy, Clone)]
 pub(crate) enum Command {