diff --git a/.gitignore b/.gitignore
index cd531cf..9afeb92 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,3 +52,11 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+# Platformio
+.pio
+.pioenvs
+.piolibdeps
+
+# VSCode
+.vscode
+*.code-workspace
diff --git a/platformio.ini b/platformio.ini
index 7d1179d..71a2bb6 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,10 +9,11 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = attiny85
+default_envs = attiny84
 
 [env]
 build_flags = -D BUILD_ENV_NAME=$PIOENV
+lib_deps = LedControl, Encoder
 
 [env:attiny85]
 platform = atmelavr
@@ -21,6 +22,14 @@ framework = arduino
 upload_protocol = usbtiny
 board_build.f_cpu = 1000000L
 
+[env:attiny84]
+platform = atmelavr
+board = attiny84
+framework = arduino
+upload_protocol = usbtiny
+board_build.f_cpu = 800000L
+
+
 [env:uno]
 platform = atmelavr
 board = uno
diff --git a/src/pins.hpp b/src/pins.hpp
index cfa74ca..c49521e 100644
--- a/src/pins.hpp
+++ b/src/pins.hpp
@@ -1,18 +1,36 @@
 #ifndef __PINS_HPP__
-#define __PINS_HPP__
+	#define __PINS_HPP__
 
-/* MAX7219 */
-#define MAX_DATAIN		0
-#define MAX_CLK			2
-#define MAX_LOAD		1
+	#ifdef ARDUINO_AVR_ATTINYX5
+		/* MAX7219 */
+		#define MAX_DATAIN		0
+		#define MAX_CLK			2
+		#define MAX_LOAD		1
 
-/* Rotary Encoder */
-#define ENC_PINA		3
-#define ENC_PINB		4
+		/* Rotary Encoder */
+		#define ENC_PINA		3
+		#define ENC_PINB		4
 
 
-/* Button */
-#define BTN_ANALOGPIN	0
-#define BTN_VREF		4600
+		/* Button */
+		#define BTN_ANALOGPIN	0
+		#define BTN_VREF		4600
 
+	#else
+	#ifdef ARDUINO_AVR_ATTINYX4
+		/* MAX7219 */
+		#define MAX_DATAIN		7
+		#define MAX_CLK			9
+		#define MAX_LOAD		8
+
+		/* Rotary Encoder */
+		#define ENC_PINA		3
+		#define ENC_PINB		6
+
+
+		/* Button */
+		#define BTN_SET			2
+		#define BTN_RESET		5
+	#endif /* ARDUINO_AVR_ATTINYX4 */
+	#endif /* ARDUINO_AVR_ATTINYX5 */
 #endif /* __PINS_HPP__ */
diff --git a/src/rotary_encoder.hpp b/src/rotary_encoder.hpp
index c3e301f..8adb800 100644
--- a/src/rotary_encoder.hpp
+++ b/src/rotary_encoder.hpp
@@ -1,7 +1,7 @@
 #ifndef __ROTARYENCODER_HPP__
 #define __ROTARYENCODER_HPP__
 
-#include <encoder.h>
+#include <Encoder.h>
 
 #include "display.hpp"
 #include "pins.hpp"