diff --git a/Examples/SwiftIOPlayground/08LCD/AccelerationVisualizer/Sources/main.swift b/Examples/SwiftIOPlayground/08LCD/AccelerationVisualizer/Sources/main.swift
index 9ecc874..191a66c 100644
--- a/Examples/SwiftIOPlayground/08LCD/AccelerationVisualizer/Sources/main.swift
+++ b/Examples/SwiftIOPlayground/08LCD/AccelerationVisualizer/Sources/main.swift
@@ -7,11 +7,11 @@ import ST7789
 
 
 // Initialize the SPI pin and the digital pins for the LCD.
-let spi = SPI(Id.SPI0, speed: 30_000_000)
-let cs = DigitalOut(Id.D5)
-let dc = DigitalOut(Id.D4)
-let rst = DigitalOut(Id.D3)
 let bl = DigitalOut(Id.D2)
+let rst = DigitalOut(Id.D12)
+let dc = DigitalOut(Id.D13)
+let cs = DigitalOut(Id.D5)
+let spi = SPI(Id.SPI0, speed: 30_000_000)
 // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
 let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
 
diff --git a/Examples/SwiftIOPlayground/08LCD/AnalogVisualizer/Sources/main.swift b/Examples/SwiftIOPlayground/08LCD/AnalogVisualizer/Sources/main.swift
index 49ac9e5..6e85318 100644
--- a/Examples/SwiftIOPlayground/08LCD/AnalogVisualizer/Sources/main.swift
+++ b/Examples/SwiftIOPlayground/08LCD/AnalogVisualizer/Sources/main.swift
@@ -7,11 +7,11 @@ import ST7789
 
 
 // Initialize the SPI pin and the digital pins for the LCD.
-let spi = SPI(Id.SPI0, speed: 30_000_000)
-let cs = DigitalOut(Id.D5)
-let dc = DigitalOut(Id.D4)
-let rst = DigitalOut(Id.D3)
 let bl = DigitalOut(Id.D2)
+let rst = DigitalOut(Id.D12)
+let dc = DigitalOut(Id.D13)
+let cs = DigitalOut(Id.D5)
+let spi = SPI(Id.SPI0, speed: 30_000_000)
 
 // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
 let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
diff --git a/Examples/SwiftIOPlayground/08LCD/LCD/Sources/main.swift b/Examples/SwiftIOPlayground/08LCD/LCD/Sources/main.swift
index 49b5ed9..3c6db78 100644
--- a/Examples/SwiftIOPlayground/08LCD/LCD/Sources/main.swift
+++ b/Examples/SwiftIOPlayground/08LCD/LCD/Sources/main.swift
@@ -6,21 +6,21 @@ import ST7789
 
 
 // Initialize the SPI pin and the digital pins for the LCD.
-let spi = SPI(Id.SPI0, speed: 30_000_000)
-let cs = DigitalOut(Id.D5)
-let dc = DigitalOut(Id.D4)
-let rst = DigitalOut(Id.D3)
 let bl = DigitalOut(Id.D2)
+let rst = DigitalOut(Id.D12)
+let dc = DigitalOut(Id.D13)
+let cs = DigitalOut(Id.D5)
+let spi = SPI(Id.SPI0, speed: 30_000_000)
 
 // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
 let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
 
 // Store some color values for easier reference later.
-let black: UInt16 = 0x0000
-let red: UInt16 = 0xF800
-let green: UInt16 = 0x07E0
-let blue: UInt16 = 0x001F
-let white: UInt16 = 0xFFFF
+let black = UInt16(0x0000).byteSwapped
+let red   = UInt16(0xF800).byteSwapped
+let green = UInt16(0x07E0).byteSwapped
+let blue = UInt16(0x001F).byteSwapped
+let white = UInt16(0xFFFF).byteSwapped
 
 // Fill the whole screen with red, green, blue, white, and black in turns. 
 // The color changes every second. 
diff --git a/Examples/SwiftIOPlayground/08LCD/Rainbow/Sources/main.swift b/Examples/SwiftIOPlayground/08LCD/Rainbow/Sources/main.swift
index 759fc56..ece9323 100644
--- a/Examples/SwiftIOPlayground/08LCD/Rainbow/Sources/main.swift
+++ b/Examples/SwiftIOPlayground/08LCD/Rainbow/Sources/main.swift
@@ -6,11 +6,11 @@ import ST7789
 
 
 // Initialize the SPI pin and the digital pins for the LCD.
-let spi = SPI(Id.SPI0, speed: 30_000_000)
-let cs = DigitalOut(Id.D5)
-let dc = DigitalOut(Id.D4)
-let rst = DigitalOut(Id.D3)
 let bl = DigitalOut(Id.D2)
+let rst = DigitalOut(Id.D12)
+let dc = DigitalOut(Id.D13)
+let cs = DigitalOut(Id.D5)
+let spi = SPI(Id.SPI0, speed: 30_000_000)
 
 // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
 let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
@@ -24,7 +24,7 @@ let indigo: UInt32 = 0x4B0082
 let violet: UInt32 = 0x9400D3
 let colors888 = [red, orange, yellow, green, blue, indigo, violet]
 // Get 16bit color data.
-let colors565: [UInt16] = colors888.map { getRGB565LE($0) }
+let colors565: [UInt16] = colors888.map { getRGB565BE($0) }
 
 // The width for each color bar.
 let width = screen.width / colors565.count
@@ -46,6 +46,6 @@ while true {
 
 // The screen needs RGB565 color data, so change color data from UInt32 to UInt16.
 // Besides, the board uses little endian format, so the bytes are swapped.
-func getRGB565LE(_ color: UInt32) -> UInt16 {
+func getRGB565BE(_ color: UInt32) -> UInt16 {
     return UInt16(((color & 0xF80000) >> 8) | ((color & 0xFC00) >> 5) | ((color & 0xF8) >> 3)).byteSwapped
 }
\ No newline at end of file
diff --git a/Examples/SwiftIOPlayground/08LCD/ScrollEffect/Sources/main.swift b/Examples/SwiftIOPlayground/08LCD/ScrollEffect/Sources/main.swift
index 44282cb..0de2c9e 100644
--- a/Examples/SwiftIOPlayground/08LCD/ScrollEffect/Sources/main.swift
+++ b/Examples/SwiftIOPlayground/08LCD/ScrollEffect/Sources/main.swift
@@ -5,11 +5,11 @@ import ST7789
 
 
 // Initialize the SPI pin and the digital pins for the LCD.
-let spi = SPI(Id.SPI0, speed: 30_000_000)
-let cs = DigitalOut(Id.D5)
-let dc = DigitalOut(Id.D4)
-let rst = DigitalOut(Id.D3)
 let bl = DigitalOut(Id.D2)
+let rst = DigitalOut(Id.D12)
+let dc = DigitalOut(Id.D13)
+let cs = DigitalOut(Id.D5)
+let spi = SPI(Id.SPI0, speed: 30_000_000)
 
 // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
 let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
@@ -23,7 +23,7 @@ let indigo: UInt32 = 0x4B0082
 let violet: UInt32 = 0x9400D3
 let colors888 = [red, orange, yellow, green, blue, indigo, violet]
 // Get 16bit color data.
-let colors565: [UInt16] = colors888.map { getRGB565LE($0) }
+let colors565: [UInt16] = colors888.map { getRGB565BE($0) }
 
 let scrollStep = 5
 var buffer = [UInt16](repeating: 0, count: scrollStep * screen.height)
@@ -49,6 +49,6 @@ while true {
 
 // The screen needs RGB565 color data, so change color data from UInt32 to UInt16.
 // Besides, the board uses little endian format, so the bytes are swapped.
-func getRGB565LE(_ color: UInt32) -> UInt16 {
+func getRGB565BE(_ color: UInt32) -> UInt16 {
     return UInt16(((color & 0xF80000) >> 8) | ((color & 0xFC00) >> 5) | ((color & 0xF8) >> 3)).byteSwapped
 }
\ No newline at end of file
diff --git a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Mario.swift b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Mario.swift
similarity index 100%
rename from Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Mario.swift
rename to Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Mario.swift
diff --git a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/MusicPlayer.swift b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/MusicPlayer.swift
deleted file mode 100644
index 1d351a3..0000000
--- a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/MusicPlayer.swift
+++ /dev/null
@@ -1,27 +0,0 @@
-// Play a song using a speaker.
-import SwiftIO
-import MadBoard
-
-@main
-public struct MusicPlayer {
-    public static func main() {
-        // The sample rate of I2SOut and Player should be the same.
-        // Note: the speaker needs stereo channel but only uses the samples of left channel. 
-        // And the frequencies below 200Hz may sound a little fuzzy with this speaker.
-        let speaker = I2S(Id.I2S0, rate: 16_000)
-
-        // BPM is beat count per minute. 
-        // Timer signature specifies beats per bar and note value of a beat.
-        let player = Player(speaker, sampleRate: 16_000)
-
-        player.bpm = Mario.bpm
-        player.timeSignature = Mario.timeSignature
-
-        // Play the music using the tracks.
-        player.playTracks(Mario.tracks, waveforms: Mario.trackWaveforms, amplitudeRatios: Mario.amplitudeRatios)
-
-        while true {
-            sleep(ms: 1000)
-        }
-    }
-}
diff --git a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Note.swift b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Note.swift
similarity index 100%
rename from Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Note.swift
rename to Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Note.swift
diff --git a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Player.swift b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Player.swift
similarity index 100%
rename from Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/MusicPlayer/Player.swift
rename to Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/Player.swift
diff --git a/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/main.swift b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/main.swift
new file mode 100644
index 0000000..38b3b53
--- /dev/null
+++ b/Examples/SwiftIOPlayground/09Speaker/MusicPlayer/Sources/main.swift
@@ -0,0 +1,23 @@
+// Play a song using a speaker.
+import SwiftIO
+import MadBoard
+
+
+// The sample rate of I2SOut and Player should be the same.
+// Note: the speaker needs stereo channel but only uses the samples of left channel. 
+// And the frequencies below 200Hz may sound a little fuzzy with this speaker.
+let speaker = I2S(Id.I2S0, rate: 16_000)
+
+// BPM is beat count per minute. 
+// Timer signature specifies beats per bar and note value of a beat.
+let player = Player(speaker, sampleRate: 16_000)
+
+player.bpm = Mario.bpm
+player.timeSignature = Mario.timeSignature
+
+// Play the music using the tracks.
+player.playTracks(Mario.tracks, waveforms: Mario.trackWaveforms, amplitudeRatios: Mario.amplitudeRatios)
+
+while true {
+    sleep(ms: 1000)
+}
diff --git a/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/Speaker/Speaker.swift b/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/Speaker/Speaker.swift
deleted file mode 100644
index 34cc45d..0000000
--- a/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/Speaker/Speaker.swift
+++ /dev/null
@@ -1,106 +0,0 @@
-// Import the SwiftIO library to control input and output.
-import SwiftIO
-// Import the MadBoard to use the id of the pins.
-import MadBoard
-
-@main
-public struct Speaker {
-    public static func main() {
-        // Initialize the speaker using I2S communication. 
-        // The default setting is 16k sample rate, 16bit sample bits.
-        let speaker = I2S(Id.I2S0)
-
-        // The frequencies of note C to B in octave 4.
-        let frequency: [Float] = [
-            261.626,
-            293.665,
-            329.628,
-            349.228,
-            391.995,
-            440.000,
-            493.883
-        ]
-
-        // Set the samples of the waveforms.
-        let sampleRate = 16_000
-        let rawSampleLength = 1000
-        var rawSamples = [Int16](repeating: 0, count: rawSampleLength)
-        var amplitude: Int16 = 10_000
-
-        while true {
-
-            let duration: Float = 1.0
-
-            // Iterate through the frequencies from C to B to play a scale. 
-            // The sound waveform is a square wave, so you will hear a buzzing sound.
-            generateSquare(amplitude: amplitude, &rawSamples)
-            for f in frequency {
-                playWave(samples: rawSamples, frequency: f, duration: duration)
-            } 
-            sleep(ms: 1000)
-
-            // Iterate through the frequencies from C to B to play a scale.
-            // The sound waveform is a triangle wave, and the sound is much softer.
-            generateTriangle(amplitude: amplitude, &rawSamples)
-            for f in frequency {
-                playWave(samples: rawSamples, frequency: f, duration: duration)
-            } 
-            sleep(ms: 1000)
-
-            // Decrease the amplitude to lower the sound.
-            // If it's smaller than zero, it restarts from 20000.
-            amplitude -= 1000
-            if amplitude <= 0 {
-                amplitude = 10_000
-            }
-        }
-
-        // Generate samples for a square wave with a specified amplitude and store them in an array.
-        func generateSquare(amplitude: Int16, _ samples: inout [Int16]) {
-            let count = samples.count
-            for i in 0..<count / 2 {
-                samples[i] = -amplitude
-            }
-            for i in count / 2..<count {
-                samples[i] = amplitude
-            }
-        }
-
-        // Generate samples for a triangle wave with a specified amplitude and store the them in an array.
-        func generateTriangle(amplitude: Int16, _ samples: inout [Int16]) {
-            let count = samples.count
-
-            let step = Float(amplitude) / Float(count / 2)
-            for i in 0..<count / 4 {
-                samples[i] = Int16(step * Float(i))
-            }
-            for i in count / 4..<count / 4 * 3 {
-                samples[i] = amplitude - Int16(step * Float(i))
-            }
-            for i in count / 4 * 3..<count {
-                samples[i] = -amplitude + Int16(step * Float(i))
-            }
-        }
-
-        // Send the samples over I2s bus and play the note with a specified frequency and duration.
-        func playWave(samples: [Int16], frequency: Float, duration: Float) {
-            let playCount = Int(duration * Float(sampleRate))
-            var data = [Int16](repeating: 0, count: playCount)
-
-            let step: Float = frequency * Float(samples.count) / Float(sampleRate)
-
-            var volume: Float = 1.0
-            let volumeStep = 1.0 / Float(playCount)
-
-            for i in 0..<playCount {
-                let pos = Int(Float(i) * step) % samples.count 
-                data[i] = Int16(Float(samples[pos]) * volume)
-                volume -= volumeStep
-            }
-            data.withUnsafeBytes { ptr in
-                let u8Array = ptr.bindMemory(to: UInt8.self)
-                speaker.write(Array(u8Array))
-            }
-        }
-    }
-}
diff --git a/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/main.swift b/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/main.swift
new file mode 100644
index 0000000..a262974
--- /dev/null
+++ b/Examples/SwiftIOPlayground/09Speaker/Speaker/Sources/main.swift
@@ -0,0 +1,102 @@
+// Import the SwiftIO library to control input and output.
+import SwiftIO
+// Import the MadBoard to use the id of the pins.
+import MadBoard
+
+
+// Initialize the speaker using I2S communication. 
+// The default setting is 16k sample rate, 16bit sample bits.
+let speaker = I2S(Id.I2S0)
+
+// The frequencies of note C to B in octave 4.
+let frequency: [Float] = [
+    261.626,
+    293.665,
+    329.628,
+    349.228,
+    391.995,
+    440.000,
+    493.883
+]
+
+// Set the samples of the waveforms.
+let sampleRate = 16_000
+let rawSampleLength = 1000
+var rawSamples = [Int16](repeating: 0, count: rawSampleLength)
+var amplitude: Int16 = 10_000
+
+while true {
+
+    let duration: Float = 1.0
+
+    // Iterate through the frequencies from C to B to play a scale. 
+    // The sound waveform is a square wave, so you will hear a buzzing sound.
+    generateSquare(amplitude: amplitude, &rawSamples)
+    for f in frequency {
+        playWave(samples: rawSamples, frequency: f, duration: duration)
+    } 
+    sleep(ms: 1000)
+
+    // Iterate through the frequencies from C to B to play a scale.
+    // The sound waveform is a triangle wave, and the sound is much softer.
+    generateTriangle(amplitude: amplitude, &rawSamples)
+    for f in frequency {
+        playWave(samples: rawSamples, frequency: f, duration: duration)
+    } 
+    sleep(ms: 1000)
+
+    // Decrease the amplitude to lower the sound.
+    // If it's smaller than zero, it restarts from 20000.
+    amplitude -= 1000
+    if amplitude <= 0 {
+        amplitude = 10_000
+    }
+}
+
+// Generate samples for a square wave with a specified amplitude and store them in an array.
+func generateSquare(amplitude: Int16, _ samples: inout [Int16]) {
+    let count = samples.count
+    for i in 0..<count / 2 {
+        samples[i] = -amplitude
+    }
+    for i in count / 2..<count {
+        samples[i] = amplitude
+    }
+}
+
+// Generate samples for a triangle wave with a specified amplitude and store the them in an array.
+func generateTriangle(amplitude: Int16, _ samples: inout [Int16]) {
+    let count = samples.count
+
+    let step = Float(amplitude) / Float(count / 2)
+    for i in 0..<count / 4 {
+        samples[i] = Int16(step * Float(i))
+    }
+    for i in count / 4..<count / 4 * 3 {
+        samples[i] = amplitude - Int16(step * Float(i))
+    }
+    for i in count / 4 * 3..<count {
+        samples[i] = -amplitude + Int16(step * Float(i))
+    }
+}
+
+// Send the samples over I2s bus and play the note with a specified frequency and duration.
+func playWave(samples: [Int16], frequency: Float, duration: Float) {
+    let playCount = Int(duration * Float(sampleRate))
+    var data = [Int16](repeating: 0, count: playCount)
+
+    let step: Float = frequency * Float(samples.count) / Float(sampleRate)
+
+    var volume: Float = 1.0
+    let volumeStep = 1.0 / Float(playCount)
+
+    for i in 0..<playCount {
+        let pos = Int(Float(i) * step) % samples.count 
+        data[i] = Int16(Float(samples[pos]) * volume)
+        volume -= volumeStep
+    }
+    data.withUnsafeBytes { ptr in
+        let u8Array = ptr.bindMemory(to: UInt8.self)
+        speaker.write(Array(u8Array))
+    }
+}
diff --git a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/Button/Button.swift b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/Button/Button.swift
deleted file mode 100644
index ae0c944..0000000
--- a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/Button/Button.swift
+++ /dev/null
@@ -1,34 +0,0 @@
-// This code is downloaded to board connected to a button.
-// Detect if the button is pressed/released and send message to another board via UART bus.
-// Connect UART0 (RX/TX) of this board to the UART0 (TX/RX) of the other board.
-
-import SwiftIO
-import MadBoard
-
-@main
-public struct Button {
-    public static func main() {
-        let uart = UART(Id.UART0)
-        let button = DigitalIn(Id.D1)
-
-        var buttonPressed = false
-
-        while true {
-            let pressingButton = button.read()
-
-            // If button is pressed, send message to turn on LED connected to another board.
-            if pressingButton && !buttonPressed {
-                uart.write("on")
-                buttonPressed = true
-            }
-
-            // If button is released, send message to turn off LED connected to another board.
-            if buttonPressed && !pressingButton {
-                uart.write("off")
-                buttonPressed = false
-            }
-
-            sleep(ms: 5)
-        }
-    }
-}
diff --git a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/main.swift b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/main.swift
new file mode 100644
index 0000000..756a412
--- /dev/null
+++ b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/Button/Sources/main.swift
@@ -0,0 +1,35 @@
+// This code is downloaded to board connected to a button.
+// Detect if the button is pressed/released and send message to another board via UART bus.
+// Connect UART0 (RX/TX) of this board to the UART0 (TX/RX) of the other board.
+
+import SwiftIO
+import MadBoard
+
+
+let uart = UART(Id.UART0)
+
+#if SWIFTIOMICRO
+let button = DigitalIn(Id.DL)
+#else
+let button = DigitalIn(Id.D0)
+#endif
+
+var buttonPressed = false
+
+while true {
+    let pressingButton = button.read()
+
+    // If button is pressed, send message to turn on LED connected to another board.
+    if pressingButton && !buttonPressed {
+        uart.write("on")
+        buttonPressed = true
+    }
+
+    // If button is released, send message to turn off LED connected to another board.
+    if buttonPressed && !pressingButton {
+        uart.write("off")
+        buttonPressed = false
+    }
+
+    sleep(ms: 5)
+}
diff --git a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/LED/LED.swift b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/LED/LED.swift
deleted file mode 100644
index bcabd9c..0000000
--- a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/LED/LED.swift
+++ /dev/null
@@ -1,46 +0,0 @@
-// This code is downloaded to board connected to an LED.
-// Wait UART data from other board to turn on/off LED.
-// Connect UART0 (RX/TX) of this board to the UART0 (TX/RX) of the other board.
-
-import SwiftIO
-import MadBoard
-
-@main
-public struct LED {
-    public static func main() {
-        let uart = UART(Id.UART0)
-        let led = DigitalOut(Id.D18)
-
-        var buffer: [UInt8] = []
-
-        while true {
-            // Receive all data from another board via UART bus.
-            while uart.checkBufferReceived() > 0 {
-                var byte: UInt8 = 0
-                uart.read(into: &byte)
-                buffer.append(byte)
-                sleep(ms: 1)
-            }
-
-            // Match the message and change the LED state.
-            if buffer.count > 0 {
-                // The message from another board is sent in cString 
-                // which means the last data is 0, so you need to convert
-                // the data in buffer to string using the given encoding. 
-                let command = String(cString: buffer)
-                
-                buffer.removeAll()
-
-                switch command {
-                case "on": 
-                    led.high()
-                case "off": 
-                    led.low()
-                default: break
-                }
-            }
-            
-            sleep(ms: 10)
-        }
-    }
-}
\ No newline at end of file
diff --git a/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/main.swift b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/main.swift
new file mode 100644
index 0000000..0cfa1ff
--- /dev/null
+++ b/Examples/SwiftIOPlayground/10UART/RemoteLEDSwitch/LED/Sources/main.swift
@@ -0,0 +1,42 @@
+// This code is downloaded to board connected to an LED.
+// Wait UART data from other board to turn on/off LED.
+// Connect UART0 (RX/TX) of this board to the UART0 (TX/RX) of the other board.
+
+import SwiftIO
+import MadBoard
+
+
+let uart = UART(Id.UART0)
+let led = DigitalOut(Id.BLUE)
+
+var buffer: [UInt8] = []
+
+while true {
+    // Receive all data from another board via UART bus.
+    while uart.checkBufferReceived() > 0 {
+        var byte: UInt8 = 0
+        uart.read(into: &byte)
+        buffer.append(byte)
+        sleep(ms: 1)
+    }
+
+    // Match the message and change the LED state.
+    if buffer.count > 0 {
+        // The message from another board is sent in cString 
+        // which means the last data is 0, so you need to convert
+        // the data in buffer to string using the given encoding. 
+        let command = String(cString: buffer)
+        
+        buffer.removeAll()
+
+        switch command {
+        case "on": 
+            led.high()
+        case "off": 
+            led.low()
+        default: break
+        }
+    }
+    
+    sleep(ms: 10)
+}
\ No newline at end of file
diff --git a/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/SerialEcho/SerialEcho.swift b/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/SerialEcho/SerialEcho.swift
deleted file mode 100644
index 621b261..0000000
--- a/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/SerialEcho/SerialEcho.swift
+++ /dev/null
@@ -1,30 +0,0 @@
-// Send message from computer to USB-Serial converter using serial monitor. 
-// Then send the message back using UART.
-import SwiftIO
-import MadBoard
-
-@main
-public struct SerialEcho {
-    public static func main() {
-        let uart = UART(Id.UART0)
-
-        var message = [UInt8](repeating: 0, count: 100)
-
-        while true {
-            // Check if there is available data in the UART buffer.
-            let count = uart.checkBufferReceived()
-
-            if count > 0 {
-                for i in message.indices {
-                    message[i] = 0
-                }
-                // Read data from the buffer.
-                uart.read(into: &message, count: count)
-                // Send the message back. 
-                uart.write(Array(message[0..<count]))
-            }
-            
-            sleep(ms: 10)
-        }
-    }
-}
diff --git a/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/main.swift b/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/main.swift
new file mode 100644
index 0000000..522e986
--- /dev/null
+++ b/Examples/SwiftIOPlayground/10UART/SerialEcho/Sources/main.swift
@@ -0,0 +1,26 @@
+// Send message from computer to USB-Serial converter using serial monitor. 
+// Then send the message back using UART.
+import SwiftIO
+import MadBoard
+
+
+let uart = UART(Id.UART0)
+
+var message = [UInt8](repeating: 0, count: 100)
+
+while true {
+    // Check if there is available data in the UART buffer.
+    let count = uart.checkBufferReceived()
+
+    if count > 0 {
+        for i in message.indices {
+            message[i] = 0
+        }
+        // Read data from the buffer.
+        uart.read(into: &message, count: count)
+        // Send the message back. 
+        uart.write(Array(message[0..<count]))
+    }
+    
+    sleep(ms: 10)
+}
diff --git a/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/SerialLEDSwitch/SerialLEDSwitch.swift b/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/SerialLEDSwitch/SerialLEDSwitch.swift
deleted file mode 100644
index 955eec1..0000000
--- a/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/SerialLEDSwitch/SerialLEDSwitch.swift
+++ /dev/null
@@ -1,39 +0,0 @@
-// Connect the USB-Serial converter module to your computer 
-// and choose the port in serial monitor.
-// Send message (1/0) from computer to turn on/off the LED.
-
-import SwiftIO
-import MadBoard
-
-@main
-public struct SerialLEDSwitch {
-    public static func main() {
-        let uart = UART(Id.UART0)
-        let led = DigitalOut(Id.D18)
-
-        while true {
-            // Check if there is any message from computer.
-            let count = uart.checkBufferReceived()
-            
-            if count > 0 {
-                // Read data from UART buffer.
-                var buffer = [UInt8](repeating: 0, count: count)
-                uart.read(into: &buffer)
-                
-                // Decode the data since the text from computer is sent in UTF8 format.
-                let command = String(decoding: buffer, as: UTF8.self)
-                // Connect the port on your micro board in serial monitor to see printed message
-                print(command)
-                
-                // Set digital output according to the command from computer.
-                switch command  {
-                case "0": led.low()
-                case "1": led.high()
-                default: break
-                }
-            }
-            
-            sleep(ms: 10)
-        }
-    }
-}
diff --git a/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/main.swift b/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/main.swift
new file mode 100644
index 0000000..c92ea99
--- /dev/null
+++ b/Examples/SwiftIOPlayground/10UART/SerialLEDSwitch/Sources/main.swift
@@ -0,0 +1,35 @@
+// Connect the USB-Serial converter module to your computer 
+// and choose the port in serial monitor.
+// Send message (1/0) from computer to turn on/off the LED.
+
+import SwiftIO
+import MadBoard
+
+
+let uart = UART(Id.UART0)
+let led = DigitalOut(Id.D18)
+
+while true {
+    // Check if there is any message from computer.
+    let count = uart.checkBufferReceived()
+    
+    if count > 0 {
+        // Read data from UART buffer.
+        var buffer = [UInt8](repeating: 0, count: count)
+        uart.read(into: &buffer)
+        
+        // Decode the data since the text from computer is sent in UTF8 format.
+        let command = String(decoding: buffer, as: UTF8.self)
+        // Connect the port on your micro board in serial monitor to see printed message
+        print(command)
+        
+        // Set digital output according to the command from computer.
+        switch command  {
+        case "0": led.low()
+        case "1": led.high()
+        default: break
+        }
+    }
+    
+    sleep(ms: 10)
+}
diff --git a/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Package.swift b/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Package.swift
index dcc0bcb..7b6cc68 100644
--- a/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Package.swift
+++ b/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Package.swift
@@ -9,7 +9,6 @@ let package = Package(
         // Dependencies declare other packages that this package depends on.
         .package(url: "https://github.com/madmachineio/SwiftIO.git", branch: "main"),
         .package(url: "https://github.com/madmachineio/MadBoards.git", branch: "main"),
-        .package(url: "https://github.com/madmachineio/MadDrivers.git", branch: "main"),
     ],
     targets: [
         // Targets are the basic building blocks of a package, defining a module or a test suite.
@@ -19,8 +18,6 @@ let package = Package(
             dependencies: [
                 "SwiftIO",
                 "MadBoards",
-                // Use specific library name rather than "MadDrivers" would speed up the build procedure.
-                .product(name: "ST7789", package: "MadDrivers"),
             ]),
     ]
 )
diff --git a/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Sources/MorseCode/MorseCode.swift b/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Sources/MorseCode/MorseCode.swift
index fc712af..f636722 100644
--- a/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Sources/MorseCode/MorseCode.swift
+++ b/Examples/SwiftIOPlayground/11MoreProjects/MorseCode/Sources/MorseCode/MorseCode.swift
@@ -1,8 +1,6 @@
 // Import the SwiftIO library to set input/output and MadBoard to use pin id.
 import SwiftIO
 import MadBoard
-// Import the driver for the screen.
-import ST7789
 
 @main
 public struct MorseCode {
diff --git a/Examples/SwiftIOPlayground/11MoreProjects/MovingBall/Sources/MovingBall/MovingBall.swift b/Examples/SwiftIOPlayground/11MoreProjects/MovingBall/Sources/MovingBall/MovingBall.swift
index 14ad7dc..23a9c62 100644
--- a/Examples/SwiftIOPlayground/11MoreProjects/MovingBall/Sources/MovingBall/MovingBall.swift
+++ b/Examples/SwiftIOPlayground/11MoreProjects/MovingBall/Sources/MovingBall/MovingBall.swift
@@ -15,11 +15,11 @@ public struct MovingBall {
         let accelerometer = LIS3DH(i2c)
 
         // Initialize the pins for the screen.
-        let spi = SPI(Id.SPI0, speed: 30_000_000)
-        let cs = DigitalOut(Id.D5)
-        let dc = DigitalOut(Id.D4)
-        let rst = DigitalOut(Id.D3)
         let bl = DigitalOut(Id.D2)
+        let rst = DigitalOut(Id.D12)
+        let dc = DigitalOut(Id.D13)
+        let cs = DigitalOut(Id.D5)
+        let spi = SPI(Id.SPI0, speed: 30_000_000)
 
         // Initialize the screen with the pins above.
         let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
diff --git a/Examples/SwiftIOPlayground/11MoreProjects/Pong/Sources/Pong/Pong.swift b/Examples/SwiftIOPlayground/11MoreProjects/Pong/Sources/Pong/Pong.swift
index d0a434b..e148a41 100644
--- a/Examples/SwiftIOPlayground/11MoreProjects/Pong/Sources/Pong/Pong.swift
+++ b/Examples/SwiftIOPlayground/11MoreProjects/Pong/Sources/Pong/Pong.swift
@@ -14,10 +14,11 @@ public struct Pong {
         let spi = SPI(Id.SPI0, speed: 30_000_000)
         
         // Initialize the pins used for the screen.
-        let cs = DigitalOut(Id.D5)
-        let dc = DigitalOut(Id.D4)
-        let rst = DigitalOut(Id.D3)
         let bl = DigitalOut(Id.D2)
+        let rst = DigitalOut(Id.D12)
+        let dc = DigitalOut(Id.D13)
+        let cs = DigitalOut(Id.D5)
+
         // Initialize the LCD using the pins above. 
         // Rotate the screen to keep the original at the upper left.
         let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)
diff --git a/Examples/SwiftIOPlayground/11MoreProjects/TicTacToe/Sources/TicTacToe/TicTacToe.swift b/Examples/SwiftIOPlayground/11MoreProjects/TicTacToe/Sources/TicTacToe/TicTacToe.swift
index e491f00..be06acc 100644
--- a/Examples/SwiftIOPlayground/11MoreProjects/TicTacToe/Sources/TicTacToe/TicTacToe.swift
+++ b/Examples/SwiftIOPlayground/11MoreProjects/TicTacToe/Sources/TicTacToe/TicTacToe.swift
@@ -8,11 +8,11 @@ import ST7789
 public struct TicTacToe {
     public static func main() {
         // Initialize the SPI pin and the digital pins for the LCD.
-        let spi = SPI(Id.SPI0, speed: 30_000_000)
-        let cs = DigitalOut(Id.D5)
-        let dc = DigitalOut(Id.D4)
-        let rst = DigitalOut(Id.D3)
         let bl = DigitalOut(Id.D2)
+        let rst = DigitalOut(Id.D12)
+        let dc = DigitalOut(Id.D13)
+        let cs = DigitalOut(Id.D5)
+        let spi = SPI(Id.SPI0, speed: 30_000_000)
 
         // Initialize the LCD using the pins above. Rotate the screen to keep the original at the upper left.
         let screen = ST7789(spi: spi, cs: cs, dc: dc, rst: rst, bl: bl, rotation: .angle90)