diff --git a/shared/emulator.hpp b/shared/emulator.hpp
index 2be7cb6..9ac682e 100644
--- a/shared/emulator.hpp
+++ b/shared/emulator.hpp
@@ -227,6 +227,8 @@ friend class ArduinoSimulationController;
 	logtime_t mPinWriteDelay;
 	logtime_t mPinSetModeDelay;
 
+	std::deque<char> mSerialData;
+
 	void reset()
 	{
 		mCurrentTime = 0;
@@ -616,6 +618,50 @@ friend class ArduinoSimulationController;
 	{
 		return mEnableSerial;
 	}
+
+	/**
+	 * Enqueue additional serial data to be read by the emulated code.
+	 */
+	void addSerialData(const std::string& str)
+	{
+		for (char c : str) {
+			mSerialData.push_back(c);
+		}
+	}
+
+	/**
+	 * Return number of bytes enqueued in serial buffer.
+	 */
+	std::size_t serialDataAvailable() const
+	{
+		return mSerialData.size();
+	}
+
+	/**
+	 * Return the next byte (char) to be read from the serial buffer.
+	 */
+	char peekSerial() const
+	{
+		if (mSerialData.empty()) {
+			return '\0';
+		}
+
+		return mSerialData.front();
+	}
+
+	/**
+	 * Return and pop one char from the serial data buffer.
+	 */
+	char readSerial()
+	{
+		if (mSerialData.empty()) {
+			return '\0';
+		}
+
+		char res = mSerialData.front();
+		mSerialData.pop_front();
+		return res;
+	}
 };
 
 #endif
diff --git a/shared/interface.cpp b/shared/interface.cpp
index e488a89..dc04fca 100644
--- a/shared/interface.cpp
+++ b/shared/interface.cpp
@@ -268,4 +268,48 @@ void SerialMock::println(const char* val)
 	}
 }
 
+std::size_t SerialMock::available() const
+{
+	if (!emulator.isSerialEnabled()) {
+		throw ArduinoEmulatorException("The Serial interface is disabled in the emulator.");
+	}
+	return emulator.serialDataAvailable();
+}
+
+int SerialMock::peek() const
+{
+	if (!emulator.isSerialEnabled()) {
+		throw ArduinoEmulatorException("The Serial interface is disabled in the emulator.");
+	}
+	if (emulator.serialDataAvailable() == 0) {
+		return -1;
+	}
+	return emulator.peekSerial();
+}
+
+int SerialMock::read()
+{
+	if (!emulator.isSerialEnabled()) {
+		throw ArduinoEmulatorException("The Serial interface is disabled in the emulator.");
+	}
+	if (emulator.serialDataAvailable() == 0) {
+		return -1;
+	}
+	return emulator.readSerial();
+
+}
+
+std::size_t SerialMock::readBytes(char* buffer, std::size_t length)
+{
+	if (!emulator.isSerialEnabled()) {
+		throw ArduinoEmulatorException("The Serial interface is disabled in the emulator.");
+	}
+	length = std::min(length, emulator.serialDataAvailable());
+	for (std::size_t i = 0; i < length; ++i) {
+		buffer[i] = emulator.readSerial();
+	}
+	return length;
+}
+
+
 SerialMock Serial;
diff --git a/shared/interface.hpp b/shared/interface.hpp
index d14ec8c..a062b77 100644
--- a/shared/interface.hpp
+++ b/shared/interface.hpp
@@ -194,6 +194,7 @@ enum SerialPrintFormat {
 	HEX,
 };
 
+// A subset of Serial class
 class SerialMock
 {
 public:
@@ -221,6 +222,11 @@ class SerialMock
 	void println(unsigned long long val, SerialPrintFormat format = DEC);
 	void println(double val);
 	void println(const char* val);
+
+	std::size_t available() const;
+	int peek() const;
+	int read();
+	std::size_t readBytes(char* buffer, std::size_t length);
 };
 
 extern SerialMock Serial;