diff --git a/src/shared/drivers/gamma868/CircularBuffer.h b/src/shared/drivers/gamma868/CircularBuffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..17420e20b2673c1755d6457574abf21cea41ae20
--- /dev/null
+++ b/src/shared/drivers/gamma868/CircularBuffer.h
@@ -0,0 +1,157 @@
+/* Copyright (c) 2017 Skyward Experimental Rocketry
+ * Authors: Alvise de'Faveri Tron
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef CIRCULARBUFFER_H
+#define CIRCULARBUFFER_H
+
+#include "gamma_config.h"
+#include <pthread.h>
+#include <stdio.h>
+
+class CircularBuffer {
+    public:
+	
+	/*
+	 * Creates a buffer with fixed dimension (decided in gamma_config).
+	 */
+	CircularBuffer(){};
+	
+	/*
+	 * TODO check if it's good practice.
+	 * Creates a buffer with given dimension (uses new!).
+	 * 
+        CircularBuffer(int totalSize){
+	    this.totalSize = totalSize;
+	    buffer = new char[totalSize];
+	}
+	
+	*/
+	
+	/*
+	 * Calculates the occupied portion of the buffer.
+	 */
+	
+	unsigned int size()
+	{
+	    if(last == -1)return totalSize;
+	    else if(last < first) return totalSize - (first - last);
+	    else return last - first;
+	}
+	
+	/*
+	 * Reads at maximum n chars from the buffer and stores them in *buf
+	 * in subsequent positions starting from offset.
+	 * Returns the number of characters stored (could be less than n
+	 * if the buffer contains less than n characters).
+	 */
+	unsigned int read(unsigned int n, char *buf, int offset)
+	{
+	    unsigned int nChar = size() > n ? n : size();    
+	    int i = 0;
+	    
+// 	    printf("BEFORE READING\n");
+// 	    print();
+	    
+	    pthread_mutex_lock(&outBufMutex);
+	    for(i = 0; i < (int)nChar; i++)
+	    {
+		if(i==0 && last == -1) last = first;
+		
+		buf[offset+i] = buffer[first];
+		first++;
+		if(first == totalSize)
+		    first = 0;
+		if(first == last)
+		    break;
+	    } 
+	    pthread_mutex_unlock(&outBufMutex);
+	    
+// 	    printf("AFTER READING\n");
+// 	    print();
+	    
+	    return i;
+	}
+	
+	/*
+	 * Writes n characters in the buffer (or until it is full).
+	 * Returns the number of chars effectively written.
+	 */
+	unsigned int write(unsigned int n, const char *chars)
+	{
+	    unsigned int i = 0;
+	    
+// 	    printf("BEFORE WRITING %s\n", chars);
+// 	    print();
+	    
+	    pthread_mutex_lock(&outBufMutex);
+	    if((int)size() < totalSize)
+	    {
+		for(i = 0; i < n; i++)
+		{
+		    buffer[last] = chars[i];
+		    last++;
+		    
+		    if(last == totalSize) 
+			last = 0;
+		    if(last == first)
+		    {
+			last =-1;
+			break;
+		    }
+		}
+	    }
+	    pthread_mutex_unlock(&outBufMutex);
+	    
+// 	    printf("AFTER WRITING\n");
+// 	    print();
+	    
+	    return i;
+	}
+	
+	/*
+	 * TODO toString.
+	 * Prints the whole content of the buffer (for debug pupouses).
+	 
+	 void print(){
+            printf("Buffer: first %d last %d occupied %u total size %d\n", 
+                    first, last, size(), totalSize);
+        
+            int offset = first;
+            for (int i = 0; i < totalSize; i++){
+                if (offset + i == totalSize) offset = -i;
+                printf("%c", buffer[i]);
+            }
+            printf("\n");
+        }
+        */
+        
+	
+    private:
+	int totalSize = OUT_BUFFER_SIZE;
+	int first = 0;
+	int last = 0;
+	char buffer[OUT_BUFFER_SIZE];
+	
+	pthread_mutex_t outBufMutex;
+};
+
+#endif /* CIRCULARBUFFER_H */
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