diff --git a/fx1sample/fx1utils.ino b/fx1sample/fx1utils.ino
new file mode 100644
index 0000000..54eaf6d
--- /dev/null
+++ b/fx1sample/fx1utils.ino
@@ -0,0 +1,74 @@
+//
+// 16 bit data access
+//
+void set16BitLE(unsigned char *pData, UINT16 value)
+{
+    *(pData+0) = value & 0xFF;
+    *(pData+1) = (value >> 8) & 0xFF;
+}
+
+UINT16 get16BitLE(unsigned char *pData)
+{
+    UINT16 value = 0;
+    value  = *(pData+0);
+    value += (*(pData+1) << 8) & 0xFF00;
+    return value;
+}
+
+void set16BitBE(unsigned char *pData, UINT16 value)
+{
+    *(pData+0) = (value >> 8) & 0xFF;
+    *(pData+1) = value & 0xFF;
+}
+
+UINT16 get16BitBE(unsigned char *pData)
+{
+    UINT16 value = 0;
+    value  = (*(pData+0) << 8) & 0xFF00;
+    value += *(pData+1);
+    return value;
+}
+
+//
+// 32 bit data access
+//
+void set32BitLE(unsigned char *pData, UINT32 value)
+{
+    *(pData+0) = value & 0xFF;
+    *(pData+1) = (value >> 8)  & 0xFF;
+    *(pData+2) = (value >> 16) & 0xFF;
+    *(pData+3) = (value >> 24) & 0xFF;
+}
+
+UINT32 get32BitLE(unsigned char *pData)
+{
+    UINT32 value = 0;
+    value  = *(pData+0);
+    value += *(pData+1) << 8;
+    value += *(pData+2) << 16;
+    value += *(pData+3) << 24;
+    return value;
+}
+
+void set32BitBE(unsigned char *pData, UINT32 value)
+{
+    *(pData+0) = (value >> 24) & 0xFF;
+    *(pData+1) = (value >> 16) & 0xFF;
+    *(pData+2) = (value >> 8) & 0xFF;
+    *(pData+3) = value & 0xFF;
+}
+
+
+unsigned short calcCheckSum(unsigned char Message[], int nBytes)
+{
+    unsigned short  sum = 0;
+    
+    while(nBytes-- > 0) {
+      sum += *(Message++);
+    }
+    sum = (~sum);
+    sum++;
+
+    return sum;
+}
+