diff --git a/documentation/SPI-Proto b/documentation/SPI-Proto
new file mode 100644
index 0000000..bf19dd5
--- /dev/null
+++ b/documentation/SPI-Proto
@@ -0,0 +1,26 @@
+ 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+ +-------------+ +-------------+ +-------------+ +-------------+
+ |   OpCode    | |   Address   | |    ValueH   | |    ValueL   |
+ +-------------+ +-------------+ +-------------+ +-------------+
+
+
+Where following values are Valid:
+|--------------------------------------------------------------------------------------------------------------------------|
+| Binary		Hex	Name		Address		ValueL		ValueH		Reply		Description|
+|--------------------------------------------------------------------------------------------------------------------------|
+| 0000001		0x01	Read-Temp	Number of	None/Rand	None/Rand	A 16Bit Value	Reads the  |
+|						Thermometer					Representing 	Temperature|
+|						Starting with 0					the Temperature		   |
+|--------------------------------------------------------------------------------------------------------------------------|
+| 0000002		0x02	Read-Var8	Number of the	None/Rand	None/Rand	A 8Bit Value	Reads 8Bit |
+|  						var-DEFINE					read from VAR	Variable   |
+|--------------------------------------------------------------------------------------------------------------------------|
+| 0000003		0x03	Read-Var16	Number of the	None/Rand	None/Rand	A 16Bit Value	Reads 16Bit|
+|  						var-DEFINE					read from VAR	Variable   |
+|--------------------------------------------------------------------------------------------------------------------------|
+| 0000004		0x04	Write-Var8	Number of the	Value of Var	None/Rand	None/Rand	Writes 8Bit|
+|  						var-DEFINE	to write					Variable   |
+|--------------------------------------------------------------------------------------------------------------------------|
+| 0000005		0x05	Write-Var16	Number of the	Value of Var	Value of Var	None/Rand	Writes 16  |
+|  						var-DEFINE	to write (HIGH)	to write (LOW)			Bit Var    |
+|--------------------------------------------------------------------------------------------------------------------------|