diff --git a/extras/tools/README.md b/extras/tools/README.md
index c036b2fae..4dc8d8e2b 100644
--- a/extras/tools/README.md
+++ b/extras/tools/README.md
@@ -11,40 +11,39 @@ cd ~/Arduino/libraries/ArduinoIoTCloud/extras/tools
 ./bin2ota.py [MKR_WIFI_1010 | NANO_33_IOT] sketch.lzss sketch.ota
 ```
 
+## `lzss.py`
+This tool allows to compress a binary file using the LZSS algorithm.
+
+### How-To-Use
+* Encoding (Compressing)
+```bash
+./lzss.py --encode sketch.bin sketch.lzss
+```
+* Decoding (Extracting)
+```bash
+./lzss.py --decode sketch.lzss sketch.bin
+```
+
 ## `bin2ota.py`
 This tool can be used to extend (actually prefix) a binary generated with e.g. the Arduino IDE with the required length and crc values required to perform an OTA (Over-The-Air) update of the firmware.
 
 ### How-To-Use
 ```bash
-./bin2ota.py [MKR_WIFI_1010 | NANO_33_IOT] sketch.bin sketch.ota
+./bin2ota.py [MKR_WIFI_1010 | NANO_33_IOT] sketch.lzss sketch.ota
 ```
-#### `sketch.bin`
+#### `sketch.lzss`
 ```bash
-0000000   8000 2000 749D 0000 7485 0000 7485 0000
-0000030   0000 0000 0000 0000 7485 0000 74F1 0000
+ 0   80602012 0a0cbe01 0094bfa2 bff7807c
+16   bfdd00d9 655fd240 cfc11065 a071e0b2
 ...
 ```
-* `length(sketch.bin) = 0x0003'A5E0`
-* `CRC32(sketch.bin)  = 0xA9D1'265B`
-* `MAGIC NUMBER(MKR WIFI 1010)  = 0x2341'8054`
-* `VERSION = 0x0000'0000'0000'0000`
-
 #### `sketch.ota`
 ```bash
-0000000   A5E0 0003 265B A9D1 2341 8054 0000 0000
-0000010   0000 0000 8000 2000 749D 0000 7485 0000
+ 0   3bca0100 7e1c3a2b 54804123 00000000
+16   00000040 80602012 0a0cbe01 0094bfa2
 ...
 ```
-
-## `lzss.py`
-This tool allows to compress a binary file using the LZSS algorithm.
-
-### How-To-Use
-* Encoding (Compressing)
-```bash
-./lzss.py --encode sketch.bin sketch.lzss
-```
-* Decoding (Extracting)
-```bash
-./lzss.py --decode sketch.lzss sketch.bin
-```
\ No newline at end of file
+* `length(sketch.lzss) = 3bca0100 -> 0x0001'CA3B`
+* `CRC32(sketch.lzss + MAGIC NUMBER + VERSION) = 7e1c3a2b -> 0x2B3A'1C7E`
+* `MAGIC NUMBER(MKR WIFI 1010) = 54804123 -> 0x2341'8054`
+* `VERSION = 00000000 00000040 -> 0x40'00'00'00'00'00'00'00`
diff --git a/extras/tools/bin2ota.py b/extras/tools/bin2ota.py
index 48545c83d..99e86c0df 100755
--- a/extras/tools/bin2ota.py
+++ b/extras/tools/bin2ota.py
@@ -26,8 +26,8 @@
     print ("Error,", board, "is not a supported board type")
     sys.exit()
 
-# Version field (byte array of size 8)
-version = bytearray(8)
+# Version field (byte array of size 8) - all 0 except the compression flag set.
+version = bytearray([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40])
 
 # Prepend magic number and version field to payload
 bin_data_complete = magic_number + version + bin_data