TFTP

update docs

docs/tftp.md

@@ -25,9 +25,9 @@ tftp_server_deinit();
 ## Usage
 The TFTP task is used to receive and send files via TFTP.
 ### Receive a file
-index.txt contains a list of files on the file system.
+index.txt contains a list of files on the file system. For some weird reason tftp only works in octet mode.
 ```bash
-bash $ tftp <ip>
+bash $ tftp -m octet <ip>
 tftp $ get index.txt
 ```
 ### Send a file