Update README.md

README.md

@@ -19,3 +19,12 @@ Your friends/customers then only need three files without any installation requi
 1.	ESPTool.exe.
 2.	The resulting file produced by ImageMerge.
 3.	A batch file starting ESPTool with the required arguments.
+
+Usage:
+ImageMerge -prog firmware.bin -fs littlefs.bin -image everything.bin -offset 1024  -v
+This will produce everything bin from firmware.bin and littlefs.bin.
+Distribute this file with Esptool.exe and upload.bat
+
+On customer side:
+Copy Esptool.exe. upload.bat and everything.bin to a folder. Open a CMD window in this folder.
+Execute upload.bat with a connected ESP-board.