Update Doc

Author: epsilonrt

Doxyfile

@@ -61,7 +61,7 @@ PROJECT_BRIEF          = "Modbus library for Arduino"
 # pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
 # the logo to the output directory.
 
-PROJECT_LOGO           = https://github.com/epsilonrt/modbus-arduino/raw/master/extras/modbus.png
+PROJECT_LOGO           = 
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
 # into which the generated documentation will be written. If a relative path is

README.md

@@ -1,6 +1,10 @@
 # Modbus Library for Arduino
 Allows your Arduino to communicate via Modbus protocol
 
+<a href="https://modbus.org/">
+  <img src="https://github.com/epsilonrt/modbus-arduino/raw/master/extras/modbus.png" alt="Modbus Logo" align="right" valign="top">
+</a>
+
 [![GitHub release (latest by date including pre-releases)](https://img.shields.io/github/v/release/epsilonrt/modbus-arduino?include_prereleases)](https://github.com/epsilonrt/modbus-arduino/releases) 
 [![Framework](https://img.shields.io/badge/Framework-Arduino-blue)](https://www.arduino.cc/)