An announcement about this board and it features is on
One of the nice things about this board is that it has an USB connector for programming (and power).
There is a lot of info how to use the ESP8266 Wifi chip.
Visit e.g. http://benlo.com/esp8266/esp8266QuickStart.html
An description how to change the COM port and find what was connected to the "old com4 port" was posted by user Antony in 2012 on http://superuser.com/questions/389539/how-do-i-find-the-device-which-has-com-port-x-reserved-want-to-reclaim-the-por ( or better use this permalink ).
As i do not want to lose this info i copied the text also below in this blog article :
How do I find the device which has Com Port X reserved - want to reclaim the port num for different device.
"Method Using Elevated Command Prompt"From Start Menu type cmd into search bar right click on cmd.exe and select run as administrator at UAC select yes to allow Windows Command Processor Program to make changes.
At the Command prompt type
SET DEVMGR_SHOW_NONPRESENT_DEVICES=1 (Followed by enter)
Then to open device manager type
DEVMGMT.MSC (Followed by enter)
In device Manager select View / Show hidden devices
Expand Ports (COM & LPT)
Hidden ports reserved will be shown with greyed out symbol & associated manufacturer / device type
To re-hide non present devices in future - from an elevated Command prompt type
SET DEVMGR_SHOW_NONPRESENT_DEVICES=0 (Followed by enter)
SET DEVMGR_SHOW_NONPRESENT_DEVICES=1 (Followed by enter)
Then to open device manager type
DEVMGMT.MSC (Followed by enter)
In device Manager select View / Show hidden devices
Expand Ports (COM & LPT)
Hidden ports reserved will be shown with greyed out symbol & associated manufacturer / device type
To re-hide non present devices in future - from an elevated Command prompt type
SET DEVMGR_SHOW_NONPRESENT_DEVICES=0 (Followed by enter)
