1. Hardware Figure
The following are the hardware picture and its pin definition.
(Figure 1)
Before using the module, you must have power supply, you can have a power supply by
connecting usb.
After power on, the user can access the module by AT command.
In WMDD-209A, the user have to use UART to send / receive data to / from the node
You can refer to the following pic and figure 2 to connect UART for using the console.