WRTnode connection TTL to USB devices
USB to TTL：
WRTnode connection USB to TTL devices
Red is VCC, not connected.
RX ——》 Receive
TX ——》 Transmit
Downloadand install the usb to ttl drive
In WIN8 need to disable the driver installed under automatic updates.
As shown, if there is an exclamation point, indicating that the driver installation fails
Uninstalling this driver
Disable automatic update drivers
Open the Control Panel -> Devices and Printers, find your own computer name in the device, the right to enter the installation settings, as shown below:
Save the changes.
Install a already downloaded the driver
Download serial debugging software PuTTY
Baidu search and download Putty or directly click download PuTTY
Open the computer's Device Manager to view the corresponding port number.
After setting the TTL unable to enter into the serial, press the map settings.