RF Neulink NL900S User Manual
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NL900S USER MANUAL
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should be labeled something like “FT232R USB UART” and/or “USB Serial Port”. 
Highlight each one individually (if more than one exists), then browse to the “Action” menu 
and select “Uninstall”. Do this until all Items with yellow question marks labeled as noted 
above are gone. 
• Browse to the “Action” menu, and select “Scan for hardware changes”.
• Now, follow the instruction in section 3 of the “Quick Start Guide”.
 
LED Functionality 
LED Definitions Below
LED# - Color
Normal Operation
4 - Green
MCU Activity [ Solid = Radio Base OS booting, Blinking = NL900S software loaded 
and running ]
4 - Red
MCU Error [ Solid only, indicates unrecoverable error, power cycle needed ]
3 - Green
Serial and/or USB data is being sent [ to the host computer ]
3 - Red
Serial and/or USB data is being received [ from the host computer ]
1 - Green
Radio RX/Sync [ data or base station sync received ]
2 - Red
2 - Green
Radio TX [ transmitter active ] 
Radio RX (Receive Data)
2.0 Quick Start Trouble Shooting Guide 
 
The following is a list of the most important fields of the radios programming. .
1
Network I.D. All radios on the same network must have the same ID number. The 
choices are 1-255. 
