Figure 9 :: Serial Interface, Auxiliary Serial Port Basic Connection; Figure 10 :: Serial Interface, Auxiliary Serial Port With Hardware Trigger - Lightware SF02 Product Manual

Table of Contents

SF02

Laser rangefinder

! !

Auxiliary serial port

The auxiliary serial port on screw terminals 8 and 9 outputs an ASCII encoded string as a floating point representation of the distance

measured. The serial port uses 0 V / 3.3 V logic and is designed for direct connection to a similar serial port on the host controller.

! !

The baud rate is selectable using the menu system.

! !

The time when distance data is transmitted from the auxiliary serial port is controlled by one of two triggers. The first is a software

trigger provided by the host controller through its serial port and consists of the ASCII code for the letter <D>. When the SF02

receives this character it outputs the next available distance result which will happen in less than 100 ms.

There is an alternative hardware trigger on screw terminal 4 that can be controlled by a digital port pin on the host controller. This

trigger is active low and can be either a negative going pulse or can be held low in order to get a continuous stream of distance data

! !

from the auxiliary serial port.

! !

SF02 Laser Rangefinder - Product Manual - Revision 4

Product manual

Figure 9 :: Serial interface, Auxiliary serial port basic connection

! of !

Table of Contents