Software Configuration Of Serial Ports; Receive Ports; Encoder Data Format - FreeFlight 2101 I/O Approach Plus Installation And Checkout Manual

B.4

SOFTWARE CONFIGURATION OF SERIAL PORTS

The serial ports may be configured by the user. The following is a list of the available ports:
• SERIAL-1 in
• SERIAL-1 out
• SERIAL-2 in
• SERIAL-2 out
To configure the serial ports of the FreeFlight 2101 I/O APPROACH PLUS, perform the following steps:
• Press until the INSTALL submode is activated
• Rotate the small, inner selector knob until the unit displays SERIAL-1 or SERIAL-2 in the top line
• Rotate the large, outer selector knob to select the desired port
To edit the contents of the selected serial port, perform the following steps:
• Press .
• Rotate the large, outer selector knob to select the desired field to edit
• Rotate the small, inner selector knob to change the character
• Repeat the previous two steps until the desired information is displayed
• Press to complete the entry
B.5

RECEIVE PORTS

B.5.1 Configuration
Two data formats may be selected to accept input from external altitude encoders, gray-code to serial altitude
converters, or the RMI (Rocky Mountain Instruments) µEncoder Airdata system. To select a data format, refer to
section B.4. The baud rate of each of these formats is automatically set; ENCODER is 9600 baud and RMI is 1200
baud.
B.5.2

Encoder Data Format

The Encoder data format accepts a variety of messages with the following parameters:
The data format is variable and depends upon the device generating the message. Compatible devices include
Rosetta Encoders and Serializers (ARS 50 and ARS 100). The simplest compatible format for altitude information
is the following 10 byte ASCII message:
Some examples include:
Revision E
May 31, 2006
Baud:
Parity:
Start Bit:
Data Bits:
Stop Bit:
Update Rate:
BYTE 0 1
CONTENTS A L
'ALT 00000'
'ALT -1200'
'ALT 62505'
'ALT 05604'
FreeFlight 2101 I/O Approach Plus GPS Navigation System
9600
None
1
8
1
1 msg/sec
2 3 4 5 6 7
T 1 2 3 4
0 feet
-1200 feet
62,505 feet
5,604 feet
8 9
5 c/r
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