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USER MANUAL FOR HARDWARE REV 3.11
07-APR-2018
PAGE 3
3.
HARDWARE INTRODUCTION
There are many features built into this little board that you
should be aware of as they can easily be missed when setting
up the hardware for the first time. Your software selection
may or may not support all the features right out of the gate.
This board contains the following features which will be
discussed in more detail in the following sections
2 independent repeater channels
o
Selectable High/Low COS/COR
o
Selectable High/Low CTCSS
o
Selectable Flat Audio
o
Adjustable audio input level
o
Adjustable audio output level
Built in audio (input/output)
Analog to Digital Converter
GPIO expansion
GPS (Optional expansion)
I2C Expansion Header
SPI Expansion Header
I2S Expansion Header
1-Wire Header
UART Header (shared with GPS)
PI Stacking Header
GPIO
PORT 2
PORT 1
ADC
I2C
SPI
UART
Stacking
Header
GPS PORT 2
