2.3 Development Kit Configuration
This development kit may be used as a stand alone development kit interfaced to a
PC or as a shield connected to another development kit with a compatible Arduino
shield interface.
The SW1 DIP switch will ship with a piece of tape covering the switches. This should
be removed by the user upon getting started with the kit.
2.3.1 USB Interfaces
The development kit has two USB Mini-B connectors to allow for the use of the
modem's serial UART AT command interface and/or the modem's USB interface.
The J5 USB interface is for connecting to the modem's USB interface. The USB
interface will allow customers to connect to multiple different communication ports on
the modem including:
-
AT Command interfaces
-
Debug interfaces for modem diagnostic tools
-
GNSS NMEA streaming interfaces
The specific USB interfaces available will be modem specific and connecting to the
USB interface will require that users download the modem's USB drivers from its
product page.
The J14 interface will connect to the modem's USB to serial UART interface IC to
access the modem's serial UART interface. The USB to serial UART interface IC used
on the J14 USB interface is an FTDI FT234XD. The FTDI drivers for the FT234XD are
available on
.
2.3.2 UART Selection
The Skywire modem's UART interface is multiplexed to several different interfaces on
the development kit to allow for easy interfacing with different host development kits
and for accessing it through the USB to serial UART interface (J14).
The USB to serial interface will be automatically selected when a USB connection is
powered on J14 and will override the selection switch for the other UART interfaces.
This feature may be bypassed, if desired, by modifying the circuit board.
PN 1002634 REV 1
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