Globalstar STX3, User Manual, Page: 10 / 32

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QUICK TEST OF DEV KIT OPERATION
The quick test will have you receiving a message from the STX3 message within minutes. It is recommended that
you run the quick test after first receiving the Dev Kit. The quick test does not require the smartphone App and will
provide a quick method for sending a test message packet through the Globalstar network. After registering the ESN
for your Dev Kit with Globalstar, the network will direct your messages from the Dev Kit to what you designated with
your provided route (email, URL, etc.). The Dev Kit will need to be connected to a host computer for powering it up.
STEPS FOR THE QUICK TEST
1. Place Dev Kit board in a location outside with a clear view of the sky.
2. Connect the supplied host computer to the development kit using the provided USB Y-cable.
3. Once power is applied to the Dev Kit you will see three LEDs illuminate. The blinking LEDs (LD3 & LD4) indicate
that the processor is running and the system is ready. The solid green LED (LD2) will indicate the main power
supply is enabled. The processor will boot in approximately 2 seconds.
4. Simply press the USER button located on the Main board of the Dev Kit. After pressing the USER button, a
green LED(LD1) on the Transmitter board will turn on for approximately 1 second and red LED on the main
board will stay on. The STX3 is transmitting when this green LED is on. The STX3 module will transmit the same
test message packet 3 times with a random delay between messages of 5-10 minutes. Each time the STX3
transmits, the green LED will briefly turn on and the message will be transmitted. The red LED (LD3) will stay red
until all 3 messages have been transmitted.
5. The route used for the registered ESN of the Dev Kit will receive the test message packet. It may take between to
5-20 minutes to receive the message.
The quick test transmits the test message packet as defined in the STX3 User Manual.
USING THE SERIAL INTERFACE WITH THE DEV KIT
When interfacing a host computer to the Dev Kit, two USB ports on the host computer or USB hub are required.
Use the USB Y-cable provided with the Dev Kit to connect between the Dev Kit and the host computer. Both Type-A
USB connectors must be connected to the host computer.
The Dev Kit will appear to the host computer as a virtual COM port and will be ready to communicate with the
following settings.
• Baud Rate - 115200
• Bits - 8
• Parity - None
• Stop bits – 1
A serial terminal program (for example, puTTY ) can be used to communicate and configure the device. Once
connected, the “?” command can be used to display a list of command options.
A simple, text-based command infrastructure has been built to provide these examples. Each command has a
unique command name, followed by one or more arguments. The end of the command is indicated by end of line
characters. This same serial command interface is used for both BLE and USB communications.