Globalstar STX3 Page 17 User Manual Download | Manualshive

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SENSORS

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Temperature/Humidity - This is a Silicon Labs
(manufacturer part number Si7020-A20) sensor that
integrates the temperature and humidity monitoring.
The sensor is an I2C slave device connected to the
Nordic processor. The sensor has a protective white
cover on the top part of the package. The white cover
should NOT be removed as it protects the sensor
element from moisture. Please note the I2C bus is
also shared with the accelerometer.

•

Accelerometer - The ST Micro 3 axis accelerometer
(manufacturer part number LIS2DH12TR) sensor
is an I2C slave device connected to the Nordic
processor. The sensor includes an interrupt signal
that allows for the firmware customization. The
accelerometer and temperature/humidity sensor
share the same I2C bus.

•

Analog Adjust Resistor Potentiometer - The Dev Kit
includes an adjustable potentiometer connected to
an A/D pin (P0.31/AIN7) on the Nordic processor.
This is a basic 1-turn 0-10K trimmer potentiometer
configured as a simple voltage divider network. The
preprogrammed firmware on the Nordic processor
monitors that pin.

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Summary of Contents for STX3

Page 1: ...USER MANUAL STX3 DEVELOPMENT KIT WITH BLE TECHNOLOGY 9150 0137 01 R 2 ...

Page 2: ...E ONTO THE DEV KIT 7 QUICK TEST OF DEV KIT OPERATION 8 Steps for the Quick Test 8 USING THE SERIAL INTERFACE WITH THE DEV KIT 8 USING THE STX3 DK BLE SMARTPHONE APP WITH THE DEV KIT 10 SUMMARY OF STX3 COMMANDS 12 NOTES 12 HARDWARE DESCRIPTION 13 STX3 Module 13 Bluetooth 13 Power Supplies 13 Dev Kit Power Circuitry 14 LED s 14 Buttons 14 Sensors 15 USB Interface 16 Connector Interfaces 16 Test Poin...

Page 3: ...eers and technical management and assumes a general knowledge of basic engineering practices by the user APPLICABLE DOCUMENTS Globalstar STX3 User Manual Globalstar STX3 Development Kit with BLE Technology Quick Start Guide Globalstar STX3 Development Kit with BLE Software Design Guide DEV KIT INCLUDES When opening the Dev Kit box it will include the following items shown INTRODUCTION DEV KIT BOAR...

Page 4: ...lly connected to the Nordic Bluetooth processor through the two headers that attach the two PCBs of the Dev Kit together Also the Main PCB provides power an RF connection to the transmit antenna and communications with a host processor which will control the operation of the STX3 KEY FEATURES OF THE STX3 DEV KIT WITH BLE Globalstar Satellite Transmitter STX3 nRF52832 flash based ANT ANT Bluetooth ...

Page 5: ... Manual The Dev Kit allows the hardware designer or firmware developer the platform to easily evaluate the STX3 and provide a platform for quickly creating new products The block diagram shown in Figure 1 represents the features of the two boards and interfaces Transmitter Board The transmitter board consists of the STX3 module patch antenna and power supply for the STX3 RF transmitter A standard ...

Page 6: ...or Nordic processor H BLE chip antenna I Green LED indicates when RF power supply is enabled LED is only ON during STX3 transmission J Expansion Header connected to processor K Analog potentiometer L USB connector for applying power and serial terminal interface M Label with ESN number Required for registration of STX3 module in Globalstar network N Green LED indicates voltage output from main pow...

Page 7: ...ncludes the interface headers between the Transmitter board and the sockets on the Main board Also included are the expansion header connected to the Nordic processor and a header that interfaces directly with the STX3 module 6 BLE Nordic processor page 6 This page includes the Nordic BLE processor BLE chip antenna processor controlled LED s SWD JTAG header reset button user button and all support...

Page 8: ...T LOCATION PARAMETER TEST CONDITIONS MIN TYP MAX UNIT STX3 TX output power 40 to 85 C VRF 3 3 volts 18 0 18 5 19 0 dB STX3 Transmit mode supply current Transmitter board 40 to 85º C VRF 3 3 volts 315 325 350 mA Operating Temperature Range 0 40 C Power Supply Operational Range 1 8V 5 2V Table 1 STX3 Dev Kit Operating Conditions Parameters ...

Page 9: ...rdic nRF52832 processor is pre programed with firmware that supports a Communication with the BLE app b Terminal commands with a host computer using the USB connection c A quick test feature The Dev Kit supports developing your own firmware using the development environment of your choice but using the Nordic SDK environment is recommended The Dev Kit was designed for easy connection using the Seg...

Page 10: ...itting 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 te...

Page 11: ...bursts The number of bursts interval_min The minimum burst interval interval_max The maximum burst interval If no arguments are used then command 0x07 is issued to query the current setup state Query HW Version hardware Uses the serial command format to send the command 0x09 to return the STX3 hardware version CW Test Mode test_cw Uses the serial command format to send the command 0xFC01 to enter ...

Page 12: ...he smartphone app will establish communication with the Dev Kit The following three screen shots show the smartphone app booting and scanning for Dev Kits When an ESN is selected the main screen of the STX3DK BLE smartphone app will be displayed On the main screen the following items will be shown a Send Data Command with its associated Send button b The temperature and humidity sensor readings wi...

Page 13: ...correlate to the payload of the STX3 s Send Data command See the STX3 User Manual for details on the Send Data command Pressing the Console button at the top right of the main screen will display the Send Commands screen A text line is displayed along with its associated Send command button Entering in the send command line will bring up a list of supported commands It is recommended to review the...

Page 14: ... Version firmware Uses the serial command format to send command 0x05 to return the STX3 current firmware version Setup setup channel bursts interval_min interval_max Uses the serial command format to send command 0x06 to setup the device The parameters are comma separated and are entered in the decimal format channel The RF Channel bursts The number of bursts interval_min The minimum burst interv...

Page 15: ...dditional details please review the STX3 User Manual BLUETOOTH The main processor by Nordic Semiconductor nRF52832 integrates the low energy Bluetooth radio BLE RAM 256KB flash 512KB and real time clock This processor BLE IC is an SOC solution located on the Main board The processor is based on the ARM M4 core running at 64MHz The 2 4Ghz RF section for the BLE radio uses a chip antenna with the op...

Page 16: ... supply supports everything on the Dev Kit except the STX3 RF power supply The power supply also includes a 2 pin header J6 used to temporarily disable power to the Dev Kit board without removing the USB cable Applying the shunt across J6 will disable the main power supply LED S The Dev Kit includes four LED s with three of them located on the Main board and one located on the Transmitter board Ma...

Page 17: ... accelerometer Accelerometer The ST Micro 3 axis accelerometer manufacturer part number LIS2DH12TR sensor is an I2C slave device connected to the Nordic processor The sensor includes an interrupt signal that allows for the firmware customization The accelerometer and temperature humidity sensor share the same I2C bus Analog Adjust Resistor Potentiometer The Dev Kit includes an adjustable potentiom...

Page 18: ...TX3 configuration and STX3 reset The Transmitter board also has an unpopulated 1x6 header J1 that allows for connecting the Transmitter board to an off board processor A separate unpopulated 2x3 header J2 allows for the Transmitter board to be connected to an off board power source Main board interfaces Aside from the micro USB there is the 2x10 JTAG header J10 2x6 header J8 for expansion and the ...

Page 19: ...he development kit https www segger com products debug probes j link models j link base Nordic nRF Command Line Tools Command line programming tools for the Nordic nRF52 processor https www nordicsemi com Software and Tools Development Tools nRF5 Command Line Tools Nordic nRF Connect A set of tools for testing Bluetooth Low Energy products Nordic has versions for iOS Android and the PC PuTTY A ter...

Page 20: ...the end device will be marketed For more information on regulatory compliance refer to the specific country radio regulations in the following sections and or a certified regulatory compliance testing company RADIO ASTRONOMY SITE AVOIDANCE The end user device must comply with the requirements for Radio Astronomy Site avoidance as specified by the Globalstar National Science Foundation agreement of...

Page 21: ...e and 2 this device must accept any interference received including interference that may cause undesired operation This Class B digital apparatus complies with Canadian ICES 003 This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference ...

Page 22: ...I APPENDIX A STX3 DEVELOPMENT KIT SCHEMATIC ...

Page 23: ...II ...

Page 24: ...III ...

Page 25: ...IV ...

Page 26: ...V ...

Page 27: ...VI ...

Page 28: ...VII ...

Page 29: ...VIII ...

Page 30: ...IX ...

Page 31: ...X APPENDIX B STX3 DEVELOPMENT KIT BILL OF MATERIAL LISTS TRANSMITTER BOARD BILL OF MATERIAL ...

Page 32: ...XI MAIN BOARD BILL OF MATERIAL ...

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