Mikroelektronika d.o.o.
Carte à clic LTE IoT 3
Carte à clic LTE IoT 3
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La carte Click Board™ LTE IoT 3 est une carte complémentaire compacte qui contient un module IoT sans fil Low Power Wide Area (LPWA) qui permet des connexions aux réseaux LTE, NB-IoT et 2G. Cette carte est équipée du module sans fil LTE-IoT EXS82-W de Thales qui offre un riche ensemble de protocoles Internet et d'interfaces standard de l'industrie telles que UART, USB, etc. La connectivité IoT mondiale, la prise en charge GNSS intégrée, la prise en charge SMS, la portée de couverture étendue et la consommation d'énergie réduite font de ce module IoT unique un excellent choix pour les fabricants d'appareils tout en garantissant une fiabilité mondiale. Cette carte Click Board™ convient aux petits appareils alimentés par batterie dans des endroits éloignés tels que les compteurs intelligents, les dispositifs de suivi des actifs, les applications de santé, les appareils portables, les solutions de ville intelligente et bien d'autres.
Le LTE IoT 3 Click est pris en charge par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Ce Click Board™ est un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
How Does The LTE IoT 3 Click Board™ Work?
The LTE IoT 3 Click Board™ is based on the EXS82-W, a Low Power Wide Area (LPWA) Wireless IoT module that allows connections to the LTE CAT-M1, CAT NB1/2, and 2G networks from Thales. EXS82 IoT module supports all LTE bands and offers an efficient architecture with PSM and eDRX plus embedded processing. The EXS82 also includes a module services engine that supports a range of Internet services and optimized operations. State of the art security features protect the device as well as data and provide secure enrollment in cloud platforms enabling trust in the IoT ecosystem. The module's simplified power supply design and advanced management system extend battery lifetime and improve the total cost of ownership.
The integrated GNSS receiver supports the NMEA protocol via the ASC0 interface, which represents combined electrical and data specification for communication between various electronic devices including GNSS receivers. By default, the GNSS receiver is switched off. It has to be switched on and configured using AT commands.
The LTE IoT 3 Click Board™ is equipped with the USB type C connector. It allows the module to be powered and configured by a personal computer (PC) using FT230X, a compact USB to a basic serial UART interface device which has been designed to operate efficiently with USB host controllers by using as little bandwidth as possible when compared to the total USB bandwidth available. The UART interface operates at 115200 bps and it is used for exchanging AT commands with the host, data transfer, and the firmware update. It also possesses the RX/TX LED Indicator whose indicates whether the bridge is in RX or TX function.
PWR Header can be used for power consumption monitoring:
The LTE IoT 3 Click Board™ can be battery powered and used as a stand-alone device. It also has MC34671, a fully-integrated Li-Ion or Li-Polymer battery charger that allows charging of battery when Click board™ is inserted in mikroBUS™ socket or plugged into a USB port, while the CHG LED indicator which will indicate the charging in progress and will turn off once the battery charging is finished. The Nano SIM card holder on the back of the Click board™ is used to install a nano-SIM card. Two SMA antenna connectors with an impedance of 50Ω are used for connecting the appropriate antennas: there is one SMA connector for LTE antenna and the second one for GNSS antenna on which active antennas can be used either supplied with 3V or 5V, that can be selected by appropriate jumper (J2 or J3).
The yellow LED labelled as STAT is used to visually indicate different operating modes of the module. Another indicator that this Click board™ has is the PWI LED indicator that reports the module's power state and shows whether it is active or in Power-Down mode. The onboard pushbutton labelled as ON is routed to the RST pin on the mikroBUS™ and it represents the ignition button.
This Click Board™ uses the UART communication interface, but it is also left the option for the user to use other interfaces such as SPI and I2C if he wants to configure the module as SPI or I2C Master and write the library by himself. That can be achieved by populating the appropriate jumpers on the back of the board (J4 – J9), depending on the desired communication.
The LTE IoT 3 Click Board™ can be interfaced with both 3.3V and 5V MCUs because a proper logic voltage level conversion is performed by appropriate voltage level shifters, while the on-board LDOs are ensuring that the module is powered by recommended voltage levels.
SPECIFICATIONS
| Type | GPS+GNSS,LTE IoT |
| Applications | Can be used for small, battery-operated devices in remote locations such as smart meters, asset trackers, healthcare apps, wearables, smart city solutions, and many more. |
| On-board modules | The LTE IoT 3 Click Board™ is based on the EXS82-W, a Low Power Wide Area (LPWA) Wireless IoT module that allows connections to the LTE CAT-M1, CAT NB1/2, and 2G networks from Thales. |
| Key Features | Power saving modes, LTE bands that allows multiple regions coverage, dual SMA antenna connectors, USB connectivity, visual network and status indication, and more |
| Interface | UART,USB |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V,5V |
PINOUT DIAGRAM
This table shows how the pinout of the LTE IoT 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| SUSPEND Mode | SMI | 1 | AN | PWM | 16 | CS | SPI Chip Select |
| Ignition | ON | 2 | RST | INT | 15 | RTS | Ready to Send |
| Clear to Send | CTS | 3 | CS | RX | 14 | TX | UART TX |
| SPI Clock | SCK | 4 | SCK | TX | 13 | RX | UART RX |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | SCL | I2C Clock |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | SDA | I2C Data |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| LD2 | CHG | - | Charging LED Indicator |
| LD3 | PWI | - | PWI LED Indicator |
| LD4 | STAT | - | Status LED Indicator |
| LD5 | RX/TX | - | RX/TX LED Indicator |
| SW1 | ON | - | Power button: Power ON - hold pressed for 150ms, Power OFF - hold pressed for 1.5s |
| J1 | - | Populated 1.2.3 | Power Consumption Monitoring |
| J2,J3 | - | J2 populated, J3 not populated |
Active GNSS antenna power selection |
| J4 - J7 | - | not populated | SPI selection |
| J8, J9 | - | not populated | I2C selection |
| CN1 | GNSS | - | GNSS SMA Antenna Connector |
| CN2 | LTE | - | LTE SMA Antenna Connector |
| SIM | SIM | - | Nano SIM Card Holder |
LTE IOT 3 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.6 | - | 4.8 | V |
| GSM QUAD-Band Range | 850 | - | 1900 | mHz |
| LTE NBIOT 17-Band Range | 600 | - | 2100 | mHz |
| LTE Cat-M 17-Band Range | 700 | - | 2100 | mHz |
| Operating Temperature Range | -40 | - | +90 | °C |
Software Support
We provide a library for the LTE IoT 3 Click Board™on our LibStock page, as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Library Description
Library provides function for controlling device pins, and function for sendint AT commands over UART communication.
Key Functions
void lteiot3_send_cmd ( uint8_t *cmd_buf )- Function for sending commands to device.void lteiot3_set_pin_on ( uint8_t pin_state- Function for setting on pin state.
Example Description
The application is composed of three sections :
- System Initialization - Initialization of UART MODULE and additional pins
- Application Initialization - Turns on device and sends initial commands
- Application Task - Checks some device parameters by sending AT commands
void application_task ( )
{
lteiot3_send_cmd( &AT_CGATT[0] );
Delay_ms( 5000 );
log_buffer();
lteiot3_send_cmd( &AT_CEREG[0] );
Delay_ms( 5000 );
log_buffer();
lteiot3_send_cmd( &AT_CSQ[0] );
Delay_ms( 5000 );
log_buffer();
}
The full application code, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
- Conversions
- UART
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click Board™ or RS232 Click Board™ to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
MIKROSDK
The LTE IoT 3 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Carte à clic LTE IoT 3
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