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LTE Cat.1-EU click is a Click board™ based on Thales Cinterion® ELS61 wireless module that delivers highly efficient Cat 1 LTE connectivity for M2M IoT solutions offering seamless fall back to 2G and 3G networks. The best in class solution enables M2M optimized speeds of 10Mbit/s download and 5Mbit/s uplink making it ideal for the vast number of M2M and industrial IoT applications that are not dependent on speed but that requires the longevity of LTE networks, while still providing 3G and 2G connectivity to ensure complete population and geographic coverage as LTE rolls out.

The LTE Cat.1-EU click is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.


LTE Cat.1-EU click is equipped with the ELS61 wireless module from Gemalto a Thales company. The main difference between these two modules are the supported frequency bands, compliant with the regulations for each region. A complete list of supported bands for each module, along with other relevant info about the module itself, can be found in the ELS61 series modem datasheet.

LTE Cat.1-EU click is a Click board™ based on Thales Cinterion® ELS61

The Cinterion ELS61 module that is featured on LTE Cat.1-EU click comes with a Java® embedded virtual machine leveraging a powerful ARM11 architecture which allows device manufacturers to utilize the massive to reduce complexity and speed application integration. The latest Java ME 3.2 client runtime platform reduces total cost of ownership (TCO) and time to market by sharing internal resources such as memory, a large existing code base and proven software building blocks. The module uses Multi MIDlet Java execution to simultaneously host and run multiple applications and protocols.

The UART bus of the ELS61 series module is connected to one side of the level shifter, while the other side (shifted) is connected to the respective mikroBUS™ UART pins. However, the ELS61 series module is designed as the traditional DCE device (Data Communication Equipment) offering the full UART pin count, including the hardware flow control pins (CTS, RTS). These pins are routed to the mikroBUS™ CS (RTS) and the INT pin (CTS) and can be used in the MCU software if the hardware flow control is needed.

An extended security concept with the latest TLS/SSL engine provides secure and reliable TCP/IP connectivity. Its sophisticated sandbox modeling and layered architectures simplify device management and allow simultaneous progress of network operator approvals and application code development for a shorter time to market. Cinterion LTE Cat.1 modules deliver long product lifespans up to seven years, efficient bandwidth and power utilization plus a feature set that meets the rigorous requirements of M2M IoT solutions including extended operating temperatures from -40°C to 85°C.

The LTE Cat.1-EU click ensures easy integration and a fast time to market for innovative solutions, and it also provides a dependable connectivity platform with the support needed for a fast time to market and a value you can trust.

Given all the possibilities these features offer, the LTE Cat.1-EU click can be used for various applications such as metering, tracking and tracing, remote surveillance, connected signs, fleet management and mHealth.


Applications Metering, tracking and tracing, remote surveillance, connected signs, fleet management and mHealth
On-board modules Cinterion® ELS61 Wireless Module from Gemalto
Radio Region Europe
Key Features Data rates of up to 10.2 Mb/s for download and up to 5.2 Mb/s for upload, real time clock with alarm functionality
Interface SPI,USB,UART,I2C
Compatibility mikroBUS
Click board size L (57.15 x 25.4 mm)
Input Voltage 3.3V,5V


This table shows how the pinout on LTE Cat.1-EU click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 1 AN PWM 16 CS Chip select
Reset RST 2 RST INT 15 RTS Request to send
Clear to send CS 3 CS RX 14 TX UART Transmit
SPI Clock SCK 4 SCK TX 13 RX UART Receive
SPI Slave Data OUT SDO 5 MISO SCL 12 SDA I2C Clock
SPI Slave 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


Label Name Default Description
LD1 PWR - Power LED Indicator
LD2 PWI - Power indication LED
LD3 STAT - Status LED
J1 J1 Disabled CS Enable/Disable Jumper
J2 J2 Disabled SCK Enable/Disable Jumper
J3 J3 Disabled MISO Enable/Disable Jumper
J4 J4 Disabled MOSI Enable/Disable Jumper
J5 J5 Disabled SCL Enable/Disable Jumper
J6 J6 Disabled SDA Enable/Disable Jumper

Note: Pins for SPI and I2C are not connected by default on mikroBUS™ since module is always acting as master which is not allowed for Click board™, but can be enabled by adding 0 ohm resistors to jumpers from J1 to J6 on the back side.


We provide a library for the LTE Cat1 Click on our LibStock page, as well as a demo application (example), developed using Gemalto a Thales companycompilers. The demo can run on all the main MikroElektronika development boards.

Library Description

The library covers all the necessary functions to control LTE Cat. 1 click board. Library carries generic command parser adopted for AT command based modules.

Key functions:

  • void ltecat1_cmd_single ( uint8_t *p_cmd ) - Sends provided command to the module function.
  • uint16_t ltecat1_set_handler( uint8_t *p_cmd, uint32_t timeout, ltecat1_handler_t p_handler ) - Handler assignation to the provied command function.
  • void ltecat1_module_power ( uint8_t power_state ) - Enables or disables module power function.

Examples description

The application is composed of three sections :

  • System Initialization - Initializes all necessary GPIO pins, UART used for the communcation with GSM module and UART used for infromation logging
  • Application Initialization - Initializes driver, power on module and sends few command for the default module configuration
  • Application Task - running in parallel core state machine and checks for call flag. If call detected parser will hang up call.
void application_task ( )
char rsp_com[ 50 ] = {0};

// GSM
ltecat1_process( );

if (0 != call_flag)
  • void ltecat1_default_handler( uint8_t *rsp, uint8_t *ev_args ) - Default handler.

The full application code, and ready to use projects can be found on our LibStock page.

Other mikroE Libraries used in the example:

  • UART
  • Conversion
  • String

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click 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.


This 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.

For more information about mikroSDK, visit the official page.

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