Next Skywire click

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  • MIKROE-2405
  • MIKROE-2405
Skywire™ click  is an adapter click, which hosts  NimbeLink/Skywire™ cellular modems...more
Product information "Next Skywire click"

Skywire™ click is an adapter click, which hosts NimbeLink/Skywire™ cellular modems (using stacking headers) to MikroElektronika development boards. It carries the MCP1826 low dropout regulator from Microchip. Skywire™ click is designed to run either on 3.3V or 5V power supply. The click communicates with the target MCU over UART interface, and the following mikroBUS™ pins: PWM, AN, INT, RST, CS.

NOTE: the Skywire™ modem and the Thermo 3 click are not included in this offer.

Additional mikroBUS™ socket

Skywire™ click has the capability to host an additional mini sized click board™. It also has its own power supply to make the needed voltage for the modules.

Skywire cellular modems

Skywire™ cellular modems are the smallest on the market today. This product family from NimbeLink covers everything from 2G and 3G to LTE. They all share the same footprint and pinout, and are flexible for implementation.


Type Adapter
On-board modules MCP1826 LDO regulator
Key Features Additional socket for mini sized click board™, MCP1826 LDO regulator, 3.3V or 5V power supply
Key Benefits Adapts Nimbelink/Skywire modules with MikroElektronika development systems
Interface UART,GPIO
Input Voltage 3.3V or 5V
Compatibility mikroBUS
Click board size L (57.15 x 25.4 mm)

Pinout diagram

This table shows how the pinout on Skywire click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.pngPinNotes
Enable EN 1 AN PWM 16 CTS Clear To Send
Request To Send RTS 3 CS TX 14 TX UART transmit
  NC 4 SCK RX 13 RX UART receive
  NC 5 MISO SCL 12 NC  
  NC 6 MOSI SDA 11 NC  
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

Jumpers and settings

The following table describes the functions of the onboard jumpers.

DesignatorNameDefault PositionDefault OptionDescription
JP1 PWR.SEL. Left 3.3V Power Supply Voltage Selection 3.3V/5V, left position 3.3V, center position 5V
ADC1 ADC1 Populated 3.3V Connects ADC1 pin of the modem to the mikroBUS pin


Code examples for Skywire click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet starts the main function in the Skywire application.

This is a simple main function, which excepts a call and replies with an SMS to caller. The content of the SMS is the current temperature measurement in degrees Celsius.

01: void main()
02: {
03:     measure_f = false;
04:     system_init();
05:     skywire_power_on();
06:     at_init( rsp_handler, UART3_Write, buffer, sizeof( buffer ) );
07:     at_cmd_save( "+CLCC", 1000, NULL, NULL, NULL, callerid_handler );           // Assigning caller ID handler
08:     at_cmd_single( "AT" );
09:     at_cmd_single( "AT+CSCS="GSM"" );
10:     at_cmd_single( "AT+CMGF=1" );
11:     while( 1 )
12:     {
13:         at_process();
15:         if( measure_f )
16:         {
17:             measure_temp();
18:             at_cmd_single( "AT+CLCC" );
19:             at_cmd_single( "ATH" );
20:             Delay_ms( 2000 );                                                   // Delay needed after ATH
21:             reply_to_caller();
22:             measure_f = false;
23:         }
24:     }
25: }


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