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Experience wireless freedom like never before with SP1ML and PIC18F97J94

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SPIRIT Click with Fusion for PIC v8

Published Nov 02, 2023

Click board™


Development board

Fusion for PIC v8


NECTO Studio



Our 868MHz ultra-low-power RF module makes long-distance wireless communication effortless, ensuring robust connections for remote monitoring and control systems.



Hardware Overview

How does it work?

Spirit Click is based on the SP1ML, a Spirit1 868MHz low-power RF module with an integrated microcontroller from STMicroelectronics. Besides the STM32L1 MCU, the module integrates a filter/balun and a chip antenna. Over the chip antenna, it achieves output power up to +11.6dBm and uses modulation schemes 2-FSK, GFSK, GMSK, OOK, and ASK. Its compact size, integrated design, all necessary FCC modular approvals, and CE compliance reduce time-to-market, making it an ideal choice for wireless applications. The data rates depend on the used modulation. The UART host interface allows simple connection to an external microcontroller with standard firmware, allowing AT commands to facilitate RF configuration, data transmission, and reception using simple point-to-point communication. It can also switch the module between the command and operating modes. In addition, the serial wire

debug interface (SWD) is also available, as the Spirit Click and the SP1ML module support custom module firmware. The 5-pin header, aside from the module, can also be used for debugging purposes. Additional RXTX LED status indicator shows when the data is sent or received. The command mode allows module configuration and status interrogation using an extended AT-style command set. In operating mode, the module serves its primary purpose as a wireless transceiver. Following power-up or reset, the module starts in operating mode with the current configuration loaded from EEPROM. In operating mode, data received from the host on the UART interface will be wirelessly transmitted by the Spirit1 radio using the current configuration settings for frequency, data rate, modulation, and output power. Conversely, any data received by Spirit1 that meets the configured filtering criteria

will be output to the UART interface. In command mode, the module will accept commands to configure module settings and interrogate module status. Spirit Click uses a standard UART interface to communicate with the host MCU, supporting baud rates from 9600 up to 250000bps, while 38400bps is the default value. You can reset the Spirit Click over the RST pin and shut it down over the SHD pin. To change the operating mode, there is the CMD pin. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the LOGIC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used for further development.

SPIRIT Click top side image
SPIRIT Click bottom side image

Features overview

Development board

Fusion for PIC v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different PIC, dsPIC, PIC24, and PIC32 MCUs regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for PIC v8 provides a fluid and immersive working experience, allowing access anywhere and under any

circumstances at any time. Each part of the Fusion for PIC v8 development board contains the components necessary for the most efficient operation of the same board. In addition to the advanced integrated CODEGRIP programmer/debugger module, which offers many valuable programming/debugging options and seamless integration with the Mikroe software environment, the board also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector. Communication options such as USB-UART, USB

HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet are also included, including the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options (graphical and character-based LCD). Fusion for PIC v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

Fusion for PIC v8 horizontal image

Microcontroller Overview

MCU Card / MCU



8th Generation



MCU Memory (KB)


Silicon Vendor


Pin count


RAM (Bytes)


Used MCU Pins

mikroBUS™ mapper

Command Mode
Power Supply
Power Supply

Take a closer look


SPIRIT Click Schematic schematic

Step by step

Project assembly

Fusion for PIC v8 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Fusion for PIC v8 as your development board.

Fusion for PIC v8 front image hardware assembly
Buck 22 Click front image hardware assembly
SiBRAIN for PIC32MZ1024EFK144 front image hardware assembly
v8 SiBRAIN MB 1 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
Necto image step 7 hardware assembly
Necto image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.

UART Application Output Step 1

Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.

UART Application Output Step 2

In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".

UART Application Output Step 3

The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

UART Application Output Step 4

Software Support

Library Description

This library contains API for SPIRIT Click driver.

Key functions:

  • spirit_power_module - Function for power mode of SPIRIT click.

  • spirit_reset - Function for reseting SPIRIT click.

  • spirit_set_mode - Function for setting mode of SPIRIT click.

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

 * @file main.c
 * @brief SPIRIT Click Example.
 * # Description
 * This example reads and processes data from SPIRIT click.
 * The demo application is composed of two sections :
 * ## Application Init
 * Initializes the driver and configures the click board.
 * ## Application Task
 * Depending on the selected mode, it reads all the received data or sends the desired message 
 * every 2 seconds.
 * ## Additional Function
 * - static err_t spirit_process ( void ) - The general process of collecting the received data.
 * @author Jelena Milosavljevic
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "spirit.h"

#define PROCESS_COUNTER     20

#define TEXT_TO_SEND           "MikroE - SPIRIT click board\r\n"


static spirit_t spirit;
static log_t logger;

static char app_buf[ PROCESS_BUFFER_SIZE ] = { 0 };
static int32_t app_buf_len = 0;
static int32_t app_buf_cnt = 0;

 * @brief SPIRIT data reading function.
 * @details This function reads data from device and concatenates data to application buffer.
 * @return @li @c  0 - Read some data.
 *         @li @c -1 - Nothing is read.
 *         @li @c -2 - Application buffer overflow.
 * See #err_t definition for detailed explanation.
 * @note None.
static void spirit_process ( void );

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void ) 
    log_cfg_t log_cfg;
    spirit_cfg_t cfg;

     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    spirit_cfg_setup( &cfg );
    spirit_init( &spirit, &cfg );
    Delay_ms( 1000 );

    log_info( &logger, "---- Configuring the module ----" );
    spirit_power_module( &spirit, SPIRIT_MODULE_WAKE_UP );
    spirit_reset( &spirit );
    spirit_set_mode( &spirit, SPIRIT_OPERATING_MODE );
    Delay_ms( 1000 );
    log_printf( &logger, "COMMAND MODE\r\n" );
    spirit_send_cmd( &spirit, SPIRIT_CMD_ENTER_COMMAND_MODE );
    spirit_process( );
    log_printf( &logger, "FIRMWARE VERSION\r\n" );
    spirit_send_cmd( &spirit, SPIRIT_CMD_READ_MODULE_VERSION );
    spirit_process( );
    log_printf( &logger, "TXRX LED - OPEN DRAIN OUTPUT\r\n" );
    spirit_send_cmd_with_parameter( &spirit, SPIRIT_CMD_CFG_TXRX_LED, SPIRIT_PCFG_TXRXLED_OPEN_DRAIN );
    spirit_process( );
    log_printf( &logger, "STORE CONFIG\r\n" );
    spirit_send_cmd( &spirit, SPIRIT_CMD_STORE_CURRENT_CONFIG );
    spirit_process( );
    log_printf( &logger, "OPERATING MODE\r\n" );
    spirit_send_cmd( &spirit, SPIRIT_CMD_ENTER_OPERATING_MODE );
    spirit_process( );
    log_info( &logger, "---- The module has been configured ----" );
    log_info( &logger, "---- RECEIVER MODE ----" );
    log_info( &logger, "---- TRANSMITTER MODE ----" );
    Delay_ms( 1000 );

void application_task ( void ) {
    spirit_process( );
    spirit_generic_write( &spirit, TEXT_TO_SEND, strlen( TEXT_TO_SEND ) );
    log_info( &logger, "---- The message has been sent ----" );
    Delay_ms( 2000 );

void main ( void ) {
    application_init( );

    for ( ; ; ) {
        application_task( );

static void spirit_process ( void ) {
    int32_t rsp_size;
    char uart_rx_buffer[ PROCESS_BUFFER_SIZE ] = { 0 };
    uint8_t process_cnt = PROCESS_COUNTER;

    while( process_cnt != 0 ) {
        rsp_size = spirit_generic_read( &spirit, &uart_rx_buffer, PROCESS_BUFFER_SIZE );
        if ( rsp_size > 0 ) {  
            for ( uint8_t cnt = 0; cnt < rsp_size; cnt++ ) {
                log_printf( &logger, "%c", uart_rx_buffer[ cnt ] );
                if ( uart_rx_buffer[ cnt ] == '\n' ) {
                    log_printf( &logger, "-----------------------------\r\n" );
        else {
            // Process delay 
            Delay_100ms( );

// ------------------------------------------------------------------------ END

Additional Support