Enjoy high-quality audio and data transfer without limitations
A
A
Hardware Overview
How does it work?
BLE 12 Click is based on the BM832A, a highly flexible, ultra-low power Bluetooth module that provides BLE connectivity for any embedded application from Fanstel. The BM832A module is based on the Nordic nRF52 SoC, which integrates a 64MHz, 32bit ARM Cortex M4 processor with a floating-point unit (FPU) and a 2.4GHz multiprotocol radio (supporting Bluetooth 5.0 and an integrated PCB trace antenna), featuring -96dBm RX sensitivity (depending on data rate), alongside 192kB Flash memory and 24kB RAM. BLE 12 Click allows UART and SPI interfaces, with commonly used UART RX and TX pins as its default communication protocol for exchanging AT commands operating at 115200 bps by default configuration, to transmit and exchange data with the host MCU. The selection can be made by positioning SMD jumpers labeled COMM SEL in an appropriate position. Note that all the jumpers' positions must be on the same side, or the Click
board™ may become unresponsive. The CMD pin routed on the PWM pin of the mikroBUS™ represents the communication-activation feature. A high logic state of the CMD pin allows the module to communicate with the MCU, while a low state allows data to be sent to a far-end device (for example, a smartphone) transparently. With the selected UART interface, power consumption can be reduced by sending the command "AT+STOP". The CS pin must be set to a low logic state for 200μs or more to wake up the UART interface. Besides, it has an additional data-ready signal, labeled as REQ and routed on the INT pin of the mikroBUS™ socket, indicating that new data is ready for the host. This Click board™ comes with worldwide regulatory certifications and offers enhanced performance, security, and reliability to support IoT products running on Bluetooth networks. Besides, at the center of the BLE 12 Click, an additional unpopulated header offers full
support for debugging and programming capabilities. With this header, the user can use a Serial Wire Debug interface for programming and debugging, available through the SWD interface pins (SWDIO, SWCLK, and SWO). In addition to the appropriate interfaces, this Click board™ also has some additional features. A Reset button routed to the RST pin on the mikroBUS™ socket puts the module into a Reset state, while the two additional LED indicators, yellow and red LEDs labeled as LED1 and LED2, can be used for optional user-configurable visual indication. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
Features overview
Development board
PIC32MZ Clicker is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit PIC32MZ microcontroller with FPU from Microchip, a USB connector, LED indicators, buttons, a mikroProg connector, and a header for interfacing with external electronics. Thanks to its compact design with clear and easy-recognizable silkscreen markings, it provides a fluid and immersive working experience, allowing access anywhere and under
any circumstances. Each part of the PIC32MZ Clicker development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the PIC32MZ Clicker programming method, using USB HID mikroBootloader, or through an external mikroProg connector for PIC, dsPIC, or PIC32 programmer, the Clicker board also includes a clean and regulated power supply module for the development kit. The USB Micro-B connection can provide up to 500mA of current, which is more than enough to operate all onboard
and additional modules. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several buttons and LED indicators. PIC32MZ Clicker is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC32
MCU Memory (KB)
1024
Silicon Vendor
Microchip
Pin count
64
RAM (Bytes)
524288
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Track your results in real time
Application Output
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for BLE 12 Click driver.
Key functions:
ble12_set_device_name
- BLE 12 set device name functionble12_set_op_mode
- BLE 12 set operating mode functionble12_send_cmd
- BLE 12 sends the command function
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 BLE 12 Click Example.
*
* # Description
* This example reads and processes data from BLE 12 Click board™.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes UART driver and logs UART.
* After driver initialization, the app performs a wake-up module,
* enters command mode, sets the device name and advertising time interval,
* and disconnects all connections.
* After that, the blinking of the yellow LED Indicates
* that the BLE 12 Click board™ is ready for connection.
* After establishing the connection, the yellow LED is turned on.
*
* ## Application Task
* This example demonstrates the use of the BLE 12 Click board™.
* Reads the received data and parses it.
* Results are being sent to the Usart Terminal, where you can track their changes.
*
* ## Additional Function
* - static void ble12_clear_app_buf ( void )
* - static err_t ble12_process ( void )
*
* @note
* We have used the Serial Bluetooth Terminal Android application for the test
* and you can find it at the link:
* https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal
*
* @author Nenad Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "ble12.h"
#define PROCESS_BUFFER_SIZE 200
#define RSP_TIMEOUT 100
static ble12_t ble12;
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 BLE 12 clearing application buffer.
* @details This function clears memory of application buffer and reset it's length and counter.
* @note None.
*/
static void ble12_clear_app_buf ( void );
/**
* @brief BLE 12 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 err_t ble12_process ( void );
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
ble12_cfg_t ble12_cfg; /**< Click config object. */
/**
* 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.
ble12_cfg_setup( &ble12_cfg );
BLE12_MAP_MIKROBUS( ble12_cfg, MIKROBUS_1 );
if ( UART_ERROR == ble12_init( &ble12, &ble12_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BLE12_ERROR == ble12_default_cfg ( &ble12 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
app_buf_len = 0;
app_buf_cnt = 0;
Delay_ms( 100 );
log_info( &logger, " Application Task " );
log_printf( &logger, "-------------------------------\r\n" );
log_printf( &logger, "\t BLE 12 Click\r\n" );
log_printf( &logger, "-------------------------------\r\n" );
log_printf( &logger, "\t Command mode\r\n" );
ble12_set_op_mode( &ble12, BLE12_OP_MODE_CMD );
Delay_ms( 100 );
ble12_event_startup( &ble12 );
Delay_ms( 100 );
ble12_set_led_state( &ble12, BLE12_LED_RED, BLE12_LED_OFF );
ble12_set_led_state( &ble12, BLE12_LED_YELLOW, BLE12_LED_OFF );
Delay_ms( 100 );
log_printf( &logger, "- - - - - - - - - - - - - - - -\r\n" );
log_printf( &logger, "> Set device name:" );
log_printf( &logger, " BLE 12 Click\r\n" );
ble12_set_device_name( &ble12, "BLE 12 Click" );
Delay_ms( 100 );
log_printf( &logger, "> Set Adv. Interval: 99 ms\r\n" );
ble12_set_adv_interval( &ble12, "0099" );
Delay_ms( 100 );
log_printf( &logger, "> Disconnect all connections\r\n" );
ble12_disconnect( &ble12 );
Delay_ms( 100 );
log_printf( &logger, "-------------------------------\r\n" );
log_printf( &logger, " Please connect your device\r\n" );
do
{
ble12_process();
ble12_set_led_state( &ble12, BLE12_LED_YELLOW, BLE12_LED_ON );
Delay_ms( 50 );
ble12_set_led_state( &ble12, BLE12_LED_YELLOW, BLE12_LED_OFF );
Delay_ms( 50 );
}
while ( !strstr( app_buf, BLE12_EVT_CONNECTED ) );
Delay_ms( 100 );
ble12_set_led_state( &ble12, BLE12_LED_RED, BLE12_LED_OFF );
ble12_set_led_state( &ble12, BLE12_LED_YELLOW, BLE12_LED_ON );
log_printf( &logger, "- - - - - - - - - - - - - - - -\r\n" );
log_printf( &logger, "\tDevice connected\r\n" );
Delay_ms( 100 );
ble12_set_op_mode( &ble12, BLE12_OP_MODE_DATA );
log_printf( &logger, "-------------------------------\r\n" );
log_printf( &logger, "\t Data mode\r\n" );
log_printf( &logger, "- - - - - - - - - - - - - - - -\r\n" );
Delay_ms( 100 );
ble12_process();
ble12_clear_app_buf( );
Delay_ms( 100 );
}
void application_task ( void )
{
ble12_process();
if ( app_buf_len > 0 )
{
log_printf( &logger, "%s", app_buf );
ble12_clear_app_buf( );
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
static void ble12_clear_app_buf ( void )
{
memset( app_buf, 0, app_buf_len );
app_buf_len = 0;
app_buf_cnt = 0;
}
static err_t ble12_process ( void )
{
int32_t rx_size;
char rx_buff[ PROCESS_BUFFER_SIZE ] = { 0 };
rx_size = ble12_generic_read( &ble12, rx_buff, PROCESS_BUFFER_SIZE );
if ( rx_size > 0 )
{
int32_t buf_cnt = 0;
if ( app_buf_len + rx_size >= PROCESS_BUFFER_SIZE )
{
ble12_clear_app_buf( );
return BLE12_ERROR;
}
else
{
buf_cnt = app_buf_len;
app_buf_len += rx_size;
}
for ( int32_t rx_cnt = 0; rx_cnt < rx_size; rx_cnt++ )
{
if ( ( rx_buff[ rx_cnt ] != 0 ) && ( rx_buff[ rx_cnt ] != 0x2B ) )
{
app_buf[ ( buf_cnt + rx_cnt ) ] = rx_buff[ rx_cnt ];
}
else
{
app_buf_len--;
buf_cnt--;
}
}
return BLE12_OK;
}
return BLE12_ERROR;
}
// ------------------------------------------------------------------------ END