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Author: MIKROE
Last Updated: 2024-10-31
Package Version: 2.1.0.15
mikroSDK Library: 2.0.0.0
Category: Sub-1 GHz Transceivers
Downloaded: 166 times
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License: MIT license
OOK RX Click is a wireless receiver that operates at the frequency of 433MHz (sub-GHz). This device allows realization of a simple, low-speed wireless ad hoc communication network between a receiver and compatible transmitter.
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OOK RX Click is a wireless receiver that operates at the frequency of 433MHz (sub-GHz). This device allows realization of a simple, low-speed wireless ad hoc communication network between a receiver and compatible transmitter.
We provide a library for the OOK RX Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for OOK RX Click driver.
ookrx_cfg_setup
Config Object Initialization function.
void ookrx_cfg_setup ( ookrx_cfg_t *cfg );
ookrx_init
Initialization function.
err_t ookrx_init ( ookrx_t *ctx, ookrx_cfg_t *cfg );
ookrx_enable_device
This function enables device by setting the EN pin to high logic state.
void ookrx_enable_device ( ookrx_t *ctx );
ookrx_wait_ready
This function waits for all training bytes to arrive which indicates data ready.
static void ookrx_wait_ready ( ookrx_t *ctx );
ookrx_read_packet
This function reads data packet and stores it in a packet_buf only if the OOKRX_PREAMBLE bytes are received successfully.
static uint8_t ookrx_read_packet ( ookrx_t *ctx );
This example demonstrates the use of OOK RX Click board by reading and parsing packet messages received from the transmitter.
The demo application is composed of two sections :
Initializes the driver and enables the device and squelch mode.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
ookrx_cfg_t ookrx_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.
ookrx_cfg_setup( &ookrx_cfg );
OOKRX_MAP_MIKROBUS( ookrx_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == ookrx_init( &ookrx, &ookrx_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
ookrx_enable_squelch ( &ookrx );
ookrx_enable_device ( &ookrx );
log_info( &logger, " Application Task " );
}
Waits for a data ready indication, then reads all packet data, verifies the CRC bytes in a packet, and displays its data as well as the RSSI value on the USB UART.
void application_task ( void )
{
static float rssi_v = 0;
static uint8_t packet_len = 0;
static uint8_t msg_cnt = 0;
static uint16_t crc = 0;
log_printf( &logger, "\r\n Waiting for data ready...\r\n" );
ookrx_wait_ready ( &ookrx );
packet_len = ookrx_read_packet ( &ookrx );
if ( packet_len )
{
ookrx_read_rssi_voltage ( &ookrx, &rssi_v );
crc = ( ( uint16_t ) packet_buf[ packet_len - 2 ] << 8 ) | packet_buf[ packet_len - 1 ];
if ( crc == micrftx2_calculate_crc16 ( packet_buf, packet_len - 2 ) )
{
log_printf( &logger, " Received message: " );
for ( msg_cnt = 0; msg_cnt < packet_buf[ 2 ]; msg_cnt++ )
{
log_printf( &logger, "%c", ( uint16_t ) packet_buf[ msg_cnt + 3 ] );
}
log_printf( &logger, "\r\n RSSI: %.1f dBm\r\n", OOKRX_RSSI_V_TO_DBM ( rssi_v ) );
}
}
Delay_ms ( 100 );
}
The OOK TX Click board is a compatible transmitter for the OOK RX Click. Here are a few steps for troubleshooting if you are experiencing issues running this example:
- Check the MCU clock configuration, use an external oscillator instead of the MCU's internal one for better accuracy on manchester data rate delay.
- Measure the actual data rate on the data line and adjust the OOKRX_MAN_BIT_LEN_US value accordingly.
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
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. UART terminal is available in all MikroElektronika compilers.