MIKROE-2048

Page 1 of 2 M-BUS RF click From MikroElektonika Documentation M-BUS RF click is a mikroBUS™ add-on board with a Telit ME70-169 RF wireless module. The radio operates at the unlicensed ISM frequency band between 169.400 and 169.475 MHz. The device is compliant with EN13757 part 4 2013. M-BUS RF click Features and usage notes The module has specified serial data rates of up to 115.2 Kbps and radio data rates of 2.4, 4.8 and 19.2 kbps. For security, the wireless signal has AES and NRZ encryption. Output power is from 125 mW to 631 mV (28dBm). According to the vendor’s data sheet, the module has wireless range of up to 20 km (an external antenna is required). Short for Meter-Bus, this protocol was designed for remote reading of gas or electricity meters in Europe, but it’s also suitable for alarm systems, illumination installations, heating control and more. Schematic also available in PDF (http://cdndocs.mikroe.com/images/9/93/M-BUS_RF_click_sch Devices that communicate with wireless M-Bus modules are classified as either meters or ‘other‘ devices. There is a total of six different M-Bus modes: ◾ ◾ ◾ ◾ ◾ ◾ Mode S ‘Stationary Mode T ‘frequent Transmit Mode R2 ‘frequent Receive Mode C ‘Compact Mode N ‘Narrowband VHF Mode F ‘Frequent receive and transmit M-BUS RF click IC/Module ME 70-169 (http://www.lte.com.tr/uploads/pdf/410.pdf) Interface CTS, TX, RX, RESET, RTS Power 3.3V supply Website www.mikroe.com/click/m-bus-rf (http://www.mikroe.com/click/m-bus-rf) The working of all six modes is explained in detail in the learn.mikroe.com article on M-Bus. Telit also provides a M-Bus (http://www.telit.com/fileadmin/user_upload/products/Downloads/sr-rf/me70169/Telit_Wireless_M-bus_2013_Part4_User_Guide_r13.pdf) guide which provides an Learn article explaining the MikroElektronika M-BUS library overview of the standard (http://learn.mikroe.com/wireless-m-bus/). M-BUS RF click communicates with the target MCU through the mikroBUS™ UART interface, with additional functionality provided by RESET, RTS, and CTS pins. The board is designed to use a 3.3 power supply only. Programming This example sets the M-Bus up for transmitting some data with a length field activated. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 #include #include #include #include "mbus_hw.h" sbit MBUS_RST sbit MBUS_RTS sbit MBUS_CTS at GPIOC_ODR.B2; at GPIOD_ODR.B13; at GPIOD_ODR.B10; bool my_receive_flag = false; //Extern for knowing when packet is received from another M-Bus RF click void system_setup( void ); void main() { //Local Declarations transmit_frame_t *transmit_frame; // Malloc space for the Transmit Frame MM_Init(); transmit_frame = Malloc( sizeof( transmit_frame_t ) ); // Setup GPIOs, communication pins, interrupts, e.t.c. system_setup(); //Initialize Conifguration Mode UART1_Write_Text( "Entering Config Mode\r\n" ); mbus_at_init(); // Set MBUS Mode UART1_Write_Text( "Setting MBUS Mode\r\n" ); check_status( mbus_set_mbus_mode( ROLE_N1_METER ) ); // Set RX / TX formats check_status( mbus_set_serial_tx_format( LENGTH_TX ) ); // TX Format must have Length.. so that sending / receiving works properly Page 2 of 2 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 //Sending some data... UART1_Write_Text( "\r\n\r\n Sending Frame Of Data...\r\n\r\n" ); // Set OP Mode check_status( mbus_op_init() ); //Send Frame sprintf( transmit_frame->data_field, "My Name is Engineer and I am %d Years Old.", 22 ); transmit_frame->length_field = strlen( transmit_frame->data_field ); mbus_send_frame( transmit_frame, 1 ); /**< Using length field for TX format, so not length needed */ } while ( 1 ); void system_setup( void ) { GPIO_Digital_Output( &GPIOC_BASE, _GPIO_PINMASK_2 } ); /**< Reset pin Output */ UART1_Init_Advanced( 9600, _UART_8_BIT_DATA, _UART_NOPARITY, _UART_ONE_STOPBIT, &_GPIO_MODULE_USART1_PA9_10 ); Delay_ms(300); /**< UART for Terminal */ UART3_Init_Advanced( 19200, _UART_8_BIT_DATA, _UART_NOPARITY, _UART_ONE_STOPBIT, &_GPIO_MODULE_USART3_PD89); Delay_ms(300); /**< UART for MBus */ mbus_init(); Delay_ms(300); /**< Initialize MBus HAL Layer */ RXNEIE_USART3_CR1_bit = 1; NVIC_IntEnable( IVT_INT_USART3 ); EnableInterrupts(); void LO_RX_ISR() iv IVT_INT_USART3 ics ICS_AUTO { mbus_rx_isr( USART3_DR ); } Code examples that demonstrate the usage of TK click with MikroElektronika hardware, written for mikroC for ARM, AVR, dsPIC, FT90x, PIC and PIC32 are available on Libstock (http://libstock.mikroe.com/projects/view/1902/m-bus-click). Resources - Vendor’s data sheet (http://www.telit.com/fileadmin/user_upload/products/Downloads/sr-rf/me70-169/Telit_ME70-169_Datasheet.pdf) - Vendor’s User guide (http://www.telit.com/fileadmin/user_upload/products/Downloads/sr-rf/me70-169/Telit_ME70_169_RF_module_User_Guide_r4.pdf) - M-BUS library hosted on Libstock (http://libstock.mikroe.com/projects/view/1902/m-bus-click) - Learn article explaining the MikroElektronika M-BUS library (http://learn.mikroe.com/wireless-m-bus/) - mikroBUS™ standard specifications (http://download.mikroe.com/documents/standards/mikrobus/mikrobus-standard-specification-v200.pdf) http://docs.mikroe.com/M-BUS_RF_click 9/15/2016