IQRF click

IQRF click carries the DCTR-76DA RF transceiver, operating in the 868/916 MHz frequency. The click is designed to run on a 3.3V power supply. It communicates with the target microcontroller over SPI or UART interface, with additional functionality provided by the following pins on the mikroBUS™ line: AN, RST, PWM, INT.

Module features

DTCR-76DA is an RF transceiver operating in the 868/916 MHz license-free ISM (Industry, Scientific, and Medical) frequency band. Its highly integrated ready-to-use design containing MCU, RF circuitry, serial EEPROM and optional onboard antenna requires no external components.

How the click works

RF transceiver modules DCTR-72DA fit in the SIM connector. They are fully programmable under IQRF OS operating system and allow to utilize hardware profiles under DPA framework.

To upload application codes in DCTRs and configure DCTR parameters, CK-USB-04A kit is intended. When the application is uploaded to the IQRF it can be put in microBUS™ socket and communicate with it with MCU.

Specifications

Pinout diagram

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

Notes	Pin					Pin	Notes
Analog pin	ADC	1	AN	PWM	16	DIN	General I/O pin
General I/O pin	GPIO	2	RST	INT	15	INT	Interrupt
SPI enable	SPI_CS	3	CS	TX	14	TXD	UART transmit
SPI Clock	SPI_SCK	4	SCK	RX	13	RXD	UART receive
SPI Master Input Slave Output	SPI_MISO	5	MISO	SCL	12	NC
SPI Master Output Slave Input	SPI_MOSI	6	MOSI	SDA	11	NC
Power supply	+3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Programming

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

Code snippet

This code snippet contains receiver and transmitter code for IQRF click board working with Thermo K click. When in transmit mode, MCU reads the temperature from Thermo K and if a certain threshold has been reached, byte data is sent to IQRF board via UART communication. Then, IQRF is broadcasting that byte to every other IQRF within range. Every Other IQRF click board is receiving that byte via RF communication and sending data to his local MCU via UART. Every event is displayed on easyTFT.

01 while(1)
02   {
03     #ifdef __TX__
04     
05     status = &Read_MCP9600_Status;
06     Temp_Data_Ready = (status & 0x40);
07 
08     temp =  Read_Temperature();
09     
10     if (Temp_Data_Ready)
11     {                                       // Check is Temperature Data ready
12       sprintf(txt, "%2.1f  C", temp);       // Format Temperature Data and store it to txt
13       res = strcmp(txt,old_txt);            // Compare old_txt and txt
14 
15       if(res != 0)                          // If old_txt and txt are not equal
16       {                                                                         
17         updateLabel(txt, 135, 90, lab1);    // Write temperature value on display
18         strcpy(old_txt,txt);                // Copy txt to old_txt string array
19       }
20     }
21     
22     if (temp <= LOW_TEMP_POINT)             // If low temperature point has been reached
23     {
24      if (!low_point_reached)
25      {
26       UART3_Write_Text("L");                // Send byte via UART
27      }
28      low_point_reached = true;
29        
30     }
31     else if (temp >= HIGH_TEMP_POINT)       // If high temperature point has been reached
32     {
33      if(!high_point_reached)
34      {
35       UART3_Write_Text("H");                // Send byte via UART                                 
36      }
37      high_point_reached = true;
38 
39     }
40     else
41     {
42      low_point_reached = false;
43      high_point_reached = false;
44     }
45     Delay_ms(500);
46   #endif
47   
48   #ifdef __RX__
49 
50     TFT_Set_Font(&HandelGothic_BT21x22_Regular, CL_BLACK, FO_HORIZONTAL);
51 
52     // Writing warnings on display
53     if(high_point_reached)
54     {
55      TFT_Set_Font(&HandelGothic_BT21x22_Regular, CL_RED, FO_HORIZONTAL);
56      high_point_reached = false;
57      TFT_Write_Text("HIGH ", 130, 100);
58      Delay_ms(2000);
59      TFT_Set_Font(&HandelGothic_BT21x22_Regular, CL_WHITE, FO_HORIZONTAL);
60      TFT_Write_Text("HIGH ", 130, 100);
61     }
62     if(low_point_reached)
63     {
64      TFT_Set_Font(&HandelGothic_BT21x22_Regular, CL_BLUE, FO_HORIZONTAL);
65      low_point_reached = false;
66      TFT_Write_Text("LOW", 130, 100);
67      Delay_ms(2000);
68      TFT_Set_Font(&HandelGothic_BT21x22_Regular, CL_WHITE, FO_HORIZONTAL);
69      TFT_Write_Text("LOW ", 130, 100);
70     }
71   #endif
72   }
73 
74 }

Downloads

 DCTR-76DA datasheet

 LibStock: IQRF click library 

 IQRF click schematic