UNIQUE ID Click

How does it work?

Unique ID Click is based on the DS2401, a guaranteed unique 64-bit ROM ID chip, from Analog Devices. The 64-bit ROM includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (01h). Its internal ROM is accessed via a single data line with a communication speed of up to 16.3Kbps. In perspective, multiple DS2401 devices can reside on a common 1-Wire net, with a built-in multidrop controller that ensures compatibility with other 1-Wire devices. The DS2401 features presence pulse acknowledgment when the reader first applies a voltage, where the power for reading and writing the device is derived from the data line itself.

The Unique ID Click uses a 1-Wire bus interface to communicate to the host MCU through one of the GPIOs (GP0, GP1) of the mikroBUS™ socket, selectable by the onboard GPIO SEL jumper. This protocol defines bus transactions regarding the bus state during specified time slots initiated on the falling edge of sync pulses from the host bus. All data is read and written the least significant bit first.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Specifications

Pinout diagram

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

Notes	Pin					Pin	Notes
1-Wire Data IN/OUT	GP1	1	AN	PWM	16	GP0	1-Wire Data IN/OUT
	NC	2	RST	INT	15	NC
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

UNIQUE ID Click electrical specifications

Software Support

We provide a library for the UNIQUE ID Click as well as a demo application (example), developed using Mikroe compilers. The demo can run on all the main Mikroe development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for UNIQUE ID Click driver.

Key functions

• uniqueid_read_id This function reads Family Code and Serial Number of device’s ROM memory.

Example Description

This example demonstrates the use of UNIQUE ID click board by reading and displaying Family Code and Serial Number on the UART Terminal.

void application_task ( void ) 
 { 
      uint8_t family_code; 
     uint8_t serial_num[ 6 ]; 

     if ( UNIQUEID_OK == uniqueid_read_id( &uniqueid, &family_code, &serial_num[ 0 ] ) ) 
     { 
         log_printf( &logger, "Family Code = 0x%.2Xrn", ( uint16_t ) family_code );  
         log_printf( &logger, "Serial Number = 0x%.2X%.2X%.2X%.2X%.2X%.2Xrn",  
                     ( uint16_t ) serial_num[ 0 ], ( uint16_t ) serial_num[ 1 ],  
                     ( uint16_t ) serial_num[ 2 ], ( uint16_t ) serial_num[ 3 ],  
                     ( uint16_t ) serial_num[ 4 ], ( uint16_t ) serial_num[ 5 ] );  
     }       

     Delay_ms( 1000 );  
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.UNIQUEID

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. A UART terminal is available in all Mikroe compilers.

mikroSDK

This Click board™ is supported with mikroSDK – Mikroe Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.