RAK4260 WisDuo Breakout Board Datasheet

Overview

Description

The RAK4260 Breakout Board is designed to provide easy access to the board's pins, simplifying development and testing. Its breakout board form factor transfers the RAK4260 stamp module pinout to 2.54 mm headers, making debugging more convenient for developers.

The board itself has the RAK4260 at its core, which is a module that utilizes the ATSAMR34J18B SIP. This high level of integration allows for outstanding performance: 860 nA in sleep mode and LoRa TX Power of up to 20 dBm.

A key feature of this Breakout Board is the ATECC608A Cryptographic Co-Processor, which provides secure hardware-based key storage. This sets the board apart from the RAK4200 and RAK4600, adding an extra layer of security to future-proof your platform.

The board complies with LoRaWAN 1.0.2 protocols. It also supports LoRa Point-to-Point (P2P)communication.

The board's low-power, long-range LoRa communication capabilities make it ideal for various IoT applications, including home automation, sensor networks, building automation, and personal area networks such as health and fitness sensors and monitors.

Features

LoRa module for Smart City, Smart Agriculture, Smart Industry
I/O ports: UART/I2C/SPI/ADC
Frequency range: 863–923 MHz (entire LoRa high band spectrum)
Low-Power Wireless Systems with 7.8 kHz to 500 kHz Bandwidth
LoRa Tx power up to 20 dBm
Ultra-Low Power Consumption 860 nA in sleep mode
Core: ARM 32-bit Cortex – M0+ with MPU
Up to 256 KB flash memory with ECC
32 KB RAM
6 KB of data EEPROM with ECC
ATECC608A cryptographic core
Supply voltage: 2.0 V ~ 3.6 V
Temperature range: -40° C ~ +85° C

Specifications

Overview

Figures 1 and 2 show the RAK4260 Breakout Board, highlighting the top and back views of the board, respectively.

Figure 1: RAK4260 Breakout Board Top View

Figure 1: RAK4260 Breakout Board Bottom View

Hardware

The hardware specification is categorized into five (5) parts. It discusses the interfacing, pinouts and its corresponding functions and diagrams. It also covers the RF and electrical parameters that include the tabular data of the functionalities and standard values of the RAK4260 Breakout Board.

Interfaces

SWD Programming Interface

When programming via a DAPLink tool, it is required to have all of the following four (4) pins connected to your DAPLink tool:

3V3
SWDIO
SWCLK
GND

NOTE

It is recommended to leave these pins exposed for programming purposes and avoid remapping them as GPIOs.

UART Port

There are two UART interfaces on the RAK4200 Breakout Board:

UART1 – the default interface
UART3 – reserved, can also act as GPIOs.

I2C Interface

I2C_SCL and I2C_SDA are connected to the ATECC608A crypto chip for the purpose of developing cryptographic applications: network end-point key management and exchange small message and PII data encryption, secure boot and protected download, ecosystem control, and anti-cloning.

RF Interface

J4 is soldered to the antenna connector. Depending on your choice it can come with either SMA or IPEX style connector. Make sure to select the one you need when ordering.

Pin Definition

Figure 1: RAK4260 Breakout Board Pinout

The tables below show the pin definition of the RAK4260 Breakout Board:

J5 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	UART3_RX	I	UART3_RX (ATSAMR34J18B PA18)	EIC/PTC/TC/AC/CCL/SERCOM1/SERCOM3
2	UART3_TX	O	UART3_TX (ATSAMR34J18B PA19)	EIC/PTC/TC/AC/CCL/SERCOM1/SERCOM3
3	GPIO	I/O	GPIO (ATSAMR34J18B PA06)	EIC/RSTC/ADC/PTC/OPAMP/TC/CCL/SERCOM0
4	GPIO	I/O	GPIO (ATSAMR34J18B PA07)	EIC/RSTC/ADC/OPAMP/TC/CCL/SERCOM0
5	GPIO	I/O	GPIO (ATSAMR34J18B PA08)	ADC/PTC/TC/CCL/SERCOM0/SERCOM2
6	GPIO	I/O	GPIO (ATSAMR34J18B PA09)	EIC/ADC/PTC/TC/CCL/SERCOM0/SERCOM2
7	SWDIO	I/O	Programming (ATSAMR34J18B PA30)	-
8	SWCLK	I/O	Programming (ATSAMR34J18B PA31)	-

J6 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	UART1_TX	O	UART1_RX (ATSAMR34J18B PA04)	EIC/RSTC/VREFB/ADC/AC/OPAMP/TC/CCL/SERCOM0
2	UART1_RX	I	UART1_RX (ATSAMR34J18B PA05)	EIC/RSTC/ADC/AC/OPAMP/TC/CCL/SERCOM0
3	GPIO	I/O	GPIO (ATSAMR34J18B PA14)	EIC/TC/GCLK/SERCOM2/SERCOM4
4	RST	-	MCU RESET	-
5	SPI_MISO	I/O	SPI Interface (ATSAMR34J18B PB02)	EIC/ADC/SERCOM5/TC/SUPC/CCL
6	SPI_CLK	I/O	SPI Interface (ATSAMR34J18B PB23)	EIC/SERCOM5/TC/GCLK/CCL
7	SPI_CS	I/O	SPI Interface (ATSAMR34J18B PA22)	EIC/PTC/TC/AC/CCL/SERCOM3/SERCOM5
8	SPI_MOSI	I/O	SPI Interface (ATSAMR34J18B PA23)	EIC/PTC/TC/AC/CCL/GCLK/SERCOM3/SERCOM5

J11 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	USB_N	I/O	USB Interface (ATSAMR34J18B PA24)	EIC/SERCOM3/SERCOM5/TC/USB_DM/CCL
2	USB_P	I/O	USB Interface (ATSAMR34J18B PA24)	EIC/SERCOM3/SERCOM5/TC/USB_DP/CCL

J12 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	I2C_SDA	I/O	I2C Interface (ATSAMR34J18B PA16)	EIC/PTC/TC/GCLK/CCL/SERCOM1/SERCOM3
2	I2C_SCL	I/O	I2C Interface (ATSAMR34J18B PA17)	EIC/PTC/TC/GCLK/CCL/SERCOM1/SERCOM3

J13 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	GND		Ground	GND
2	VDD		DC3V3	Supply voltage 2.0 V ~ 3.3 V

J14 Pin Definitions

Pin	Name	I/O	Description	Alternate Functions
1	GND		Ground	GND
2	VDD		DC3V3	Supply voltage 2.0 V ~ 3.3 V

RF Characteristics

Operating Frequencies

The RAK4260 Breakout Board supports the following LoRa bands:

Module	Region	Frequency (MHz)
RAK4260(H)	Russia	RU864
	India	IN865
	Europe	EU868
	North America	US915
	Australia	AU915
	Korea	KR920
	Asia	AS923

Electrical Characteristics

Power Consumption

Item	Power Consumption	Condition
Tx mode LoRa @20 dBm	126.3 mA	PA_BOOST V=3.3 V
Tx mode LoRa @17 dBm	95.6 mA	PA_BOOST V=3.3 V
Tx mode LoRa @14 dBm	33.1 mA (typical)	RFO_HF V=3.3 V
Rx mode LoRa @37.5 Kbps	13.6 mA	-
Sleep mode	860 nA	Backup Mode V = 3.3 V