RAK3212 WisDuo LoRaWAN + BLE + WiFi Breakout Board Datasheet

Overview

Description

The RAK3212 is a breakout board featuring the RAK3112 module, which combines the Espressif ESP32-S3 MCU with a Semtech SX1262 LoRa transceiver. This low-power, long-range module supports LoRaWAN, BLE, and WiFi, making it ideal for a wide range of IoT applications such as home automation, sensor networks, building automation.

Features

• Based on RAK3112 (ESP32-S3 MCU + SX1262 LoRa transceiver)
• Provides all RAK3112 pins via header
• MCU: Espressif ESP32-S3
  • Xtensa® 32-bit LX7 dual-core microprocessor
  • 16 MB Flash
  • 512 kB SRAM
  • 512 kB RAM
  • 8 MB PSRAM
  • 16 kB RTC SRAM
• LoRa transceiver: Semtech SX1262
  • 863-928 MHz, LoRa/LoRaWAN support
• LoRaWAN 1.0.2 compliant (BasicModem support in preparation)
• Supported bands: IN865, EU868, AU915, US915, KR920, RU864, and AS923-1/2/3/4
• LoRaWAN Activation: OTAA/ABP
• LoRa Point-to-Point (P2P) communication
• BLE 5.0 support
• WiFi support
• Custom firmware using Arduino
• I/O ports: UART/I2C/SPI/ADC/GPIO
• Long-range: greater than 10 km with optimized antenna
• Supply Voltage: 3.0 V~3.6 V
• Temperature range: -40° C~65° C
• Dimensions: 29 mm x 40 mm x 4.28 mm

Specifications

Overview

Block Diagram

Figure 1: RAK3112 system block diagram

Hardware

The hardware specification is categorized into three parts: RF, electrical, and mechanical parameters. These include tables of functionalities and standard values for the RAK3112 WisDuo LPWAN Module.

Internal Connections Between ESP32-S3 MCU and SX1262 LoRa transceiver

SX1262	ESP32-S3	Function
SPI_NSS	GPIO7	SPI select
SPI_SCK	GPIO5	SPI clock
SPI_MISO	GPIO3	SPI Master in
SPI_MOSI	GPIO6	SPI Master out
NRESET	GPIO8	SX1262 reset
ANT_SW	GPIO4	SX1262 RF switch power
DIO1	GPIO47	SX1262 DIO1
BUSY	GPIO48	SX1262 BUSY

Interfaces

Interfaces
USB (Default for AT command and FW update)
2 x I2C
1 x UART
1 x SPI

Pin Definition

info

• GPIO33 to GPIO37 are on the stamp module’s pins, but with the 16 MB Flash chip, these GPIOs are not available.
• GPIO4 is used internally and not available.

Figure 1: RAK3212 Pin Headers

RAK3212 Pins

Pin Header J3

Pin No.	Name	Type	Description
1	5V	Power	5 V USB
2	5V	Power	5 V USB
3	GND	Power	GND
4	GND	Power	GND
5	GND	Power	GND
6	GPIO0 / Boot	I/O Boot	GPIO Bootloader force
7	GND	Power	GND
8	VCC	Power	3.3 V Supply
9	VCC	Power	3.3 V Supply

Pin Header J4

Pin No.	Name	Type	Description
1	GPIO18/I2C SCL	I2C Clock	I2C 2 SCL
2	GPIO21/AIN0	GPIO/Analog In	GPIO
3	GPIO38	GPIO	GPIO
4	GPIO39	GPIO	GPIO
5	GPIO40/I2C SCL	GPIO/I2C Clock	I2C 1 SCL
6	GPIO41	GPIO	GPIO
7	GPIO42	GPIO	GPIO
8	GPIO45	GPIO	GPIO
9	GPIO46	GPIO	GPIO

Pin Header J5

Pin No.	Name	Type	Description
1	GPIO1	GPIO	GPIO
2	GPIO2	GPIO	GPIO
3	GPIO9/I2C SDA	GPIO/I2C Data	I2C 1 SDA
4	GPIO10/SPI MISO	GPIO/SPI MISO	SPI MISO
5	GPIO11/SPI MOSI	GPIO/SPI MOSI	SPI MOSI
6	GPIO12/SPI CS	GPIO/SPI CS	SPI CS
7	GPIO13/SPI SCK	GPIO/SPI SCK	SPI SCK
8	GPIO14/AIN1	GPIO/Analog In	GPIO
9	GPIO17/I2C SDA	GPIO/I2C Data	I2C 2 SDA

Pin Header J6

Pin No.	Name	Type	Description
1	GPIO33	GPIO	N/A with 16 MB PSRAM
2	GPIO34	GPIO	N/A with 16 MB PSRAM
3	GPIO35	GPIO/I2C Data	N/A with 16 MB PSRAM
4	GPIO36	GPIO/SPI MISO	N/A with 16 MB PSRAM
5	GPIO37	GPIO/SPI MOSI	N/A with 16 MB PSRAM
6	GPIO4	NC	N/A
7	UART0_RX	GPIO/UART	UART 0 RX
8	UART0_TX	GPIO/UART	UART 0 TX
9	GND	Power	GND

RF Characteristics

LoRa Transceiver

The RAK3112 module supports many LoRaWAN bands as shown in the table below.

Module	Region	Frequency
RAK3112 (H)	Europe	EU868
	North America	US915
	Australia	AU915
	Korea	KR920
	Asia	AS923-1/2/3/4
	India	IN865
	Russia	RU864

TX Power

Transmitter output power, programmable up to +22 dBm.

RX Sensitivity

• -124 dBm for LoRa（BW = 125 kHz, SF = 7）
• -121 dBm for LoRa (BW = 250 kHz, SF = 7)
• -137 dBm for LoRa (BW = 125 kHz, SF = 12)
• -134 dBm for LoRa（BW = 250 kHz, SF = 12）

WiFi

Operating Frequencies

2412~2484 MHz

TX Power

Rate	Type (dBm)
802.11b, 1 Mbps	21.0
802.11b, 11 Mbps	21.0
802.11g, 6 Mbps	20.5
802.11g, 54 Mbps	19.0
802.11n, HT20, MCS0	19.5
802.11n, HT20, MCS7	19.0
802.11n, HT40, MCS0	19.5
802.11n, HT40, MCS7	18.0

RX Sensitivity

Rate	Type (dBm)
802.11b, 1 Mbps	-98.4
802.11b, 11 Mbps	-88.6
802.11g, 6 Mbps	-93.2
802.11g, 54 Mbps	-76.5
802.11n, HT20, MCS0	-92.6
802.11n, HT20, MCS7	-74.2
802.11n, HT40, MCS0	-90.0
802.11n, HT40, MCS7	-71.4

Bluetooth

Operating Frequencies

2402~2480 MHz

TX Power

Rate	Type (dBm)
BLE @1 Mbps	Programmable from -24 dBm to 20 dBm
BLE @2 Mbps	Programmable from -24 dBm to 20 dBm
BLE @125 Kbps	Programmable from -24 dBm to 20 dBm
BLE @500 Kbps	Programmable from -24 dBm to 20 dBm

RX Sensitivity

Rate	Type (dBm)
BLE @1 Mbps	-97.5
BLE @2 Mbps	-93.5
BLE @125 Kbps	-104.5
BLE @500 Kbps	-101

Electrical Characteristics

Operating Voltage

Feature	Minimum	Typical	Maximum	Unit
VDD	3.0	3.3	3.6	Volts (V)

Operating Current

The current consumption measurements are taken with a 3.3 V supply at an ambient temperature of 25° C.

Work Mode	Condition	Peak current	Unit
WiFi TX	802.11b, 1 Mbps, @21 dBm	340	mA
	802.11g, 54 Mbps, @19 dBm	291	mA
	802.11n, HT20, MCS7, @18.5 dBm	283	mA
	802.11n, HT40, MCS7, @18 dBm	286	mA
WiFi RX	802.11b/g/n, HT20	88	mA
	802.11n, HT40	91	mA
LoRa TX	+22 dBm@ 868 to 915Mhz	140	mA
	+20 dBm@ 868 to 915 Mhz	127.5	mA
	+17 dBm@ 868 to 915 Mhz	118	mA
	+14 dBm@ 868 to 915 Mhz	112	mA
LoRa RX	LoRa 125 kHz	25.46	mA

Sleep Current

The current consumption measurements are taken with a 3.3 V supply at 25° C of ambient temperature.

Feature	Condition	Maximum	Unit
Light-sleep	VDD_SPI and WiFi are powered down, and all GPIOs are high-impedance.	241	uA
Deep-sleep 1	RTC memory and RTC peripherals are powered up.	9	uA
Deep-sleep 2	RTC memory is powered up. RTC peripherals are powered down.	8	uA
Power off	CHIP_PU is set to low level. The chip is shut down.	2	uA

Mechanical Characteristics

Figure 1: RAK3212 board dimension

Environmental Characteristics

Operating Temperature

Feature	Minimum	Typical	Maximum	Unit
Operating Temperature	-40	25	65	° C

Storage Temperature

Feature	Minimum	Typical	Maximum	Unit
Storage Temperature	-40	-	85	° C

Schematic Diagram

Figure 1: RAK3212 schematic diagram

Firmware

The RAK3212 does not include pre-installed firmware. To use the module, you must develop your own application with the Arduino IDE and the Espressif BSP.

Example projects for LoRa, LoRaWAN, BLE, and WiFi are available in our GitHub repository. Additionally, a guide for firmware development can be found in the RAK3112 Quick Start Guide.