RAK3312 WisBlock LoRaWAN Module Datasheet
Overview
Description
The RAK3312 is a low-power, long-range LoRaWAN module based on the Espressif ESP32-S3 MCU with an integrated Semtech SX1262 LoRa transceiver. It supports triple wireless connectivity with LoRa, BLE, and WiFi, making it highly versatile for a wide range of IoT applications including home automation, sensor networks, and building automation.
The module supports custom firmware development using the Arduino framework and provides multiple I/O interfaces such as UART, I2C, SPI, ADC, and GPIO. It also features an MHF4 IPEX connector for seamless integration with external antennas.
Features
- Based on 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
- LoRa and LoRaWAN support
- Frequency support from 863 MHz to 928 MHz
- Compliant with the LoRaWAN 1.0.2 (LoRaWAN BasicModem support in preparation)
- Supported bands: IN865, EU868, AU915, US915, KR920, RU864, and AS923-1/2/3/4
- LoRaWAN Activation by 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
Specifications
Overview
The overview covers the RAK3312 board overview and the mounting mechanics of the board into the base board.
Figure 1: RAK3312 internal system block diagramMounting Sketch
The RAK3312 module is designed to work with the RAK19007 base board. Figure 2 shows how a RAK3312 module should be mounted on top of the RAK19007.
Figure 1: RAK3312 mounting sketchHardware
The hardware specifications are categorized into three parts: RF, electrical, and mechanical parameters. These include tables detailing functionalities and standard values for the RAK3312 WisBlock LPWAN Module.
Interfaces
| Interfaces |
|---|
| USB (Default for Serial log and FW update) |
| 2 x I2C |
| 1 x UART |
| 1 x SPI |
WisBlock Pin Assignments
| WisBlock Pin | ESP32 GPIO |
|---|---|
| WB_IO1 | GPIO21 |
| WB_IO2 | GPIO14 |
| WB_IO3 | GPIO41 |
| WB_IO4 | GPIO42 |
| WB_IO5 | GPIO38 |
| WB_IO6 | GPIO39 |
| WB_IO7 | NA |
| LED_GREEN | GPIO46 |
| LED_BLUE | GPIO45 |
| TXD0 | NA |
| RXD0 | NA |
| TXD1 | U0TXD/GPIO43 |
| RXD1 | U0RXD/GPIO44 |
| I2C1_SDA | GPIO9 |
| I2C1_SCL | GPIO40 |
| I2C2_SDA | GPIO17 |
| I2C2_SCL | GPIO18 |
| SPI_CS | GPIO12 |
| SPI_CLK | GPIO13 |
| SPI_MOSI | GPIO11 |
| SPI_MISO | GPIO10 |
ESP32-S3 SX1262 connections
| ESP32-S3 | SX1262 |
|---|---|
| GPIO7 | SX1262_SPI_NSS |
| GPIO5 | SX1262_SPI_SCK |
| GPIO6 | SX1262_SPI_MOSI |
| GPIO3 | SX1262_SPI_MISO |
| GPIO8 | SX1262_NRESET |
| GPIO48 | SX1262_BUSY |
| GPIO47 | SX1262_DIO1 |
| GPIO4 | SX1262_ANT_SW |
RF Characteristics
LoRa Transceiver
The RAK3312 WisBlock Core module supports various LoRaWAN bands, as listed in the table below. When purchasing a RAK3312 module, make sure to choose the correct variant for your region:
- RAK3312 (L) for low-frequency regions
- RAK3312 (H) for high-frequency regions
| Module | Region | Frequency |
|---|---|---|
| RAK3312 (L) | Europe | EU433 |
| China | CN470 | |
| RAK3312 (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 is 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 | Value |
|---|---|
| 802.11b, 1 Mbps | 21.0 dBm |
| 802.11b, 11 Mbps | 21.0 dBm |
| 802.11g, 6 Mbps | 20.5 dBm |
| 802.11g, 54 Mbps | 19.0 dBm |
| 802.11n, HT20, MCS0 | 19.5 dBm |
| 802.11n, HT20, MCS7 | 18.5 dBm |
| 802.11n, HT40, MCS0 | 19.5 dBm |
| 802.11n, HT40, MCS7 | 18.0 dBm |
- RX Sensitivity
| Rate | Value |
|---|---|
| 802.11b, 1 Mbps | –98.4 dBm |
| 802.11b, 11 Mbps | -88.6 dBm |
| 802.11g, 6 Mbps | –93.2 dBm |
| 802.11g, 54 Mbps | –76.5 dBm |
| 802.11n, HT20, MCS0 | –92.6 dBm |
| 802.11n, HT20, MCS7 | –74.2 dBm |
| 802.11n, HT40, MCS0 | –90.0 dBm |
| 802.11n, HT40, MCS7 | –71.4 dBm |
Bluetooth
-
Operating Frequencies: 2402~2480 MHz
-
TX Power
| Rate | Value |
|---|---|
| 802.11b, 1 Mbps | Programmable from -24 dBm to 20 dBm |
| 802.11b, 2 Mbps | Programmable from -24 dBm to 20 dBm |
| 802.11g, 125 kbps | Programmable from -24 dBm to 20 dBm |
| 802.11g, 500 Kbps | Programmable from -24 dBm to 20 dBm |
- RX Sensitivity
| Rate | Value |
|---|---|
| 802.11b, 1 Mbps | –97.5 dBm |
| 802.11b, 2 Mbps | –93.5 dBm |
| 802.11g, 125 Kbps | -94.0 dBm |
| 802.11g, 250 Kbps | -77.0 dBm |
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 @ 868~915 Mhz | 140 | mA |
| +20 dBm @ 868~915 Mhz | 127.5 | mA | |
| +17 dBm @ 868~915 Mhz | 118 | mA | |
| +14 dBm @ 868~915 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 |
|---|---|---|---|
| Lightsleep | VDD_SPI and WiFi are powered down, and all GPIOs are high-impedance | 241 | μA |
| Deepsleep 1 | RTC memory and RTC peripherals are powered up | 9 | μA |
| Deepsleep 2 | RTC memory is powered up. RTC peripherals are powered down | 8 | μA |
| Power off | CHIP_PU is set to low level. The chip is shut down | 2 | μA |
Schematic Diagram
Figure 1: RAK3312 SchematicWisConnector: The breakout module enables the RAK3312 stamp module's pinout to be accessed through the board-to-board WisConnector
WisConnector Pin Order: The WisConnector pin order is located in the bottom layer of the module.
Environmental Characteristics
Operating Temperature
| Feature | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Operating Temperature | -40 | 25 | 85 | ° C |
Storage Temperature
| Feature | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Storage Temperature | -40 | - | 85 | ° C |
Mechanical Characteristics
Board Dimensions
Figure 1: Mechanical DimensionsWisConnector PCB Layout
Figure 1: WisConnector PCB footprint and recommendationsFirmware
The RAK3312 does not come with default firmware. You have to develop your application based on the Arduino IDE, using the Espressif BSP. Examples of how to use LoRa, LoRaWAN, BLE, and WiFi are available in the GitHub repo.
For firmware development guide, refer to RAK3312 Quick Start Guide
