RAKwireless RAK4200 Manual de usuario
RAK4200(H) LoRa Module
WisDuo LoRa Module
Version V1.4 Apr2020
2
Table of Contents
1. Overview.....................................................................................................................3
1.1 Introduction .........................................................................................................3
1.2 Main Features.....................................................................................................3
2. RAK4200(H) LoRa Module.........................................................................................3
2.1 Overview.............................................................................................................3
2.2 Block Diagram.....................................................................................................4
2.3 Supported LoRaWAN bands ..............................................................................4
2.4 Pin Definition & Pin Out ......................................................................................5
2.5 Power Consumption ...........................................................................................7
2.6 Recommended Circuit ........................................................................................7
2.7 Mechanical Dimensions ......................................................................................9
2.8 Recommended Footprint ....................................................................................9
2.9 Recommended Reflow Profile ..........................................................................10
3. Revision History.......................................................................................................12
4. Document Summary ................................................................................................12
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1. Overview
1.1 Introduction
RAK4200(H) LoRa Module includes an STM32L071 MCU and an SX1276 LoRa chip. It
has Ultra-Low Power Consumption of 1.5uA in sleep mode and high LoRa output power
up to 19dBm max in work mode.
The module complies with LoRaWAN 1.0.2 protocols. It also supports Lora Point to Point
communications. The module is suitable for various applications that require long range
data acquisition and low power consumption.
1.2 Main Features
LoRa module for Smart City, Smart Agriculture, Smart Industry
Compact Form Factor: 15 x 15.5 x 2.5 mm
20 Pin Stamp Pad for PCB SMT mounting
I/O ports: UART/I2C/GPIO
Temperature range: -40°C to +85°C
Supply voltage: 2.0 ~ 3.6V
Frequency range: 863–870MHz (EU) / 902–928MHz (US)
Low-Power Wireless Systems with 7.8kHz to 500KHzBandwidth
Ultra-Low Power Consumption 1.5uA in sleep mode
Core: ARM 32-bit Cortex – M0+ with MPU
Up to128KB flash memory with ECC
20KB RAM
6KB of data EEPROM with ECC
2. RAK4200(H) LoRa Module
2.1 Overview
The figure below shows the top view of the RAK4200(H) LoRa Module. The dimensions
of the Module are 15 x 15.5 x 2.5 mm.
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Figure 1 | RAK4200 LoRa Module
2.2 Block Diagram
The Block diagram below shows the external interfaces of the RAK4200(H) LoRa Module.
Figure 2 | Block Diagram
2.3 Supported LoRaWAN bands
The RAK4200(H) LoRa Module supports the high LoRaWAN bands (refer to the Table 1)
Module
Region
Frequency (MHz)
RAK4200(H)
Indian
IN865
5
Europe
EU868
North America
US915
Australia
AU915
Korea
KR920
Asia
AS923
Table 1 | Operating Frequencies
2.4 Pin Definition & Pin Out
The figure below shows the pinout of the RAK4200(H) LoRa Module.
Figure 3 | Pinout
The table below shows the pin definition of the RAK4200(H) LoRa Module.
Pin
Name
I/O
Description
Alternate functions
1
UART2_RX
I
This UART port is used
as an AT command
port(STM32L071KBU6 PA3)
USART1_RX,
I2C1_SDA
2
UART2_TX
O
This UART port is used
as an AT command
port( (STM32L071KBU6
PA2)
MCO, USART1_TX,
I2C1_SCL, I2C3_SMBA
3
UART2_DE
I/O
GPIO (STM32L071KBU6
SPI1_MOSI,EVENTOUT,
6
PA1)
USART1_RTS_DE,
COMP2_OUT
4
UART1_TX
I/O
This UART port can be
used as an AT
command port and an
upgrade port or General
GPIO (STM32L071KBU6
PA9)
TIM21_CH1,TIM2_CH3,
USART2_TX,LPUART1_TX,
COMP2_OUT,COMP2_INM,
ADC_IN2
5
UART1_RX
I/O
This UART port can be
used as an AT
command port and an
upgrade port or General
GPIO (STM32L071KBU6
PA10)
TIM21_CH2,TIM2_CH4,
USART2_RX,LPUART1_RX,
COMP2_INP,ADC_IN3
6
UART1_DE
I/O
General GPIO or
UART(Reserved)
(STM32L071KBU6 PA12)
EVENTOUT,TIM2_CH2,USART2_RT
S_DE,
TIM21_ETR,
USART4_RX,COMP1_INP,
ADC_IN1
7
SWDIO
I/O
Programming
(STM32L071KBU6 PA13)
SWDIO, LPUART1_RX
8
SWCLK
I/O
Programming
(STM32L071KBU6 PA14)
SWCLK, USART2_TX,
LPUART1_TX
9
I2C_SCL
I/O
I2C interface
(STM32L071KBU6 PB6)
USART1_TX,I2C1_SCL,
LPTIM1_ETR,COMP2_INP
10
I2C_SDA
I/O
I2C interface
(STM32L071KBU6 PB7)
USART1_RX,I2C1_SDA,
LPTIM1_IN2,USART4_CTS,
COMP2_INP,VREF_PVD_IN
11
GND
-
Ground
-
12
RF
I/O
RF port (reserved), default RF
out by IPEX
-
13
GND
-
Ground
-
14
GND
-
Ground
-
15
SPI_CLK
I/O
Reserved PA5
SPI_CLK,leave it un-connect on
mainboard
16
SPI_MISO
I/O
Reserved PA6
SPI_MISO, leave it un-connect on
mainboard
17
SPI_MOSI
I/O
Reserved PA7
SPI_MOSI, leave it un-connect on
mainboard
18
MCU_NRST
I/O
MCU reset (STM32L071KBU6
NRST)
-
19
GND
-
Ground
Ground
20
VDD
-
DC3V3
Supply voltage 2.0~3.3V
7
Sleep Mode 1.5uA
Table 2 | Pin Definitions
2.5 Power Consumption
Current
Output Power
Frequency
868MHZ 19dBm 120mA on PA_BOOST
Receive Mode 15mA
Table 3 | Power Consumption
2.6 Recommended Circuit
RAK4200(H) module recommended circuit as below:
2.6.1 SWD programming Port
When programming with JLINK tool , it is need to connect 5 pins of 3V3,SWDIO,
SWCLK,GND and MCU_NRST. So it is better to leave these 5 pins for SWD
programming.
17 dBm 87mA on PA_BOOST
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2.6.2 UART port
There are two UART ports on RAK4200(H) module. UART2(pin1 and pin2) is used
as a command port and UART1(pin4 and pin5) is used both as a command and an
upgrade port. So it is better to connect UART2 to external MCU and UART1 is used
as a debug or upgrade port.
2.6.3 I2C port
Pin9 and Pin10 are recommended as I2C port. Just pull up with 10K resistance if use
it.
2.6.4 RF port
There are two types of RF port. One is with Ipex connector and another is PAD type.
For Ipex type just connect the antenna to the Ipex connector on the module directly.
For PAD type you can design the antenna as Ipex or SMA or Spring type.
2.6.5 SPI port
The SPI (pin15 ,pin16,pin17) has connected to the SX1276 in the internal of the
module.
So it is better not to use these 3 pins and just leave it un-connect on the mainboard.
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2.7 Mechanical Dimensions
The figure below shows the mechanical dimension of the RAK4200(H) LoRa Module.
Figure 4 | Mechanical Dimensions
2.8 Recommended Footprint
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Figure 5 | Recommended Footprint
2.9 Recommended Reflow Profile
Figure 6 | Recommended Reflow Profile
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