RAK4200(H) LoRa Module WisDuo LoRa Module Version V1.4 Apr2020 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 2 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: -40C to +85C Supply voltage: 2.0 ~ 3.6V Frequency range: 863870MHz (EU) / 902928MHz (US) Low-Power Wireless Systems with 7.8kHz to 500KHz Bandwidth 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. 3 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 RAK4200(H) Region Indian Frequency (MHz) IN865 4 Europe North America Australia Korea Asia EU868 US915 AU915 KR920 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 2 UART2_TX O This UART port is used as an AT command port(STM32L071KBU6 PA3) This UART port is used as an AT command port( (STM32L071KBU6 PA2) USART1_RX, I2C1_SDA MCO, USART1_TX, I2C1_SCL, I2C3_SMBA 3 UART2_DE I/O GPIO (STM32L071KBU6 SPI1_MOSI,EVENTOUT, 5 4 UART1_TX I/O 5 UART1_RX I/O PA1) USART1_RTS_DE, COMP2_OUT This UART port can be used as an AT command port and an upgrade port or General GPIO (STM32L071KBU6 PA9) This UART port can be used as an AT command port and an upgrade port or General GPIO (STM32L071KBU6 PA10) TIM21_CH1,TIM2_CH3, USART2_TX,LPUART1_TX, COMP2_OUT,COMP2_INM, ADC_IN2 TIM21_CH2,TIM2_CH4, USART2_RX,LPUART1_RX, COMP2_INP,ADC_IN3 EVENTOUT,TIM2_CH2,USART2_RT 6 UART1_DE I/O UART(Reserved) TIM21_ETR, General GPIO or S_DE,
(STM32L071KBU6 PA12) USART4_RX,COMP1_INP, ADC_IN1 7 8 9 SWDIO I/O SWDIO, LPUART1_RX Programming
(STM32L071KBU6 PA13) SWCLK I/O Programming SWCLK, USART2_TX,
(STM32L071KBU6 PA14) LPUART1_TX I2C_SCL I/O I2C interface USART1_TX,I2C1_SCL,
(STM32L071KBU6 PB6) LPTIM1_ETR,COMP2_INP 10 I2C_SDA I/O I2C interface
(STM32L071KBU6 PB7) 11 GND Ground 12 RF I/O RF port (reserved), default RF 13 14 GND GND out by IPEX Ground Ground 15 SPI_CLK I/O Reserved PA5 16 SPI_MISO I/O Reserved PA6 17 SPI_MOSI I/O Reserved PA7 USART1_RX,I2C1_SDA, LPTIM1_IN2,USART4_CTS, COMP2_INP,VREF_PVD_IN SPI_CLK,leave it un-connect on mainboard mainboard mainboard SPI_MISO, leave it un-connect on SPI_MOSI, leave it un-connect on
18 MCU_NRST I/O MCU reset (STM32L071KBU6 19 20 GND VDD NRST) Ground DC3V3 Ground Supply voltage 2.0~3.3V
6 Table 2 | Pin Definitions 2.5 Power Consumption Frequency 868MHZ Receive Mode Sleep Mode Output Power 19dBm 17 dBm Table 3 | Power Consumption 2.6 Recommended Circuit RAK4200(H) module recommended circuit as below:
Current 120mA on PA_BOOST 87mA on PA_BOOST 15mA 1.5uA 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. 7 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. Pin9 and Pin10 are recommended as I2C port. Just pull up with 10K resistance if use 2.6.3 I2C port it. 2.6.4 RF port 2.6.5 SPI port module. 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. The SPI (pin15 ,pin16,pin17) has connected to the SX1276 in the internal of the So it is better not to use these 3 pins and just leave it un-connect on the mainboard. 8 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 9 Figure 5 | Recommended Footprint 2.9 Recommended Reflow Profile Figure 6 | Recommended Reflow Profile 10 Standard conditions for reflow soldering:
Pre-heating Ramp (A) (Initial temperature: 150): 1~2.5/sec;
Soaking Time (T2) (150~180): 60sec~100sec;
Peak Temperature (G): 230~250;
Reflow Time (T3) (>220): 30~60 sec;
Ramp-up Rate (B): 0~2.5/ sec;
Ramp-down Rate (C): 1~3/ sec. Please contact us if you need technical support or need more information. Support center: https://forum.rakwireless.com/
Email us: info@rakwireless.com 11 Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC Caution:
Changes or modifications not expressly approved by the part responsible for compliance could void the user's authority to operate the equipment. FCC RF Radiation Exposure Statement Caution: This Transmitter must be installed to provide a separation distance of at least 20 cm from all persons. FCC Statement:
"This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help."
IC statement:
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. This equipment complies with Industry Canada radiation exposure limits set forth with a separation Cet metteur doit tre install pour fournir une distance de sparation d'au moins 20 cm de toute personne. The proposed FCC IC label format is to be placed on the module. If it is not visible when the module is installed into the system, Contains FCC ID: 2AF6B-RAK4200H, Contains IC: 25908- RAK4200H shall be placed on the outside of final host system. Labelling This radio transmitter [25908-RAK4200H] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list and same type greater than the maximum gain are strictly prohibited for use with this device. L'metteur [25908-RAK4200H] a t approuv par innovation, sciences et dveloppement conomique Canada pour fonctionner avec les types d'antennes numrs ci - dessous, avec les gains maximums admissibles indiqus ci - dessous. Les types d'antennes non inclus dans cette liste et les mmes types d'antennes dont le gain est suprieur au gain maximal ne doivent pas tre utiliss avec cet quipement. Antenna info RAKARG19 Model Manufacturer Antenna Gain Antenna Type Connector Type 5.1dBi Fiber Glass Antenna N-type male connector KRAKBJ2701C01C 2.3 dBi Dipole Antenna RPSMA connector Shenzhen RAKwireless Technology Co.,Ltd. 1 3. Revision History Revision Description 1.0 1.1 1.2 1.3 Initial version Revision of parameters Revision of parameters Add Recommended Circuit Chapter Date 2019-05-24 2019-10-24 2020-01-07 2020-03-17 4. Document Summary Prepared by Checked by Approved by Hairui Penn & Vladislav 12