CONFIDENTIALINFORMATION LoRa Module eLR-900H eLR-900H Product manual Ver 1.0 2022.05.17 1 PRODUCT : LoRa Module MODEL NAME : eLR-900H LoRa Module eLR-900H APPTOVAL REMARK Revision History eLR-900H-REV0.1 Initial release Date 2022.05.17 Designed Checked Approved eWBM Co., Ltd. DOCUMENT No. eLR-900H PAGE 1. Product Introduction The eLR-900H is a low-power LoRa (Long Range Wide-Area Network) module. 2 The data transfer rate is 980bps~21.0Kbps. This module is applicable to smart tracking, sensor and control solutions of various devices that support LoRa Module eLR-900H security systems. 2. Purpose This specification applies to "eWBM LoRa module". 3. eLR-920H Mechanical Dimensions Size Weight Interface 14.90mm(W) x 17.90mm(L) x 2.4mm(T) 1.0g LQFP-48 3.1 External Appearance Figure 3-1 eLR-900H Top Figure 3-2 eLR-900H Bottom 3 3.2 eLR-900H Module Dimension LoRa Module eLR-900H
(Unit : mm) 3.3 eLR-900H Foot Print 4 LoRa Module eLR-900H 4. Specifications of supported functions 1) LoRa Modulation technology. 2) Use the STM32WL MCU with security system. 3) eLR-900H support UART, SPI interface. 4) 902.3MHz ~914.9MHz ISM band operates. 5) Module outline dimension : 14.90 x 17.90 x Max. 2.40 (mm) 6) 32.768kHz and 32MHz crystal embedded. 7) LPUART Data Rate : 9600bps (AT Commend) 5. Electrical Characteristics 1) Recommended Operating Rating Parameter Operating Temperature Supply Voltage (VDD) 2) Current Consumption Min
-30 3.0 Max 70 3.6 Unit C V Mode Tx Mode Description Total Typ. Current at 3.3V Tx Mode Operating 96.0mA
(Tx power = 18.5dBm) Rx Mode Rx Mode Operating 4.8mA Sleep Mode CLI Commend (Module Master) 11.0uA Deep Sleep Mode CLI Commend (Module Slave) 1.0uA 5 LoRa Module eLR-900H 3) RF Characteristic Parameter Min Typ Max Frequency (MHz) 902.3 TX Frequency Tolerance (KHz) ,
-20
914.9
+20 25 Output Power Max (dBm) Pout 18.5 over RX Receiving Sensitivity Sensitivity -136
(dBm),Conductive
(F=12 ,BW= 125KHz) 6. eLR-900H PIN Assignment 6 LoRa Module eLR-900H 7. ELR-900H PIN Description 7.1 I/O Parameter Description Abbreviation Definition Remarks S I IO O RF Supply pin Input only pin Input / output pin Output only pin Radio RF pin Table 7-1 I/O Parameter Descriptions 7.2. Pin Description PIN PIN Name Functional Description Remark 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 NC PA1 LPUART1_TX LPUART1_RX
I/O O I N.C PA1_GPIO NC PA1 PA2/LPUART1_TX_Commend_ download LPUART1_TX PA3/LPUART1_RX_ Commend_ download LPUART1_RX GND Supply Ground connection UART1_TX UART1_RX SWCLK SWDIO GND SPI1_MOSI SPI1_SCK SPI1_MISO SPI1_NSS GND VREF+
PH0 I/O I/O I I PB6/UART1_TX PB7/UART1_RX SWCLK SWDIO Supply Ground connection I/O I/O I/O I/O Supply Supply
PA7_SPI1_MOSI PA5_SPI1_SCK PA6_SPI1_MISO PA4_SPI1_NSS Ground connection Positive reference voltage N.C GND UART1_TX UART1_RX SWCLK SWDIO GND SPI1_MOSI SPI1_SCK SPI1_MISO SPI1_NSS GND VREF+
PH0 7 LoRa Module eLR-900H VDD 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 VDD GND PB4 PB5 PA8 PA9 GND GND NRST Supply Supply I/O I/O I/O I/O Supply Supply I Supply voltage-3.3V Ground connection PB4_GPIO PB5_GPIO PA8_GPIO PA9_GPIO Ground connection Ground connection Reset (Active Low) VDD_RF RF_Supply RF Supply voltage-3.3V GND PC13 WKUP1 ADC_IN2_VBATT PB8 PA15 I2C1_SCL 12C_SDA WKUP2 BOOT0 GND GND NC GND NC GND NC GND GND RF GND Supply Ground connection I/O I/O I/O I/O I/O I/O I/O I/O
Supply Supply
Supply
Supply
Supply Supply RF I/O Supply PC13_GPIO PB12_WAKE_UP1: Rising Edge, Payload data bit2 PB3_ADC_IN2_VBATT PB8_GPIO PA15_ADC11 PA12_I2C2_SCL PA11_I2C2_SDA PB2/WAKE_UP2 BOOT0(NC) Ground connection Ground connection N.C Ground connection N.C Ground connection N.C Ground connection Ground connection External 50 port for Antenna connection Ground connection 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 8 1) eLR-900H Circuit Module Application Circuit LoRa Module eLR-900H 9 ANTENNA Please perform the antenna design that followed the specifications of the antenna About the signal line between an antenna and a module It is a 50ohm line design. (SMA Reverse) Fine tuning of return loss etc. can be performed using a matching network. However, it is required to check "Class1 change" and "Class2 change"
which the authorities define then. The concrete contents of a check are the following three points. 1) It is the same type as the antenna type of antenna specifications. 2) An antenna gain is lower than a gain given in antenna specifications. 3) The emission level is not getting worse. Antenna gain Electrical Data Frequency Range Impedance V.S.W.R Gain (Peak) Radiation Pattern Polarization Specifications 902.3 ~ 914.9MHz 50 Normal Less Than 1:2.5 0.91dBi OmniDirectional Linear Antenna Specification Antenna Reference Trace Design RF traces from eLR900H module pads pin 47 and ANT1 pin 1 to the antenna must be made using microstrip traces. This microstrip trace must respect the design of the Gerber file associated with the following figures in order to obtain a uniform transmission line with a characteristic impedance of 50 ohms. The reference trace design is shown as the trace along with the side copper filled with vias on the left side. of Figure where components C8, C9 are not installed; they were options on the reference board for future uses;
these uses are not FCC authorized yet. As preliminary information the traces width of all sections are all 0.5mm and the length of eLR900H pad to ANT1 connector are 50mm; However, refer to associated Gerber files for more details on dimensions and refer to eWBM Inc for more details on the Gerber files. Table 1 shows the parts used in the reference trace design. Antenna Reference Trace Design Part Number WR04X0000FTL SMA4RPCB(1.8T) N/A Reference L1 ANT1 C8, C9 Description 0 ohm, 1%
SMA, Subminiature Coaxial Connector 50 ohm Not Installed Manufacture WALSIN Sungjin N/A Antenna Microstrip Trace Parts pink Contetns PCB StackUp and Trace PCB Stack up for the reference board:
PCB StackUp Contetns PCB Trace Test Procedure for ensuring compliance The below test is to be performed both at design verification stage and in production for ensuring compliance. Verify RF power through conducted measurement at junction ANT1 The measured Tx power should be within the datasheet specification for Transmit output power. FCC 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. 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 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. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. The antenna(s) must be installed such that a minimum separation distance of at least 20 cm is maintained between the radiator (antenna) and all persons at all times. antenna. NTEGRATION INSTRUCTIONS The module complies with Part15.247/RSS247. The modular transmitter is only FCC authorized for the specific rule part(i.e, FCC transmitter rules) listed on the grant. The host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host / module combination may also need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The module is authorized with trace antenna design type. And the module is designed to operate with a
(Connector:
/ peak gain: 0.91dBi) The trace antenna design must be performed as specified in the manual. The use of any other antenna or any changes to the reference trace design are subject to additional testing and authorization through a Class II permissive change. The module is a limited singlemodular transmitter that complies with the 15.212(a) modular rules which requires the host operating condition as ; The host product should supply the regulated power of 3.3V DC to module. The power design should be performed as specified in the manual. The module is limited to installation in mobile or fixed applications. At least 20 cm of separation distance between the transmitting antenna device and the user's body must be maintained at all times. The transmitter module must not be colocated or operating in conjunction with any other antenna or transmitter except in accordance with FCC multitransmitter product procedures. The OEM integrator will be responsible to satisfy SAR/ RF Exposure requirements, when the module integrated into the host device. The module is labeled with its own FCC ID certification. If the FCC ID Certification Number are not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. In that case, the final end product must be labeled in a visible area with the following:
"Contains FCC ID: 2ARG9-eLR900H Host User Manual The host manual shall include the following regulatory statement; Part 15.19: 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. Part 15.21: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. The antenna(s) must be installed such that a minimum separation distance of at least 20 cm is maintained between the radiator (antenna) and all persons at all times. SMA-RHelical Host Product labeling The module is labeled with its own FCC ID certification. If the FCC ID Certification Number are not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. In that case, the final end product must be labeled in a visible area with the following:
"Contains FCC ID: 2ARG9-eLR900H