Data Sheet

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LoRa-E5

LoRa Wireless Module - Powered by STM32WE5

Datasheet

V1.0

Summary of content (18 pages)

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Content Content................................................................................................................................................... 2 1 Introduction ...................................................................................................................................... - 3 1.1 Feature .......................................................................................................................................... 3 2 Description ..........................
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1 Introduction LoRa-E5 is a low-cost, ultra-low power, ultra-small size LoRaWAN® module designed by Seeed Technology Co., Ltd. The module uses ST system-level package chip STM32WLE5JC, embedded high-performance LoRa® chip SX126X and ultra-low power Consumption of MCU. The target application of this module is wireless sensor networks and other Internet of Things devices, especially battery-powered low power consumption and longdistance occasions.
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2 Description LoRa-E5 is embedded with high-performance STM32WLE5JC, which is very suitable for the design of various IoT nodes. Based on the development of the multi-mode high-performance SX126X chip, the LoRa-E5 module supports (G) FSK mode and LoRa®. 62.5kHz, 125kHz, 250kHz and 500kHz bandwidth can be used in LoRa® mode. Based on the powerful functions and rich peripherals of STM32WLE5JC, the module provides UART, I2C, SPI, ADC and GPIOs for users to choose according to the application.
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Number Name Type Description 1 VCC - Supply voltage for the module 2 GND - Ground 3 PA13 I SWDIO of SWIM for program download 4 PA14 I/O SWCLK of SWIM for program download 5 PB15 I/O SCL of I2C2 from MCU 6 PA15 I/O SDA of I2C2 from MCU 7 PB4 I/O MCU GPIO 8 PB3 I/O MCU GPIO 9 PB7 I/O UART1_RX from MCU 10 PB6 I/O UART1_TX from MCU 11 PB5 I/O MCU GPIO 12 PC1 I/O MCU GPIO ；LPUART1_TX from MCU 13 PC0 I/O MCU GPIO ；LPUART1_RX from MCU 14 GND - 15 RFIO I
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VCCmr Supply voltage -0.3 +3.9 V Tmr Ambient temperature -40 +85 ℃ Pmr RF input power - +10 dBm 3.2 Normal working conditions Table 3 Recommended Operating Conditions Item Description min max unit VCCop Supply voltage +1.8 +3.6 V Top Ambient temperature -40 +85 ℃ Pop RF input power - +10 dBm 3.3 Module specifications Table 4 LoRa-E5 features ITEMs Structure Parameter Specifications Unit Size 12(W) X 12(L) X 2.5(H) mm Package 28 pins, SMT power supply 3.
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I2C 1 group of I2C, include 2 pins ADC 1 ADC Input, include 1pins,12-bit 1Msps NRST Manual reset pin input SPI 1 group of SPI, include 4 pins 4 Typical RF performance test 4.1 LoRa-E5-LF Performance Testing Figure 3 RF Power vs Voltage（434~510MHz） Figure 4 RF Power VS Temperature（434~510MHz） © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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Figure 5 RF Receiver Sensitivity vs Spreading factor（434~510MHz） Figure 6 RF Receiver Sensitivity VS Temperature（470MHz） © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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4.2 LoRa-E5-HF Performance Testing Figure 9 RF Power vs Voltage（868~928MHz） Figure 10 RF Power VS Temperature（868~928MHz） © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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Figure 11 RF Receiver Sensitivity vs Spreading factor（868~928MHz） Figure 12 RF Receiver Sensitivity VS Temperature（868MHz） © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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Figure 15 Harmonic(1GHz~3GHz)@Frf=868MHz, TXOP=22dBm 5 Application information 5.1 Package information LoRa-E5 has a 28-pin SMD package: Figure 16 LoRa-E5 Module appearance © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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The following figure shows the recommended Layout package dimensions. Figure 17 PCB layout 5.2 External interface of the module In addition to several necessary GPIO ports and a set of SPI ports used for internal RF transceiver control, other GPIOs of the MCU have been derived, including UART (for AT commands), I2C, ADC, etc. For customers who want to develop software on the MCU of the module, these rich GPIO interfaces are very useful for users who need to expand peripherals. 5.
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Figure 18 Reference design based on LoRa-E5 6 LoRaWAN® application information 6.1 LoRaWAN® application The topology of the LoRaWAN® network is a star network, and the gateway acts as a relay between nodes and network servers. The gateway is connected to the network server through a standard IP link, and the node device uses LoRa® or FSK to communicate with one or more gateways. Communication is bidirectional, although it is mainly upstream communication from the node to the network server.
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Figure 19 Design of LoRaWAN® wireless sensor based on LoRa-E5 module 7 Ordering information Technical Support: sensecap@seeed.cc Sales: iot@seeed.cc Table 5 Ordering Information Part Number MCU TX Power (dBm) AT Modem LoRa-E5-LF ROM 256KB / RAM 64KB 10@LF(434MHz) 22@LF (470MHz) Yes LoRa-E5-HF ROM 256KB / RAM 64KB 22@HF (868/915MHz) Yes 8 Reversion V1.0 2020-07-20 First release © 2008-2020 Seeed Technology Co., Ltd. All rights reserved. www.seeedstudio.
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ORIGINAL EQUIPMENT MANUFACTURER (OEM) NOTES The OEM must certify the final end product to comply with unintentional radiators (FCC Sections 15.107 and 15.109) before declaring compliance of the final product to Part 15 of the FCC rules and regulations. Integration into devices that are directly or indirectly connected to AC lines must add with Class II Permissive Change. The OEM must comply with the FCC labeling requirements.
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This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. 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. (2) This device must accept any interference received, including interference that may cause undesired operation.