LoRa-E5 (STM32WLE5JC) Module, ARM Cortex-M4 and SX126x embedded, supports LoRaWAN on EU868 & US915
LoRa-E5 LoRaWAN module is designed with ST system-level package chip STM32WLE5JC, ARM Cortex M4 ultra-low-power MCU and LoRa SX126X. It supports (G)FSK mode and LoRa. 62.5kHz, 125kHz, 250kHz, and 500kHz bandwidth can be used in LoRa® mode, making it suitable for the design of various IoT nodes, supporting EU868 and US915.
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- Ultra-low Power Consumption: as low as 2.1uA sleep current (WOR mode)
- Extremely Compacted Size: 12mm * 12mm * 2.5mm 28 pins SMT
- High Performance: [email protected]/915MHz; -136.5dBm sensitivity for SF12 with 125KHz BW
- Long Distance Use: 158dB link budget
- Wireless Connectivity: Embedded LoRaWAN® protocol, AT command, support global LoRaWAN® frequency plan
- Worldwide Compatibility: wide frequency range; EU868/US915/AU915/AS923/KR920/IN865
- Great Flexibility: For users who want to develop software on the MCU of the module, other GPIOs of the MCU can be easily manipulated, including UART, I2C, ADC, etc. These rich GPIO interfaces are useful for users who need to expand peripherals.
- FCC and CE Certified
- Works for LoRaWAN sensor nodes and any wireless communication application.
- Autonomous Greenhouse Challenge at Wageningen University in the Netherlands
- Smart Poultry Farming in Beijing, China
- Smart Musang King Durian Farming in Pahang, Malaysia
- Sustainable Agriculture | Global IoT Education Initiative in the US, Australia, & Congo, etc.
- Smart High-Mountain Tea Plantation in Sichuan, China
- Smart Sweet Melon Greenhouse and Weather Station in Guangxi, China
- Environmental Monitoring in Stockholm, Sweden
- Data-driven Tourism in Guangdong, China
- Smart Greenhouse Growing Tropical Fruits in the North, in Shandong, China
- Smart Outdoor Triticale Farm in Hebei, China
For more detailed information about how to use LoRa-E5, please visit LoRa-E5 (STM32WLE5JC) Module Wiki.
1. Factory AT Firmware
LoRa-E5 series has a built-in AT command firmware, which supports LoRaWAN Class A/B/C protocol and a wide frequency plan: EU868/US915/AU915/AS923/KR920/IN865. With this AT command firmware, developers can easily and quickly build their prototype or application.
The AT command firmware contains a bootloader for DFU and the AT application. The "PB13/SPI_SCK/BOOT" pin is used to control LoRa-E5 to stay in the bootloader or jump to the AT application. When PB13 is HIGH, the module will jump to AT application after reset, with a default baud rate of 9600. When PB13 is LOW (press the "Boot" button on LoRa-E5 Dev Board or LoRa-E5 mini), the module will stay in the bootloader, and keep transmitting "C" character every 1S at baud rate 115200.
1. Factory AT Firmware is programmed with RDP(Read Protection) Level 1, developers need to remove RDP first with STM32Cube Programmer. Note that regression RDP to level 0 will cause a flash memory mass to erase and the Factory AT Firmware can't be restored again.
2. The "PB13/SPI_SCK/BOOT" pin on the LoRa-E5 module is just a normal GPIO, not the "BOOT0" pin of the MCU. This "PB13/SPI_SCK/BOOT" pin is used in the bootloader of the Factory AT firmware, to decide to jump to APP or stay in bootloader(for DFU). The real "BOOT0" pin doesn't pinout to the module, so developers need to be careful when developing low-power applications.
2. Clock Configuration
TCXO power supply: PB0-VDD_TCXO
32.768KHz crystal oscillator
3. RF Switch
LoRa-E5 module ONLY transmits through RFO_HP:
Receive: PA4=1, PA5=0
Transmit(high output power, SMPS mode): PA4=0, PA5=1
|Core||MCU||ARM Cortex M4|
|Storage||256KB Flash, 64KB SRAM||KB|
|Package||28 pins, SMT|
|Electrical Characteristics||power supply||3.3V type||V|
|sleep current||2.1uA(WDT on)||uA|
|Operation current (Transmitter+MCU)||50mA @10dBm in 434MHz type||mA|
|111mA @22dBm in 470MHz type|
|111mA @22dBm in 868MHz type|
|Operation current (Receiver+MCU)||6.7mA @BW125kHz, 868MHz type||mA|
|6.7mA @BW125kHz, 434MHz type|
|6.7mA @BW125kHz, 470MHz type|
|Output power||10dBm max @434MHz||dBm|
|22dBm max @470MHz|
|22dBm max @868MHz|
|Harmonics||< -36dBm below 1GHz||dBm|
|< -40dBm above 1GHz||dBm|
|UART||3 group of UART, include 2 pins|
|I2C||1 group of I2C, include 2 pins|
|ADC||1 ADC Input, include 1 pins, 12-bit 1Msps|
|NRST||Manual reset pin input|
|SPI||1 group of SPI, include 4 pins|
LEARN AND DOCUMENTS
SHARED BY USERS
Very satisfiedA neat little module that's nice to have MCU and RF integrated on the same silicon, works fine! I'll buy more of them in the future for my IoT projects.
ClarificationJust to be clear, the STM32WL family is NOT a stacked die (STM32 + Semtech SX126x). It is the only monolithic LoRa Wireless MCU on the market today! It incorporates optimized IP from Semtech, similar to the SX126x in the radio portion. It's an awesome device! Enjoy!
STM32 Wireless MCU Applications Manager, Americas