LoRa-E5 mini (STM32WLE5JC) Dev Board, LoRaWAN protocol and worldwide frequency supported Custom PCB pcba asic sensor pcba customize

• Full GPIOs led out from the Lora-E5 STM32WLE5JC

• Global LoRaWAN® and LoRa frequency plan supported

• Long-distance transmission range to 10km (ideal value in open area)

• Mini and compact size, suitable for rapid testing and building small size prototype

• Convenient RESET and BOOT buttons on board

There is a built-in USB to UART function on board, you could connect the LoRa-E5 mini to your PC with a USB type C cable, and use serial communication software to send AT commands and read data from the board.

For example, connect LoRa-E5 mini to Seeeduino XIAO and the Expansion Board via UART, and send AT commands and read data from Seeeduino XIAO through Arduino IDE serial monitor.

Develop your own LoRa development board with MCU function by using STM32Cube Programmer, which is the SDK officially provided by STMicroelectronics. To download this SDK resource, please find the resources inlearning and documentdown below.

With all the outstanding features listed above, the LoRa-E5 mini will be a superior choice for IoT device development, testing, prototyping, and applications in long-distance, ultra-low power consumption IoT scenarios like smart agriculture, smart office, and smart industry.

If you are unfamiliar withLoRa and LoRaWAN technology, please check out this blog LoRapedia in detail.

 

Hardware Overview

Applications

• LoRa-E5 module Easy testing

• Rapid small-dimension prototyping of LoRa devices with LoRa-E5

• Any long-distance wireless communication application development

• LoRa and LoRaWAN application learn and research

Application Note

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, users 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.

 

Attention

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

   2.1 HSE

 

• 32MHz TCXO

• TCXO power supply: PB0-VDD_TCXO

 

    2.2 LSE

 

• 32.768KHz crystal oscillator

3. RF Switch

LoRa-E5 module ONLY transmits through RFO_HP:

• Receive: PA4=1, PB5=0

• Transmit(high output power, SMPS mode): PA4=0, PB5=1

Specifications

Parameters	Specifications
size	50*23mm
voltage - supply	3.7V - 5V
power - output	up to +20.8 dBm at 3.3V
working frequency	868/915MHz
protocol	LoRaWAN
sensitivity	-116.5 dBm ~ -136 dBm
interfaces	USB Type C / 2P-2.54mm Hole / 1*12P-2.54mm Header*2 / SMA-K / IPEX
modulation	LoRa, (G)FSK, (G)MSK, BPSK
working temperature	-40℃ ~ 85℃
current	LoRa-E5 module sleep current as low as 2.1uA (WOR mode)

 

 

Part List:

LoRa-E5 mini *1

Antenna(EU868/US915) *1

USB TypeC (20cm) *1

Sticker *1

1X12pin male pin headers *2