STM32WL based LoRa-5E development kits go for $19.90 and up

The LoRa-E5 STM32WL module we covered last month can now be found in two LoRaWAN development kits from Seeed Studio with the ultra-compact LoRa-E5 mini board, and the Arduino UNO shaped LoRa-E5 board with more I/Os.

Both boards support the LoRaWAN protocol with global frequencies and can achieve a transmission range of up to 10 km with ultra-low power consumption.

LoRa E5 development boardLoRa-E5 and LoRa-E5 mini specifications:

  • LoRa connectivity
    • LoRa-E5 modules based on STM32WLE5JC SoC with Arm Cortex-M4 MCU @ 48 MHz with 256 KB flash memory, 64 KB SRAM, SX126x LoRa radio
    • Modulations – LoRa, (G)FSK, (G)MSK, BPSK
    • Operating frequencies – 868/915MHz (EU868, US915, AU915, AS923, KR920, IN865)
    • Output power – up to +20.8 dBm at 3.3V
    • Rx sensitivity – -116.5 dBm to -136 dBm
    • Protocol – LoRaWAN
    • SMA-K and IPEX antenna connectors
  • USB – 1x USB Type-C port for power and programming
  • I/Os
    • LoRa-E5 mini – 2x 12-pin through-hole and castellated headers with GPIO, UART, ADC, SPI, I2C, etc.
    • LoRa-E5 devboard
      • Arduino headers (but not fully compatible with Arduino shields)
      • 3x Grove headers (2x I2C, 1x UART)
      • 3-pin RS485 terminal block
      • 5x 4-pin headers for SPI, USART, I2C, USB to TTL, LPUART
  • Misc – Reset and Boot buttons; LoRa-E5 devboard only: 1x user button, configuration jumpers, SWIM/SWD debug header
  • Supply voltage – 5V via USB-C port or ~3.7V battery via 2-pin header (LoRa-E5 mini) or 2-pin JST connector (LoRa-E5 devboard)
  • Power consumption (module) – Sleep current as low as 2.1uA (WOR mode)
  • Dimensions
    • LoRa-E5 mini – 50 x 23mm
    • LoRa-E5 devboard – 85.6 x 54mm
  • Temperature range – -40°C ~ 85°C

LoRa-E5 Mini

The boards ship as kits with an antenna (868 MHz or 915 MHz, a 20cm USB Type-C cable, and a battery holder for two AA batteries. The boards can be controlled by AT commands send over USB to a PC or over UART from another board, or alternatively develop an application with STM32Cube SDK.

LoRa-E5 mini devkit is sold for $19.90, while LoRa-E5 development kit goes for $24.90.  You’ll find schematics and some documentation in the store. That’s quite cheaper than the official NUCLEO-WL55JC1 board offered for $42, but part of the price difference may be attributed to the on-board STLink V3 debugger.

STM32WL LoRa-E5 development kit

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Jeroen
Jeroen
1 month ago

Looks nice, the only problem i have with lorawan is that the thing network is still not good enough here, and there don’t seem to be any lorawan providers for hobbyists/makers, only for companies who release products.

nobitakun
nobitakun
1 month ago

If I’m not mistaken, isn’t there an international company who provides lorawan data for a small monthly fee? I remember something like that a couple of years ago. Check about it, maybe you have coverage within your country 🙂

Drone
Drone
1 month ago

Unless you immediately need a network with global or country-wide coverage, make your own LoRaWAN Network. These are open source. There are probably others: * ChirpStack, open-source LoRaWAN Network Server stack https://www.chirpstack.io/ The ChirpStack open-source LoRaWAN Network Server stack provides open-source components for LoRaWAN networks. Together they form a ready-to-use solution including an user-friendly web-interface for device management and APIs for integration. The modular architecture makes it possible to integrate within existing infrastructures. All components are licensed under the MIT license and can be used for commercial purposes. * The Things Stack https://github.com/TheThingsNetwork/lorawan-stack https://thethingsindustries.com/docs/getting-started/ The Things Stack is an open… Read more »

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