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Development module LoRa32U4 II - LoRa + ATmega32U4

Weight: Help
8 g

LoRa32u4 II is a light and low consumption board based on the Atmega32u4 with 868MHZ / 915Mhz LoRa module and USB LiPO charging circuit. Max 7KM range in SF8 (full line of sight).

Product is retired

LoRa - Long Range applications

Perfect for creating long range wireless communication that can exceed 2.4 GHz 802.15.4 and similar. Module is more flexible than Bluetooth LE. Does not require high power unlike WiFi and others. Version 868Mhz is suitable for EU countries.

The heart of the module - ATmega32u4 is clocked down to 8 MHz and working at 3.3 V. This chip has 32 KB of flash, 2 KB of RAM. It offers built-in USB to Serial communication, debugging and programming capabilities without the need for an external USB-Serial converter. It can also behave as HID device (mouse, keyboard, USB MIDI device, etc).

This board is equipped with a LiPo and Li-Ion charging circuit and a standard battery interface. It is fully compatible with Arduino. A white user led is tied to pin 13. An orange LED is used for charging status.

Module is based on HPD13 LoRA wireless module, using high-performance, highly integrated RF transceiver chip Semtech SX1276 design. Advanced LoRaTM spread spectrum communication technology to ensure greatly improved communication distance and anti-jamming capability of the module, while achieving a very low current consumption. In the LoRa® mode, the HPD13 provides higher reception sensitivity performance, more robust anti-jamming capability, and improved communication distance and reliability compared to similar transmit and receive modules on the market. In normal (G) FSK mode, it also provides industry-specific receiver sensitivity, as well as very high communication rates.


  • Base module:
    • ATmega32u4 @ 8MHz with 3.3V logic/power
    • 3.3V regulator with 600mA peak current output
    • USB native support, comes with USB bootloader and serial port debugging
    • Built in 100mA (can be set up to 1A by resistor) liPO (lithium polymer) charger with charging status indicator LED
    • Reset button
  • LoRa module:
    • Receive current : 10 ~ 14mA
    • Interface Type: SPI
    • Operating temperature: -40 ° C to + 85 ° C
    • Digital RSSI function
    • Automatic frequency correction
    • Automatic gain control
    • Radio wake-up function
    • Low voltage detection and temperature sensor
    • Fast wakeup with frequency hopping
    • Highly configurable packet handlers
    • Shielded