1pc/2pcs/5pcs/10pcs DIYmall LoRa32u4 433Mhz Lora Development Board IOT RA02 RA-02 Lora Module Long Range 1KM LiPo Atmega328 SX1278 DIY0031

1pc/2pcs/5pcs/10pcs DIYmall LoRa32u4 433Mhz Lora Development Board IOT RA02 RA-02 Lora Module Long Range 1KM LiPo Atmega328 SX1278 DIY0031
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  • Product Code: DIY0031-LoRa32U4 433mhz Lora module
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  • $16.49
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  • 2 or more $14.99

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Tags: LoRa32U4, lora module, Atmega328, SX1278, lora 433Mhz, LORA RA02 RA-02


LoRa32u4 is a light and low consumption board based on the Atmega32u4 and 433MHz LoRA module RA02 from AI-Thinker and an USB battery charging circuit. Ideal for creating long range wireless networks that can exceed 2.4 GHz 802.15.4 and similar, it is more flexible than Bluetooth LE, does not require high power unlike WiFi and offers long range.

The  RA02 LoRa module is fitted with an U.FL (IPX) external antenna connector.
The ATmega32u4 is clocked at 8 MHz and 3.3 V. This chip has 32 K of flash, 2 K of RAM and built-in USB to Serial communication, debugging and programming capabilities without the need for an external FTDI chip, it can also act as an HID device (mouse, keyboard, USB MIDI device, etc).
This board is also equipped with a LiPo and Liion 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.

ATmega32u4 @ 8MHz with 3.3V logic/power
3.3V regulator with 500mA peak current output
USB native support, comes with USB bootloader and serial port debugging
20 GPIOs
Hardware Serial, hardware I2C, hardware SPI support
Built in 100mA lipoly charger with charging status indicator LED
Power/enable pin
4 mounting holes
Reset button
SX1278 RA02 LoRa® based module with SPI interface
8 x PWM pins
10 x analog inputs
Packet radio with ready-to-go Arduino libraries
License-free ISM bands (ITU "Europe" @ 433MHz)
+5 to +20 dBm up to 100 mW Power Output Capability (selectable in software)
~300uA during full sleep
~120mA peak during +20dBm transmit
~40mA during active radio listening.
U.FL (IP) antenna connector

Datasheet MPC73831

Datasheet RA02

Datasheet SX1278

Document link: 

Arduino code link https://github.com/hj91/nodemcu-esp8266/blob/master/lora_sender/lora_sender.ino

NOTE: In the new version of LoRa32u4 (V1.4) the battery monitoring circuit is now active to save power, that mean it has to be enabled before the battery voltage can be measured on ADC channel (9) the battery monitoring ENable is PD5, so PD5 must be set HIGH before he measure voltage with ADC (9) and then PD5 as to be set LOW again, to disable the circuit.  The voltage divider bridge on battery monitoring circuit (to ADC (9), is 100K and 27K, 1%

Package includes:

1 X LoRa32U4 433mhz Lora module (Not include any antenna or plug cable)

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