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Adafruit Industries Adafruit Feather 32u4 RFM95 LoRa Radio 868 or 915 MHz

Art-Nr 5998533
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Description

Feather is the new development board from Adafruit, and like its
namesake it is thin, light, and lets you fly! We designed Feather to
be a new standard for portable microcontroller cores.

This is the Adafruit Feather 32u4 LoRa Radio (RFM9x) - our take on an
microcontroller with a "Long Range (LoRa)" packet radio transceiver
with built in USB and battery charging. Its an Adafruit Feather 32u4
with a 868/915 MHz radio module cooked in! Great for making wireless
networks that can go further than 2.4GHz 802.15.4 and similar, are
more flexible than Bluetooth LE and without the high power
requirements of WiFi.

This is the 900 MHz radio version, which can be used for either 868MHz
or 915MHz transmission/reception - the exact radio frequency is
determined when you load the software since it can be tuned around
dynamically.

At the Feather 32u4's heart is at ATmega32u4 clocked at 8 MHz and at
3.3V logic, a chip setup we've had tons of experience with as it's the
same as the Flora. This chip has 32K of flash and 2K of RAM, with
built in USB so not only does it have a USB-to-Serial program & debug
capability built in with no need for an FTDI-like chip, it can also
act like a mouse, keyboard, USB MIDI device, etc.

To make it easy to use for portable projects, we added a connector for
any of our 3.7V Lithium polymer batteries and built in battery
charging. You don't need a battery, it will run just fine straight
from the micro USB connector. But, if you do have a battery, you can
take it on the go, then plug in the USB to recharge. The Feather will
automatically switch over to USB power when its available. We also
tied the battery thru a divider to an analog pin, so you can measure
and monitor the battery voltage to detect when you need a recharge.

Here's some handy specs! Like all Feather 32u4's you get:

* Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers
soldered in
* Light as a (large?) feather - 5.5 grams
* 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
* You also get tons of pins - 20 GPIO pins
* Hardware Serial, hardware I2C, hardware SPI support
* 8 x PWM pins
* 10 x analog inputs
* Built in 100mA lipoly charger with charging status indicator LED
* Pin #13 red LED for general purpose blinking
* Power/enable pin
* 4 mounting holes
* Reset button

This Feather 32u4 LoRa Radio uses the extra space left over to add an
RFM9x LoRa 868/915 MHz radio module. These radios are not good for
transmitting audio or video, but they do work quite well for small
data packet transmission when you need more range than 2.4 GHz (BT,
BLE, WiFi, ZigBee).

* SX1276 LoRa(R) based module with SPI interface
* Packet radio with ready-to-go Arduino libraries
* Uses the license-free ISM bands (ITU "Europe" @ 433MHz and ITU
"Americas" @ 900MHz)
* +5 to +20 dBm up to 100 mW Power Output Capability (power output
selectable in software)
* ~300uA during full sleep, ~120mA peak during +20dBm transmit,
~40mA during active radio listening.
* Simple wire antenna or spot for uFL connector

Our initial tests with default library settings: over 1.2mi/2Km
line-of-sight with wire quarter-wave antennas. (With setting tweaking
and directional antennas, 20Km is possible).

Comes fully assembled and tested, with a USB bootloader that lets you
quickly use it with the Arduino IDE. We also toss in some headers so
you can solder it in and plug into a solderless breadboard. You will
need to cut and solder on a small piece of wire (any solid or stranded
core is fine) in order to create your antenna. Lipoly battery and USB
cable not included but we do have lots of options in the shop if you'd
like!
more

Specifications

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General information

Manufacturer Adafruit Industries
Product type Electronics module
Item number5998533
Manufacturer no.ada-3078

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Warranty 24 month Bring-in

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Adafruit Industries Adafruit Feather 32u4 RFM95 LoRa Radio 868 or 915 MHz Adafruit Industries Adafruit Feather 32u4 RFM95 LoRa Radio 868 or 915 MHz