DESCRIPTION
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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 (RFM95W) 433MHz - our take on an
microcontroller packet radio transceiver with built in USB and battery charging. Its
an Adafruit Feather 32u4 with a 433 MHz radio module cooked in! Great for
making wireless networks that can go much further than 2.4GHz 802.15.4 and
similar, are more flexible than Bluetooth LE and without the high power
requirements of WiFi. We have other boards in the Feather family, check'em out
here.
This is the 433 MHz radio version. We also sell a 900MHz version of the same radio
chipset which can be used for 868 or 915 MHz! And if you don't need LoRa radio,
we have plain 433MHz packet radios as well
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 a RFM95W 433
MHz radio module:
• SX1276 based module with SPI interface
• Packet radio with ready-to-go library
• Uses the license-free ISM bands
• +13 to +20 dBm up to 100 mW Power Output Capability (selectable in
software)
• Simple wire antenna or spot for uFL connector
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 card and USB cable not included but we do have lots of options in the shop
if you'd like!
https://www.adafruit.com/product/3079
4/11/2016
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