Adafruit LoRa Radio Bonnet with OLED RFM95W @ 915MHz - RadioFruit
PRODUCT ID: 4074
The latest Raspberry Pi computers come with WiFi and Bluetooth, and now you
can add even more radio options with the Adafruit Radio Bonnets! Upgrade your
Raspberry Pi with a LoRa / LoRaWAN radio, so it can communicate over very long
distances. These bonnets plug right into your Pi and give you long range
wireless capabilities to remote nodes that may be battery powered. Or, you can
create Internet gateways with ease.
You not only get a radio module, but also a 128x32 OLED display for status
messages and three buttons you can use for creating a custom user interface or
sending test messages. All of the above is supported with our Python libraries
so you can send or receive LoRa data with other matching modules, send data to
a LoRaWAN gateway, or even set up your own single channel LoRaWAN-toInternet gateways.
Compared to the 2.4 GHz WiFi/Bluetooth radios on the Pi already, these modules
run at 433 or 900 MHz (sub-GHz). You can't send data as fast but you can send
data a lot farther. These packet radios are simpler than WiFi or BLE, you don't
have to associate, pair, scan, or worry about connections. All you do is send
data whenever you like, and any other modules tuned to that same frequency
(and, with the same encryption key) will receive. The receiver can then send a
reply back. The modules do packetization, error correction and can also autoretransmit so it's not like you have worry about everything but less power is
wasted on maintaining a link or pairing.
These modules are great for use with other microcontrollers with matching
radios (like say our RadioFruit Feathers), say if you want a sensor node network
or transmit data over a campus or town. The trade off is you need two or more
radios, with matching frequencies.
These radio modules come in four variants (two modulation types and two
frequencies) The RFM69's are easiest to work with, and are well known and
understood. The LoRa radios are exciting and more powerful but also more
expensive.
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. These are
+20dBm LoRa packet radios that have a special radio modulation that is not
compatible with the RFM69s but can go much much farther. They can easily go 2
Km line of sight using simple wire antennas, or up to 20Km with directional
antennas and settings tweakings
Packet radio with ready-to-go CircuitPython libraries
Uses the license-free ISM band: "European ISM" @ 868MHz or "American
ISM" @ 915MHz
Use a simple wire antenna or spot for uFL or SMA radio connector
SX1276 LoRa® based module with SPI interface
+5 to +20 dBm up to 100 mW Power Output Capability (power output
selectable in software)
~100mA peak during +20dBm transmit, ~30mA during active radio
listening.
Range of approx. 2Km, depending on obstructions, frequency, antenna
and power output
All radios are sold individually and can only talk to radios of the same part
number. E.g. RFM69 900 MHz can only talk to RFM69 900 MHz, LoRa 433 MHz
can only talk to LoRa 433, etc.
Each bonnet comes fully assembled and ready to go. You can attach an antenna
via the uFL connector, or cut and solder on a small piece of wire (any solid or
stranded core is fine) in order to create your antenna.
TECHNICAL DETAILS
Dimensions: 65.2 x 30.6 x 9mm
Weight: 11g
https://www.adafruit.com/product/4074/1‐23‐19
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