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Adafruit Feather M0 with RFM95 LoRa Radio - 900MHz
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The Feather M0 RFM95 LoRa Radio (900 MHz) combines the ATSAMD21G18 ARM Cortex M0+ processor with an SX1276-based LoRa radio transceiver for long-range wirele...
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The Feather M0 RFM95 LoRa Radio (900 MHz) combines the ATSAMD21G18 ARM Cortex M0+ processor with an SX1276-based LoRa radio transceiver for long-range wireless communication at 868 or 915 MHz. The exact frequency is software-configurable, allowing you to tune dynamically for your region's ISM band. LoRa modulation delivers significantly greater range than conventional packet radio — over 2 km line-of-sight with default settings, and up to 20 km with optimised configurations and directional antennas.
LoRa is ideal for low-power, low-data-rate applications where range matters more than bandwidth. It outperforms 2.4 GHz technologies like Bluetooth, Wi-Fi, and ZigBee in range while maintaining very low sleep current consumption.
Key Features
- ATSAMD21G18 Processor – ARM Cortex M0+ running at 48 MHz, 3.3V logic
- 256 KB Flash + 32 KB RAM – 8× more flash and 16× more RAM than ATmega328/32u4
- RFM95 LoRa 868/915 MHz Radio – SX1276-based LoRa transceiver with SPI interface, software-tuneable frequency
- +5 to +20 dBm Output – Up to 100 mW transmit power, selectable in software
- 2+ km Range – Line-of-sight with default settings; up to 20 km with optimisation
- Ultra-Low Power – ~300 µA full sleep, ~120 mA peak transmit (+20 dBm), ~40 mA active listening
- Native USB – Built-in USB-to-Serial for programming and debugging, no FTDI chip needed
- 20 GPIO Pins – Hardware Serial, I2C, and SPI; 8× PWM, 10× analogue inputs, 1× analogue output
- LiPo Battery Support – JST connector with built-in 100 mA charger, battery voltage monitoring via analogue pin
- Compact Design – 51 mm × 23 mm × 8 mm, weighing 5.8 g
Also Available
- Feather M0 RFM96 LoRa 433 MHz – Same LoRa radio at 433 MHz
- Feather M0 RFM69HCW 868/915 MHz – Packet radio (shorter range, higher data rate)
- Feather M0 RFM69HCW 433 MHz – Packet radio
- Feather M0 Express – CircuitPython with 2 MB flash
- Feather M0 Basic Proto – Prototyping area
- Feather M0 Adalogger – MicroSD data logging
- Feather M0 Bluefruit LE – Bluetooth Low Energy
- Feather M0 WiFi – ATWINC1500 Wi-Fi
Ideal For
- Long-range wireless sensor networks
- Remote environmental monitoring
- Battery-powered IoT nodes requiring kilometre-scale range
- Low-power telemetry and tracking
Package Contents
- 1× Feather M0 RFM95 LoRa 900 MHz
- 1× Header pin set
Note: A wire antenna must be soldered to the board (any solid or stranded core wire will work). LiPo battery and USB cable sold separately.
Jargon buster
Plain-language definitions for the technical terms used above.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- LiPo
- A LiPo (lithium polymer) battery is a rechargeable lithium battery widely used in portable projects because it is light and compact. LiPo cells need correct charging circuitry and careful handling to stay safe, so equipment that supports LiPo generally includes charging or protection hardware suited to that battery type.
- LoRa
- LoRa is a long-range, low-power wireless radio technology often used for telemetry, remote sensors and other links that send small amounts of data over long distances. It is distinct from Bluetooth and WiFi, so sharing a connector or pinout with LoRa hardware does not mean a device actually uses LoRa.
- native USB
- Native USB means the microcontroller itself handles USB communication, rather than using a separate USB-to-serial chip. This matters for programming, debugging, and projects that need the board to act directly as a USB device.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- RAM
- RAM (random-access memory) is fast, temporary memory a device uses for working data while it is running; in its common volatile form, its contents are lost when power is removed. Some devices offer a mode that applies settings to RAM only, which is handy for testing changes temporarily because they are not stored permanently and disappear at power-off.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- Zigbee
- A low-power wireless standard commonly used by smart home sensors, switches, and lights. It matters if you want the board to communicate with Zigbee devices or act as part of a home automation network.
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