LoRa

This is a module for transmitter data using LoRa Radios.

Available for Nerves Project with Semtech SX1276/77/78/79 based boards.

Getting started

Hardware

Example using Raspberry Pi and Adafruit RFM9xx Radio

Installation

The package can be installed in your Nerves Project by adding LoRa to your list of dependencies in mix.exs:

def deps do
  [
    {:lora, "~> 1.0"}
  ]
end

Configure SPI

Can be set the parameters of SPI and GPIO pin for the reset of radio.

standard values: spi: "spidev0.0", spi_speed: 8_000_000, rst: 25

{:ok, lora_pid} = LoRa.start_link([spi: "spidev0.1", rst: 27])

Configure Radio

iex> LoRa.begin(lora_pid, 433.0e6)
:ok
iex> LoRa.set_spreading_factor(lora_pid, 8)
:ok
iex> LoRa.set_signal_bandwidth(lora_pid, 62.5e3)
:ok

Sending data

iex> LoRa.send(lora_pid, [value: 10])

Receiveing data

When the radio receives some data it sends a message to the process that started the link.

iex> flush()
{:lora,
 %{
   packet: "hello world",
   rssi: -90,
   snr: 6,
   time: ~U[2020-05-06 21:13:11.161125Z]
 }}
:ok