MySensors.MySGW

What is it?

An Elixir wrapper around [MySensors] (https://github.com/mysensors/MySensors). specifically mysgw. This allows driving the nrf24 chip directly off the SPI bus on Nerves devices.

Why is it?

The default mysgw configure script doesn't easily allow for cross-compilation. (Something that Nerves requires). A couple source file also need to be patched to allow for Erlang to start the program as a port. See these threads for more info on this:

• https://github.com/mysensors/MySensors/issues/1022
• https://github.com/mysensors/MySensors/pull/1061

Usage and Configuration

# Disable logs
config :my_sensors_mysgw, MySensors.MySGW.Logger, [
  level: false
]

# Configure meta information
config :my_sensors_mysgw, MySensors.MySGW.Logger, [
  level: :info,
  meta: [:some, "cool", 'info']
]

# Don't start the daemon.
config :my_sensors_mysgw, MySensors.MySGW.Application, [
  daemon: false
]
# Start the daemon later: (this is blocking, spawn it)
MySensors.MySGW.start_gw()

# Configure eeprom + config_file location
config :my_sensors_mysgw, MySensors.MySGW, [
  eeprom_file: "/root/mysensors.eeprom",
  config_file: "/root/mysensors.conf"
]

Raspberry Pi

For Raspberry Pi devices you can follow [the guide provided by mysensors] (https://www.mysensors.org/build/raspberry#wiring)

Beaglebone

There is no wiring guide for beaglebone based devices. Wiring is similar to Raspberry Pi. Match the pin names between the radio and beaglebone. You will also need to set my_sensors_mysgw_spi_dev in your mix.exs project config.

def project do
    [
      # ...
      my_sensors_mysgw_spi_dev: "/dev/spidev1.0",
      # ...
    ]
end

CS, CE, Interrupt

You will probably need to configure your the pins outside of spi_dev.

def project do
    [
      # ...
      my_sensors_mysgw_spi_dev: "/dev/spidevStopCopyPastingThings",
      my_sensors_mysgw_irq_pin: 9000,
      my_sensors_mysgw_cs_pin:  9001,
      my_sensors_mysgw_ce_pin:  9002,
      # ...
    ]
end

Usage with my_sensors

If you are running my_sensors on the same device as my_sensors_mysgw:

iex()> MySensors.Gateway.add_transport(MySensors.Transport.TCP, [])

otherwise:

iex()> MySensors.Gateway.add_transport(MySensors.Transport.TCP, [host: 'nerves.local'])

Building this package

The Makefile in this package requires tar and wget when building as a hex package. This is because the MySensors code is a submodule. PRs welcome.

License Information

THe MySensors code is liscensed under GPLv2, the Elixir code is licensed under MIT.