Class: MideaAirCondition::PacketBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/packet_builder.rb

Overview

This is where we build our packets

Instance Method Summary collapse

Constructor Details

#initialize(security) ⇒ PacketBuilder

Returns a new instance of PacketBuilder.



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# File 'lib/packet_builder.rb', line 6

def initialize(security)
  @security = security
  @command = []

  populate_header_data

  # Maybe this one is the client id
  # In a response it's the device id
  # and the first six bytes are the same
  @packet += [0xc6, 0x79, 0x00, 0x00, 0x00, 0x05, 0x0a, 0x00]

  add_unknown_section
end

Instance Method Details

#add_command(command) ⇒ Object

Raises:

  • (Exception) 


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# File 'lib/packet_builder.rb', line 20

def add_command(command)
  raise Exception, 'Invalid argument' if command.is_a?(Command)
  @command += command.finalize(@security)
end

#add_unknown_section ⇒ Object 



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# File 'lib/packet_builder.rb', line 56

def add_unknown_section
  @packet += [
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x02, 0x00, 0x00, 0x00
  ]
end

#finalize ⇒ Object 



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# File 'lib/packet_builder.rb', line 25

def finalize
  @packet += @command
  @packet << @security.checksum(@command[1..(@command.length - 1)])
  @packet << 0x00

  # Add padding + update packet length
  @packet += [0] * (44 - @command.length)
  @packet += [0]
  @packet[0x04] = @packet.length

  @packet
end

#populate_header_data ⇒ Object 



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# File 'lib/packet_builder.rb', line 38

def populate_header_data
  # was always fix for me except the length byte
  @packet  = [0x5a, 0x5a, 0x01, 0x11, 0x5c, 0x00, 0x20, 0x00]

  # was different for status and power
  # Set Temp
  # @packet += [0x12, 0x00, 0x00, 0x00, 0x6f, 0x33, 0x0c, 0x00]
  # Status
  # @packet += [0x01, 0x00, 0x00, 0x00, 0x8d, 0x0f, 0x17, 0x02]
  # Power
  # @packet += [0x12, 0x00, 0x00, 0x00, 0x6f, 0x33, 0x0c, 0x00]
  # now just use 0x00 * 8
  @packet += [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]

  # was always fix for me
  @packet += [0x0e, 0x03, 0x12, 0x14]
end