Class: SDN::MQTTBridge

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

Constant Summary collapse

WAIT_TIME = 
0.25
BROADCAST_WAIT = 
5.0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mqtt_uri, port, device_id: "somfy", base_topic: "homie") ⇒ MQTTBridge

Returns a new instance of MQTTBridge.



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# File 'lib/sdn/mqtt_bridge.rb', line 126

def initialize(mqtt_uri, port, device_id: "somfy", base_topic: "homie")
  @base_topic = "#{base_topic}/#{device_id}"
  @mqtt = MQTT::Client.new(mqtt_uri)
  @mqtt.set_will("#{@base_topic}/$state", "lost", true)
  @mqtt.connect

  @motors = {}
  @groups = {}

  @mutex = Mutex.new
  @cond = ConditionVariable.new
  @command_queue = []
  @request_queue = []
  @response_pending = false
  @broadcast_pending = false

  publish_basic_attributes

  uri = URI.parse(port)
  if uri.scheme == "tcp"
    require 'socket'
    @sdn = TCPSocket.new(uri.host, uri.port)
  elsif uri.scheme == "telnet" || uri.scheme == "rfc2217"
    require 'net/telnet/rfc2217'
    @sdn = Net::Telnet::RFC2217.new('Host' => uri.host,
     'Port' => uri.port || 23,
     'baud' => 4800,
     'parity' => Net::Telnet::RFC2217::ODD)
  else
    require 'serialport'
    @sdn = SerialPort.open(port, "baud" => 4800, "parity" => SerialPort::ODD)
  end

  read_thread = Thread.new do
    buffer = ""
    loop do
      begin
        message, bytes_read = SDN::Message.parse(buffer.bytes)
        unless message
          begin
            buffer.concat(@sdn.read_nonblock(64 * 1024))
            next
          rescue IO::WaitReadable
            wait = buffer.empty? ? nil : WAIT_TIME
            if @sdn.wait_readable(wait).nil?
              # timed out; just discard everything
              puts "timed out reading; discarding buffer: #{buffer.unpack('H*').first}"
              buffer = ""
            end
          end
          next
        end
        # discard how much we read
        buffer = buffer[bytes_read..-1]

        src = SDN::Message.print_address(message.src)
        # ignore the UAI Plus and ourselves
        if src != '7F.7F.7F' && !SDN::Message::is_group_address?(message.src) && !(motor = @motors[src.gsub('.', '')])
          motor = publish_motor(src.gsub('.', ''))
          puts "found new motor #{src}"
        end

        puts "read #{message.inspect}"
        follow_ups = []
        case message
        when SDN::Message::PostNodeLabel
          if (motor.publish(:label, message.label))
            publish("#{motor.addr}/$name", message.label)
          end
        when SDN::Message::PostMotorPosition
          motor.publish(:positionpercent, message.position_percent)
          motor.publish(:positionpulses, message.position_pulses)
          motor.publish(:ip, message.ip)
          motor.group_objects.each do |group|
            positions = group.motors.map(&:positionpercent)
            position = nil
            # calculate an average, but only if we know a position for
            # every shade
            if !positions.include?(:nil) && !positions.include?(nil)
              position = positions.inject(&:+) / positions.length
            end

            group.publish(:positionpercent, position)
          end
        when SDN::Message::PostMotorStatus
          if message.state == :running || motor.state == :running
            follow_ups << SDN::Message::GetMotorStatus.new(message.src)
          end
          # this will do one more position request after it stopped
          follow_ups << SDN::Message::GetMotorPosition.new(message.src)
          motor.publish(:state, message.state)
          motor.publish(:last_direction, message.last_direction)
          motor.publish(:last_action_source, message.last_action_source)
          motor.publish(:last_action_cause, message.last_action_cause)
          motor.group_objects.each do |group|
            states = group.motors.map(&:state).uniq
            state = states.length == 1 ? states.first : 'mixed'
            group.publish(:state, state)
          end
        when SDN::Message::PostMotorLimits
          motor.publish(:uplimit, message.up_limit)
          motor.publish(:downlimit, message.down_limit)
        when SDN::Message::PostMotorDirection
          motor.publish(:direction, message.direction)
        when SDN::Message::PostMotorRollingSpeed
          motor.publish(:upspeed, message.up_speed)
          motor.publish(:downspeed, message.down_speed)
          motor.publish(:slowspeed, message.slow_speed)
        when SDN::Message::PostMotorIP
          motor.publish(:"ip#{message.ip}pulses", message.position_pulses) 
          motor.publish(:"ip#{message.ip}percent", message.position_percent)
        when SDN::Message::PostGroupAddr
          motor.add_group(message.group_index, message.group_address)
        end

        @mutex.synchronize do
          signal = @response_pending || !follow_ups.empty?
          @response_pending = @broadcast_pending
          @request_queue.concat(follow_ups)
          @cond.signal if signal
        end
      rescue EOFError
        puts "EOF reading"
        exit 2
      rescue SDN::MalformedMessage => e
        puts "ignoring malformed message: #{e}" unless e.to_s =~ /issing data/
      rescue => e
        puts "got garbage: #{e}; #{e.backtrace}"
      end
    end
  end

  write_thread = Thread.new do
    begin
      loop do
        message = nil
        @mutex.synchronize do
          # got woken up early by another command getting queued; spin
          if @response_pending
            while @response_pending
              remaining_wait = @response_pending - Time.now.to_f
              if remaining_wait < 0
                puts "timed out waiting on response"
                @response_pending = nil
                @broadcast_pending = nil
              else
                @cond.wait(@mutex, remaining_wait)
              end
            end
          else
            sleep 0.1
          end

          message = @command_queue.shift
          unless message
            message = @request_queue.shift
            if message
              @response_pending = Time.now.to_f + WAIT_TIME
              if message.dest == [0xff, 0xff, 0xff]
                @broadcast_pending = Time.now.to_f + BROADCAST_WAIT
              end    
            end
          end

          # spin until there is a message
          @cond.wait(@mutex) unless message
        end
        next unless message

        puts "writing #{message.inspect}"
        @sdn.write(message.serialize)
        @sdn.flush
      end
    rescue => e
      puts "failure writing: #{e}"
      exit 1
    end
  end

  @mqtt.get do |topic, value|
    puts "got #{value.inspect} at #{topic}"
    if topic == "#{@base_topic}/discovery/discover/set" && value == "true"
      # trigger discovery
      @mutex.synchronize do
        @request_queue.push(SDN::Message::GetNodeAddr.new)
        @cond.signal
      end
    elsif (match = topic.match(%r{^#{Regexp.escape(@base_topic)}/(?<addr>\h{6})/(?<property>label|down|up|stop|positionpulses|positionpercent|ip|wink|reset|(?<speed_type>upspeed|downspeed|slowspeed)|uplimit|downlimit|direction|ip(?<ip>\d+)(?<ip_type>pulses|percent)|groups)/set$}))
      addr = SDN::Message.parse_address(match[:addr])
      property = match[:property]
      # not homie compliant; allows linking the positionpercent property
      # directly to an OpenHAB rollershutter channel
      if property == 'positionpercent' && value =~ /^(?:UP|DOWN|STOP)$/i
        property = value.downcase
        value = "true"
      end
      motor = @motors[SDN::Message.print_address(addr).gsub('.', '')]
      is_group = SDN::Message.is_group_address?(addr)
      follow_up = SDN::Message::GetMotorStatus.new(addr)
      message = case property
        when 'label'
          follow_up = SDN::Message::GetNodeLabel.new(addr)
          SDN::Message::SetNodeLabel.new(addr, value) unless is_group
        when 'stop'
          SDN::Message::Stop.new(addr) if value == "true"
        when 'up', 'down'
          SDN::Message::MoveTo.new(addr, "#{property}_limit".to_sym) if value == "true"
        when 'wink'
          SDN::Message::Wink.new(addr) if value == "true"
        when 'reset'
          next unless SDN::Message::SetFactoryDefault::RESET.keys.include?(value.to_sym)
          SDN::Message::SetFactoryDefault.new(addr, value.to_sym)
        when 'positionpulses', 'positionpercent', 'ip'
          SDN::Message::MoveTo.new(addr, property.sub('position', 'position_').to_sym, value.to_i)
        when 'direction'
          next if is_group
          follow_up = SDN::Message::GetMotorDirection.new(addr)
          next unless %w{standard reversed}.include?(value)
          SDN::Message::SetMotorDirection.new(addr, value.to_sym)
        when 'uplimit', 'downlimit'
          next if is_group
          if %w{delete current_position jog_ms jog_pulses}.include?(value)
            type = value.to_sym
            value = 10
          else
            type = :specified_position
          end
          target = property == 'uplimit' ? :up : :down
          follow_up = SDN::Message::GetMotorLimits.new(addr)
          SDN::Message::SetMotorLimits.new(addr, type, target, value.to_i)
        when /^ip\d(?:pulses|percent)$/
          next if is_group
          ip = match[:ip].to_i
          next unless (1..16).include?(ip)
          follow_up = SDN::Message::GetMotorIP.new(addr, ip)
          type = if value == 'delete'
            :delete
          elsif value == 'current_position'
            :current_position
          elsif match[:ip_type] == 'pulses'
            :position_pulses
          else
            :position_percent
          end
          SDN::Message::SetMotorIP.new(addr, type, ip, value.to_i)
        when 'upspeed', 'downspeed', 'slowspeed'
          next if is_group
          next unless motor
          follow_up = SDN::Message::GetMotorRollingSpeed.new(addr)
          message = SDN::Message::SetMotorRollingSpeed.new(addr,
            up_speed: motor.up_speed,
            down_speed: motor.down_speed,
            slow_speed: motor.slow_speed)
          message.send(:"#{property.sub('speed', '')}_speed=", value.to_i)
          message
        when 'groups'
          next if is_group
          next unless motor
          messages = motor.set_groups(value)
          @mutex.synchronize do
            messages.each { |m| @command_queue.push(m) }
            @cond.signal
          end
          nil
      end
      if message
        @mutex.synchronize do
          @command_queue.push(message)
          @request_queue.push(follow_up) unless @request_queue.include?(follow_up)
          @cond.signal
        end
      end
    end
  end
end

Instance Attribute Details

#groups ⇒ Object (readonly)

Returns the value of attribute groups.



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# File 'lib/sdn/mqtt_bridge.rb', line 124

def groups
  @groups
end

#motors ⇒ Object (readonly)

Returns the value of attribute motors.



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# File 'lib/sdn/mqtt_bridge.rb', line 124

def motors
  @motors
end

Instance Method Details

#add_group(addr) ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 601

def add_group(addr)
  addr = addr.gsub('.', '')
  return if @groups.key?(addr)

  publish("#{addr}/$name", addr)
  publish("#{addr}/$type", "Shade Group")
  publish("#{addr}/$properties", "down,up,stop,positionpulses,positionpercent,ip,wink,reset")

  publish("#{addr}/down/$name", "Move in down direction")
  publish("#{addr}/down/$datatype", "boolean")
  publish("#{addr}/down/$settable", "true")
  publish("#{addr}/down/$retained", "false")

  publish("#{addr}/up/$name", "Move in up direction")
  publish("#{addr}/up/$datatype", "boolean")
  publish("#{addr}/up/$settable", "true")
  publish("#{addr}/up/$retained", "false")

  publish("#{addr}/stop/$name", "Cancel adjustments")
  publish("#{addr}/stop/$datatype", "boolean")
  publish("#{addr}/stop/$settable", "true")
  publish("#{addr}/stop/$retained", "false")      

  publish("#{addr}/positionpulses/$name", "Position from up limit (in pulses)")
  publish("#{addr}/positionpulses/$datatype", "integer")
  publish("#{addr}/positionpulses/$format", "0:65535")
  publish("#{addr}/positionpulses/$unit", "pulses")
  publish("#{addr}/positionpulses/$settable", "true")

  publish("#{addr}/positionpercent/$name", "Position (in %)")
  publish("#{addr}/positionpercent/$datatype", "integer")
  publish("#{addr}/positionpercent/$format", "0:100")
  publish("#{addr}/positionpercent/$unit", "%")
  publish("#{addr}/positionpercent/$settable", "true")

  publish("#{addr}/ip/$name", "Intermediate Position")
  publish("#{addr}/ip/$datatype", "integer")
  publish("#{addr}/ip/$format", "1:16")
  publish("#{addr}/ip/$settable", "true")

  publish("#{addr}/wink/$name", "Feedback")
  publish("#{addr}/wink/$datatype", "boolean")
  publish("#{addr}/wink/$settable", "true")
  publish("#{addr}/wink/$retained", "false")

  publish("#{addr}/state/$name", "State of the motors; only set if all motors are in the same state")
  publish("#{addr}/state/$datatype", "enum")
  publish("#{addr}/state/$format", SDN::Message::PostMotorStatus::STATE.keys.join(','))

  @groups[addr] = Group.new(self, addr)
  publish("$nodes", (["discovery"] + @motors.keys.sort + @groups.to_a).join(","))
end

#enqueue(message, queue = :command) ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 410

def enqueue(message, queue = :command)
  @mutex.synchronize do
    queue = instance_variable_get(:"#{@queue}_queue")
    unless queue.include?(message)
      queue.push(message)
      @cond.signal
    end
  end
end

#publish(topic, value) ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 402

def publish(topic, value)
  @mqtt.publish("#{@base_topic}/#{topic}", value, true)
end

#publish_basic_attributes ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 420

def publish_basic_attributes
  publish("$homie", "v4.0.0")
  publish("$name", "Somfy SDN Network")
  publish("$state", "init")
  publish("$nodes", "discovery")

  publish("discovery/$name", "Discovery Node")
  publish("discovery/$type", "sdn")
  publish("discovery/$properties", "discover")

  publish("discovery/discover/$name", "Trigger Motor Discovery")
  publish("discovery/discover/$datatype", "boolean")
  publish("discovery/discover/$settable", "true")
  publish("discovery/discover/$retained", "false")

  subscribe("discovery/discover/set")
  subscribe("+/label/set")
  subscribe("+/down/set")
  subscribe("+/up/set")
  subscribe("+/stop/set")
  subscribe("+/positionpulses/set")
  subscribe("+/positionpercent/set")
  subscribe("+/ip/set")
  subscribe("+/wink/set")
  subscribe("+/reset/set")
  subscribe("+/direction/set")
  subscribe("+/upspeed/set")
  subscribe("+/downspeed/set")
  subscribe("+/slowspeed/set")
  subscribe("+/uplimit/set")
  subscribe("+/downlimit/set")
  subscribe("+/groups/set")
  (1..16).each do |ip|
    subscribe("+/ip#{ip}pulses/set")
    subscribe("+/ip#{ip}percent/set")
  end

  publish("$state", "ready")
end

#publish_motor(addr) ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 460

def publish_motor(addr)
  publish("#{addr}/$name", addr)
  publish("#{addr}/$type", "Sonesse 30 Motor")
  publish("#{addr}/$properties", "label,down,up,stop,positionpulses,positionpercent,ip,wink,reset,state,last_direction,last_action_source,last_action_cause,uplimit,downlimit,direction,upspeed,downspeed,slowspeed,#{(1..16).map { |ip| "ip#{ip}pulses,ip#{ip}percent" }.join(',')},groups")

  publish("#{addr}/label/$name", "Node label")
  publish("#{addr}/label/$datatype", "string")
  publish("#{addr}/label/$settable", "true")

  publish("#{addr}/down/$name", "Move in down direction")
  publish("#{addr}/down/$datatype", "boolean")
  publish("#{addr}/down/$settable", "true")
  publish("#{addr}/down/$retained", "false")

  publish("#{addr}/up/$name", "Move in up direction")
  publish("#{addr}/up/$datatype", "boolean")
  publish("#{addr}/up/$settable", "true")
  publish("#{addr}/up/$retained", "false")

  publish("#{addr}/stop/$name", "Cancel adjustments")
  publish("#{addr}/stop/$datatype", "boolean")
  publish("#{addr}/stop/$settable", "true")
  publish("#{addr}/stop/$retained", "false")

  publish("#{addr}/positionpulses/$name", "Position from up limit (in pulses)")
  publish("#{addr}/positionpulses/$datatype", "integer")
  publish("#{addr}/positionpulses/$format", "0:65535")
  publish("#{addr}/positionpulses/$unit", "pulses")
  publish("#{addr}/positionpulses/$settable", "true")

  publish("#{addr}/positionpercent/$name", "Position (in %)")
  publish("#{addr}/positionpercent/$datatype", "integer")
  publish("#{addr}/positionpercent/$format", "0:100")
  publish("#{addr}/positionpercent/$unit", "%")
  publish("#{addr}/positionpercent/$settable", "true")

  publish("#{addr}/ip/$name", "Intermediate Position")
  publish("#{addr}/ip/$datatype", "integer")
  publish("#{addr}/ip/$format", "1:16")
  publish("#{addr}/ip/$settable", "true")

  publish("#{addr}/wink/$name", "Feedback")
  publish("#{addr}/wink/$datatype", "boolean")
  publish("#{addr}/wink/$settable", "true")
  publish("#{addr}/wink/$retained", "false")

  publish("#{addr}/reset/$name", "Recall factory settings")
  publish("#{addr}/reset/$datatype", "enum")
  publish("#{addr}/reset/$format", SDN::Message::SetFactoryDefault::RESET.keys.join(','))
  publish("#{addr}/reset/$settable", "true")
  publish("#{addr}/reset/$retained", "false")

  publish("#{addr}/state/$name", "State of the motor")
  publish("#{addr}/state/$datatype", "enum")
  publish("#{addr}/state/$format", SDN::Message::PostMotorStatus::STATE.keys.join(','))

  publish("#{addr}/last_direction/$name", "Direction of last motion")
  publish("#{addr}/last_direction/$datatype", "enum")
  publish("#{addr}/last_direction/$format", SDN::Message::PostMotorStatus::DIRECTION.keys.join(','))

  publish("#{addr}/last_action_source/$name", "Source of last action")
  publish("#{addr}/last_action_source/$datatype", "enum")
  publish("#{addr}/last_action_source/$format", SDN::Message::PostMotorStatus::SOURCE.keys.join(','))

  publish("#{addr}/last_action_cause/$name", "Cause of last action")
  publish("#{addr}/last_action_cause/$datatype", "enum")
  publish("#{addr}/last_action_cause/$format", SDN::Message::PostMotorStatus::CAUSE.keys.join(','))

  publish("#{addr}/uplimit/$name", "Up limit (always = 0)")
  publish("#{addr}/uplimit/$datatype", "integer")
  publish("#{addr}/uplimit/$format", "0:65535")
  publish("#{addr}/uplimit/$unit", "pulses")
  publish("#{addr}/uplimit/$settable", "true")

  publish("#{addr}/downlimit/$name", "Down limit")
  publish("#{addr}/downlimit/$datatype", "integer")
  publish("#{addr}/downlimit/$format", "0:65535")
  publish("#{addr}/downlimit/$unit", "pulses")
  publish("#{addr}/downlimit/$settable", "true")

  publish("#{addr}/direction/$name", "Motor rotation direction")
  publish("#{addr}/direction/$datatype", "enum")
  publish("#{addr}/direction/$format", "standard,reversed")
  publish("#{addr}/direction/$settable", "true")

  publish("#{addr}/upspeed/$name", "Up speed")
  publish("#{addr}/upspeed/$datatype", "integer")
  publish("#{addr}/upspeed/$format", "6:28")
  publish("#{addr}/upspeed/$unit", "RPM")
  publish("#{addr}/upspeed/$settable", "true")

  publish("#{addr}/downspeed/$name", "Down speed, always = Up speed")
  publish("#{addr}/downspeed/$datatype", "integer")
  publish("#{addr}/downspeed/$format", "6:28")
  publish("#{addr}/downspeed/$unit", "RPM")
  publish("#{addr}/downspeed/$settable", "true")

  publish("#{addr}/slowspeed/$name", "Slow speed")
  publish("#{addr}/slowspeed/$datatype", "integer")
  publish("#{addr}/slowspeed/$format", "6:28")
  publish("#{addr}/slowspeed/$unit", "RPM")
  publish("#{addr}/slowspeed/$settable", "true")

  publish("#{addr}/groups/$name", "Group Memberships")
  publish("#{addr}/groups/$datatype", "string")
  publish("#{addr}/groups/$settable", "true")

  (1..16).each do |ip|
    publish("#{addr}/ip#{ip}pulses/$name", "Intermediate Position #{ip}")
    publish("#{addr}/ip#{ip}pulses/$datatype", "integer")
    publish("#{addr}/ip#{ip}pulses/$format", "0:65535")
    publish("#{addr}/ip#{ip}pulses/$unit", "pulses")
    publish("#{addr}/ip#{ip}pulses/$settable", "true")

    publish("#{addr}/ip#{ip}percent/$name", "Intermediate Position #{ip}")
    publish("#{addr}/ip#{ip}percent/$datatype", "integer")
    publish("#{addr}/ip#{ip}percent/$format", "0:100")
    publish("#{addr}/ip#{ip}percent/$unit", "%")
    publish("#{addr}/ip#{ip}percent/$settable", "true")
  end

  motor = Motor.new(self, addr)
  @motors[addr] = motor
  publish("$nodes", (["discovery"] + @motors.keys.sort + @groups.keys.sort.to_a).join(","))

  sdn_addr = SDN::Message.parse_address(addr)
  @mutex.synchronize do
    @request_queue.push(SDN::Message::GetNodeLabel.new(sdn_addr))
    @request_queue.push(SDN::Message::GetMotorStatus.new(sdn_addr))
    @request_queue.push(SDN::Message::GetMotorLimits.new(sdn_addr))
    @request_queue.push(SDN::Message::GetMotorDirection.new(sdn_addr))
    @request_queue.push(SDN::Message::GetMotorRollingSpeed.new(sdn_addr))
    (1..16).each { |ip| @request_queue.push(SDN::Message::GetMotorIP.new(sdn_addr, ip)) }
    (0...16).each { |g| @request_queue.push(SDN::Message::GetGroupAddr.new(sdn_addr, g)) }

    @cond.signal
  end

  motor
end

#subscribe(topic) ⇒ Object 



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# File 'lib/sdn/mqtt_bridge.rb', line 406

def subscribe(topic)
  @mqtt.subscribe("#{@base_topic}/#{topic}")
end