Class: Itiscold

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

Defined Under Namespace

Modules: WebServer Classes: DataHeader, DeviceInfo

Constant Summary collapse

VERSION = 
'1.0.2'

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tty) ⇒ Itiscold

Returns a new instance of Itiscold.



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

def initialize tty
  @tty = tty
end

Class Method Details

.open(filename, speed = 115200) ⇒ Object 



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# File 'lib/itiscold.rb', line 11

def self.open filename, speed = 115200
  f = UART.open filename, speed

  temp = new f

  # Try reading the version a few times before giving up
  temp
end

Instance Method Details

#clear_data! ⇒ Object 



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# File 'lib/itiscold.rb', line 134

def clear_data!
  self.device_params = device_info
end

#close ⇒ Object 



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# File 'lib/itiscold.rb', line 97

def close
  @tty.close
end

#data_body(station, page) ⇒ Object 



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# File 'lib/itiscold.rb', line 183

def data_body station, page
  buf = retry_comm(1) do
    @tty.write with_checksum([0x33, station, 0x2, page]).pack('C5')
    @tty.read
  end
  temps = buf.unpack("Cn#{(buf.bytesize - 2) / 2}C")
  temps.shift # header
  temps.pop   # checksum
  temps.map { |t| t / 10.0 }
end

#data_header(station) ⇒ Object 



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# File 'lib/itiscold.rb', line 171

def data_header station
  buf = retry_comm(1) do
    @tty.write with_checksum([0x33, station, 0x1, 0x0]).pack('C5')
    @tty.read 11
  end
  _, sample_count, start_time, check = buf.unpack 'CnA7C'

  check_checksum check, checksum(buf.bytes.first(buf.bytesize - 1))

  DataHeader.new sample_count, unpack_datetime(start_time)
end

#device_info ⇒ Object 



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# File 'lib/itiscold.rb', line 44

def device_info
  val = nil

  loop do
    if @tty.wait_writable
      @tty.write with_checksum([0xCC, 0x00, 0x06, 0x00]).pack('C5')
    else
      raise "Couldn't open tty for writing"
    end

    if @tty.wait_readable(2)
      val = @tty.read 160
      break
    end
  end

  _,            # C set number
  station_no,   # C station number
  _,            # C
  model_no,     # C model number
  _,            # C
  rec_int_h,    # C record interval hour
  rec_int_m,    # C record interval min
  rec_int_s,    # C record interval sec
  upper_limit,  # n upper limit
  lower_limit,  # s> lower limit
  last_online,  # A7 (datetime)
  ws,           # C work status
  start_time,   # A7 (datetime)
  sb,           # C stop button
  _,            # C
  sample_count, # n number of records
  current_time, # A7 (datetime)
  ,    # A100
  number,       # A10
  delaytime,    # C
  tone_set,     # C
  alrm,         # C
  tmp_unit,     # C
  temp_calib,   # C temp calibration
  _,            # A6 padding
  check,        # C padding
  = val.unpack('C8ns>A7CA7CCnA7A100A10C5A6C')
  check_checksum check, checksum(val.bytes.first(val.bytesize - 1))
  DeviceInfo.new station_no, model_no,
    (rec_int_h * 3600 + rec_int_m * 60 + rec_int_s),
    upper_limit / 10.0, lower_limit / 10.0, unpack_datetime(last_online),
    work_status(ws), unpack_datetime(start_time), allowed_decode(sb),
    sample_count, unpack_datetime(current_time), , number,
    delay_time_decode(delaytime), allowed_decode(tone_set), alrm, temp_unit_decode(tmp_unit),
    temp_calib / 10.0
end

#device_params=(values) ⇒ Object 



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# File 'lib/itiscold.rb', line 101

def device_params= values
  data = [
    0x33, # C
    values.station_number, # C
    0x05, 0x00,            # CC
  ] + split_time(values.sample_interval) + # CCC
  [
    (values.upper_limit * 10).to_i & 0xFFFF, # n
    (values.lower_limit * 10).to_i & 0xFFFF, # s>
    values.new_station_number || values.station_number, # C
    allowed_encode(values.stop_button), # C
    delay_time_encode(values.delay_time), # C
    allowed_encode(values.tone_set), # C
    values.alarm, # C
    temp_unit_encode(values.temp_unit), # C
    (values.temp_calibration * 10).to_i, # C
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 # C6
  ]

  loop do
    if @tty.wait_writable
      @tty.write with_checksum(data).pack('CCCCCCCns>CCCCCCCC6C')
    else
      raise "Couldn't open tty for writing"
    end

    if @tty.wait_readable(2)
      @tty.read 3
      break
    end
  end
end

#flush ⇒ Object 



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# File 'lib/itiscold.rb', line 210

def flush
  Termios.tcflush @tty, Termios::TCIOFLUSH
end

#samples ⇒ Object 



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# File 'lib/itiscold.rb', line 194

def samples
  info    = device_info
  header  = data_header info.station_number
  records = header.sample_count
  page    = 0
  list    = []
  while records > 0
    samples = data_body info.station_number, page
    records -= samples.length
    list    += samples
    page    += 1
  end
  st = header.start_time
  list.map.with_index { |v, i| [st + (i * info.sample_interval), v] }
end

#set_device_number(station_number, dev_number) ⇒ Object 



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# File 'lib/itiscold.rb', line 138

def set_device_number station_number, dev_number
  str = dev_number.bytes.first(10)
  str.concat([0x00] * (10 - str.length))
  data = [ 0x33, station_number, 0x0b, 0x00 ] + str

  retry_comm(1) do
    @tty.write with_checksum(data).pack("C#{data.length + 1}")
    @tty.read 3
  end
end

#set_device_time!(time = Time.now, station_number = device_info.station_number) ⇒ Object 



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# File 'lib/itiscold.rb', line 160

def set_device_time! time = Time.now, station_number = device_info.station_number
  data = [0x33, station_number, 0x07, 0x00] + encode_datetime(time)

  retry_comm(1) do
    @tty.write with_checksum(data).pack("C4nC6")
    @tty.read 3
  end
end

#set_user_info(info, station_number = device_info.station_number) ⇒ Object 



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# File 'lib/itiscold.rb', line 149

def  info, station_number = device_info.station_number
  str = info.bytes.first(100)
  str.concat([0x00] * (100 - str.length))
  data = [ 0x33, station_number, 0x09, 0x00 ] + str

  retry_comm(1) do
    @tty.write with_checksum(data).pack("C#{data.length + 1}")
    @tty.read 3
  end
end