Class: OBD::Connection

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

Instance Method Summary collapse

Constructor Details

#initialize(port, baud = 9600) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/obd/connection.rb', line 3

def initialize port, baud = 9600
  @port = port
  @baud = baud

  connect
end

Instance Method Details

#[](command) ⇒ Object 



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# File 'lib/obd/connection.rb', line 25

def [] command
  OBD::Command.format_result(command, send(OBD::Command.to_hex(command)))
end

#connect ⇒ Object 



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# File 'lib/obd/connection.rb', line 14

def connect
  @serial_port = SerialPort.new @port, @baud # , data_bits: 8, stop_bits: 1, parity: SerialPort::NONE
  @serial_port.read_timeout = 2000
  read
  send("AT E0")    # turn echo off
  send("AT L0")    # turn linefeeds off
  send("AT S0")    # turn spaces off
  send("AT AT2")   # respond to commands faster
  send("AT SP 00") # automatically select protocol
end

#send(data) ⇒ Object 



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# File 'lib/obd/connection.rb', line 29

def send data
  write data
  read
end

#voltage ⇒ Object 



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# File 'lib/obd/connection.rb', line 10

def voltage
  send("AT RV")
end