#!/usr/bin/env ruby

require 'uart'

def usage
  puts "Usage: #{$PROGRAM_NAME} <serial_port> [command]"
  exit 1
end

port_spec = ARGV[0]
command = ARGV[1] || 'i'
usage if port_spec.nil? || port_spec.empty?

port_name,baud_rate = port_spec.split(':')
baud_rate = baud_rate.to_i
baud_rate = 115200 unless baud_rate > 0

UART.open port_name, baud_rate, '8N1' do |socket|
  puts '# UART demonstration'
  puts "# client initialised for : #{port_name}"

  socket.write "#{command}\r\n"

  begin
    data = socket.gets
    puts data unless data.chomp.empty?
  end until data.chomp.empty?
end