require "al_worker"
require "al_worker_timer"
require "i2c"
require "net/http"
require "uri"
require "json"

ADRS = 0x5c          # LPS25H
NODE = "/dev/i2c-1"  # I2C device node
POST_URI = "http://192.168.1.11/cgi-bin/index.rb?ctrl=data_post"

def to_int16( b1, b2 )
  return (b1 << 8 | b2) - ((b1 & 0x80) << 9)
end

def to_uint24( b1, b2, b3 )
  return (b1 << 16) | (b2 << 8) | b3
end

class Worker1 < AlWorker
  def initialize2()
    @i2c = I2C.create(NODE)
    @i2c.write(ADRS, 0x20, 0x90)

    @timer = Timer.periodic( 60 )
    @timer.run() {
      d = get_data()
      send_data( d )
    }
  end

  def get_data()
    ret = {}
    buf = @i2c.read(ADRS, 5, 0xa8)
    p_cnt = to_uint24(buf.getbyte(2), buf.getbyte(1), buf.getbyte(0))
    ret[:pressure] = p_cnt.to_f / 4096

    t_cnt = to_int16(buf.getbyte(4), buf.getbyte(3))
    ret[:temperature] = 42.5 + t_cnt.to_f / 480

    return ret
  end

  def send_data( data )
    AlWorker.log( data )

    Net::HTTP.post_form(URI.parse(POST_URI), {"data"=>data.to_json})
  end
end

worker1 = Worker1.new()
worker1.daemon()