Data buffering

[admin]

Resident script with sleep time 0, which send whatever data comes from clients and waits for 0.5 sec after each send.

Code:

if not server then
  -- local UDP server on port 5432
  server = require('socket').udp()
  server:settimeout(1)
  server:setsockname('127.0.0.1', 5432)

  -- serial connection
  port = require('serial').open('/dev/RS485', {
    baudrate = 4800,
    parity = 'odd',
    duplex = 'half',
    databits = 8,
    stopbits = 1
  })
end

cmd = server:receive()
if cmd then
  port:write(cmd)
  os.sleep(0.5)
end

Functiont to send data from event scripts.

Code:

function send(cmd)
  require('socket').udp():sendto(cmd, '127.0.0.1', 5432)
end