View source for Mihini/modbus

== MODBUS ==

'''Variables'''
 local sched = require 'sched'
 local log = require 'log'
 local modbus=require 'modbus'
 local MODBUS_PORT="/dev/ttyACM0"
 local MODBUS_CONF={ baudRate = 9600 }
 local modbus_client

'''modbus.new(port, cfg, mode) : Creates a new modbus connection.'''

 local function configModbus()
   modbus_client=modbus.new(MODBUS_PORT,MODBUS_CONF,"ASCII")
 end

'''modbusdev:readHoldingRegisters(sid, address, length) Read a sequence of consecutive holding registers'''' 

 local function readModbusData()
  local data=modbus_client:readHoldingRegisters(1,0,5)
    if(data~=nil) then
      local _, Sensor1, Sensor2 = string.unpack(buffer, "h2")
      print(Sensor1..Sensor2)
    end
 end

'''modbusdev:close() '''

'''Main Function'''
  local function main()
    configModbus()
     while(true) do
      sched.wait(3)
       readModbusData()
     sched.wait(3)
   end
 end
  sched.run(main)
  sched.loop()

 sched.run(main)
 sched.loop()