[mihini-dev] problem on modbus

["He,Yong-Jie" <334627855@xxxxxx>]

Hi,

I am trying to get data via modbus on mihini.

This is the program upload into Arduino:

This is the program running in the mihini:

local sched  = require 'sched'

local modbus = require 'modbus'

local MODBUS_PORT = "/dev/ttyACM0" -- serial port on RaspPi

local MODBUS_CONF = {baudRate = 9600 }

local LOG_NAME = "MODBUS_APP"

local function main()

  log.setlevel("INFO")

log(LOG_NAME, "INFO", "Application started")

modbus_client = modbus.new(MODBUS_PORT, MODBUS_CONF)

log(LOG_NAME, "INFO", "Modbus      - OK")

while true do

local values = modbus_client:readHoldingRegisters(1,0,9)

print(values)

sched.wait(5)

end

  

end

sched.run(main)

sched.loop()

When I run this lua program, this is the output:

Tue Apr 23 15:37:02 2013 MODBUS_APP-INFO: Application started

Tue Apr 23 15:37:02 2013 MODBUS_APP-INFO: Modbus      - OK

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

Tue Apr 23 15:38:03 2013 MODBUS-WARNING: Failure while processing a request: timeout

Can anyone give me some idea?

Best Reagrds

Yong-Jie

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