What's New

minor bug fixes

App Description

Modbus TCP Server and RTU Slave simulates Modbus Holding, Input and Output registers 0 to 65535 according to Modbus specification 1.1b3. 
Simulate Modbus devices to facilitate software development and observe raw data exchange between TCP server and client or RTU master and slave..
Simulate error replies, timeouts and delays.
Supports up to 8 simultaneous client connections and unlimited Modbus transactions.

iPhone Screenshots

(click to enlarge)

Modbus Server Pro screenshot 1

App Changes

  • June 13, 2014 Initial release
  • October 04, 2015 New version 3.4
  • June 15, 2019 New version 3.92
  • June 15, 2019 Price increase: $3.99 -> $4.99
  • June 25, 2019 New version 3.93
  • October 27, 2020 New version 3.94
  • December 10, 2020 New version 4.0
  • August 06, 2021 New version 4.01
  • August 06, 2021 Price increase: $4.99 -> $6.99
  • September 16, 2023 New version 4.05
  • September 16, 2023 Price increase: $6.99 -> $11.99

Other Apps From Control Technologies Pty Ltd

Scout Record Book vToolLite S7 Monitor Pro vToolFree EchoHam SerialTools ModbusClient vToolPro S7 Monitor QuickSMS Ham Rotator Modbus TCP Client Modbus RTU Slave Modbus RTU Master Modbus TCP Server NavPredict