Log events to open databases, and send notifications via SMS, email, and voicemail Log data in open format to MS SQL Server, Oracle, mySQL, PostgreSQL, InfluxDB, MongoDB, SQLite, MariaDB, Access, SQL Azure, Amazon Aurora, Amazon RDS, Amazon Redshift, Google Firebase, and CSV files Please send feedback at or fill online form for any suggestions of improvements.The core of the OAS Platform, enabling data connectivity, server-to-server networking, and more For example, the BUILDIN_LED PIN 13 should toggle between 1 and 0 at the Modbus Address "13" or "100013". The sample program uses 9600, 8N1 as default configuration.Ĭlick Start and note the values updates as Analog and Digital value of the Arduino changes. Be sure the COM port and Configuration parameters of Arduino and Modbus Monitor XPF matches. Select and Configure the COM port in the Client (Tab) of the Modbus Monitor Program. Similarly, program Address as 400001 when your program maps A0 to first Holding Register. This address translates to "000003" as the Address value and "BIT" as data type. For example, your program maps Pin 2 to Modbus Address 3 (one-based) of the Coil. Manual Entry: Add Register for each Modbus Address in Arduino Program. Click here on how to use the Online option. Option 1: Pre-configured Modbus Map for this project can be download from Modbus Monitor XPF program's Online window. Read Modbus using the Modbus Monitor XPF or Modbus Monitor Advanced for Android Note the COM port used by Arduino from Windows' Device Manager. See Source on GitHub for complete program.Įxample Read Digital Pin: coilValue = digitalRead( 2 ) //Read Pin 2Įxample Write to Modbus Server Coil: ilWrite( 0, coilValue) //Write value to Modbus ServerĮxample Read Analog Pin: holdingRegisterValue = analogRead( 0 ) //Read A0Įxample Write to Holding Register: ModbusRTUServer.holdingRegisterWrite( 0, holdingRegisterValue) //Write to Modbus Address 0 of Holding RegisterĬonnect Arduino UNO to Computer, compile the program, fix any errors, upload your program. Map Digital Inputs, Digital Output, and Analog Output to Modbus Registers. ModbusRTUServer.begin( StationID, BaudRate ) PinMode(2, INPUT) //Pin 02 = DI //Connect +5V To Turn ONĬonfigure Serial Port and ArduinoModbus Server in Setup section PinMode(3, INPUT) //Pin 03 = DI //Connect +5V To Turn ON PinMode(4, INPUT) //Pin 04 = DI //Connect +5V To Turn ON PinMode(5, INPUT) //Pin 05 = DI //Connect +5V To Turn ON PinMode(6, INPUT) //Pin 06 = DI //Connect +5V To Turn ON PinMode(7, INPUT) //Pin 07 = DI //Connect +5V To Turn ON PinMode(8, INPUT_PULLUP) //Pin 08 = DI //Connect GND To Turn OFF PinMode(9, INPUT_PULLUP) //Pin 09 = DI //Connect GND To Turn OFF PinMode(10, INPUT_PULLUP) //Pin 10 = DI //Connect GND To Turn OFF PinMode(11, INPUT_PULLUP) //Pin 11 = DI //Connect GND To Turn OFF PinMode(12, INPUT_PULLUP) //Pin 12 = DI //Connect GND To Turn OFF PinMode(ledPin, OUTPUT) //Pin 13 = LED with 1k Register Program Arduino UNO as Modbus RTU Server using ArduinoModbus Open Source Modbus Library. Start New Arduino Sketch Program or use example Blink program Source Code of the Arduino Modbus RTU Server Program can be downloaded from GitHub, Modbus-Monitor, ArduinoModbusServer
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