Modbus Monitor

Quantum Bit Solutions

About this app

Talk to remote or local Modbus device with easy to Modbus Console. Supports Modbus TCP, Bluetooth/BLE, or RS232/485 Serial Ports. Great for beginners. Try the free version and check out the Advanced version (separate app) when ready!

Learn Modbus or test remote Devices with:

- Modbus TCP
- USB Serial Ports (FTDI, Prolific, Silabs, CH34x)
- Classic Bluetooth Serial Port (SPP)
- Modern Bluetooth Low Energy (BLE Chips - TI CC25x, Microchip, NORDIC)

Read/Write with simple 6 digit address scheme. For examples,
- 400001 reads 1st register with Function Code 3
- 400001.10, reads 10 Registers starting with 1
- 400001 551 = Write 551 to 400001 address (Write)

Choose Modbus Monitor Advanced for even more advanced features such as Sensor Server or File or Cloud Data Logging using Google Spreadsheet.

Help or Feature request: [e-mail]
ModbusMonitor.com

Ratings and reviews

It's a neat idea, but only works about halfway, at best. I could only get it to read integers. floats read as ints, so that's basically non-functional. I could not get it to write anything at all. when reading back the Tx/Rx string, it doesn't even show transmitting the Write value. Awkward overall and minimally useful. good proof of concept to continue to build.

Difficult App, very little documentation. This is all the help for using the API and there are numerous technical errors. No examples of reading or writing to coils, and no clear output of the send message and reply: "The Modbus addresses are polled using the 6-digit address scheme “Xnnnnnn”. The first digit (“X” ) is the standard Modbus address scheme followed by 5-digit Modbus". I did eventually manage to work out how to use the app myself, but it was not easy. Good documentation required.

Thanks.Very useful for an automation engineer.