What is Modbus Monitor?  
It is a Android app that talks Modbus protocol using several types of interface.  This app polls the Modbus Speaking devices for the data right from your mobile devices.  This app is also able to turn itself into "Server" so any Modbus Master on the network can poll your mobile devices. This app also accesses your devices' sensor data.  This app is also able to use your PC USB Serial Port dongles to talk to your devices (PLC, pressure sensor, temperature controllers, etc) that is not connected to Ehternet or Wi-Fi.  So, the Modbus Monitor is three apps in one: Modbus TCP/UDP Master, Modbus TCP (only) Server, and Modbus RTU/ASCII Master.  

User's Guide or Help?  Click Here

Following video shows the top features of Modbus Monitor.  This video shows how to use the Modbus TCP master, Modbus TCP Server, and Modbus TCP Sensor Server.


Check out this video on using the USB-OTG interface with Modbus Monitor App. The USB serial ports made by Prolific and FTDI are supported but only with specific chipset.  See Android Play store description for details.


Brief Introduction of Sensor Server 
When Modbus TCP Server feature is used, you can specify the the monitor point to get the data from internal server and update it regularly.  This same data will be available on the Modbus TCP Server Network.  The sample is shown in the YouTube video. 


App Features
  • Modbus Functions: FC1, FC2, FC3, FC4, FC5, FC6, FC15, FC16, Write Auto Pick
  • Modbus Address Range: 0 - 65535 (Full Modbus Protocol  Range) 
  • Data Display: Unsigned, Signed, Hex, Binary, Long, Double, Float, String, BCD formats, Unix Epoch Time, Bipolar/Unipolar Analog ADC value conversion
  • Data Import/Export: CSV format from Internal/External Memory or Email (Gmail, Google Drive, Android Email, Yahoo!, MailDroid, K-9, Aqua Mail, etc)
  • Pro Communication Test Panel: Interval, Inter-Packet Delay, Link-Timeout, Actual RX/TX Counts

Modbus Master / Client Features
  • Protocols: Modbus TCP, Modbus RTU over TCP, Modbus UDP, and Modbus RTU over UDP
  • Packet Sniffer: Transmit and Receive Packets from your device, or turn it Off
  • Talk to Multiple IP Addresses and Protocols (Mix and Match TCP/UDP/etc)
  • Statistics on Analog Values ( min, max, average)

Modbus Slave (Server) Features

Screenshots

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