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- New Device Maps experience with separate Official QBS and Community catalogs. - Browse and search 408 QBS maps by manufacturer and model, with details and register previews. - Purchase and import complete QBS maps securely through Google Play. - Browse, download, and import free Community maps. - Share your current map or a saved CSV with the Community. - Improved purchase recovery, refunds, download reliability, and offline behavior.
Monitor Modbus devices, log data, decode values and run a Modbus TCP server
Monitor, test, and troubleshoot Modbus devices from your Android phone or tablet. Modbus Monitor Advanced is built for engineers and technicians who need more than quick register reads. Monitor multiple communication channels, decode device data, log results, reuse configurations, run a Modbus TCP server, and work with device maps from the field. Monitor multiple connections simultaneously • Poll TCP/IP, USB Serial, and Bluetooth channels at the same time • Monitor PLCs, meters, VFDs, sensors, gateways, and other Modbus devices • Configure reusable monitor points for repeated testing and commissioning Connect wired or wireless • Modbus TCP and UDP over Wi-Fi / Ethernet • Modbus RTU over TCP • Modbus ASCII over TCP • Modbus RTU and ASCII over USB Serial • Modbus RTU and ASCII over Bluetooth Classic / BLE • Enron protocol/addressing option for compatible equipment Client + Server tools • Poll remote Modbus devices in Client mode • Run your Android device as a Modbus TCP Server • Use Client and Server modes together for compatible gateway and testing workflows • Use Sensor Server to expose supported Android sensors through Modbus TCP Advanced data conversion Interpret raw registers as: • Signed and unsigned integers • Hex and binary • 32-bit and 64-bit values • Float and double • BCD • Strings • Unix epoch time • Multiple byte/word orders Apply scaling and convert coded integer values into readable status messages. Write and test • Read and write coils and registers • Use saved write presets for repeatable testing • One-tap preset writes • Configure write behavior by monitor point Logging and configuration • Log data to CSV • Export data at configurable intervals • Import and export monitor-point configurations • Reuse configurations instead of rebuilding register lists • Monitor communication statistics and RX/TX activity Modbus Device Maps Browse device maps by manufacturer and model. • Free Community maps can be browsed, downloaded, and imported • QBS device maps can be previewed and purchased separately through Google Play • Import maps to reduce manual register configuration Always verify register definitions against the documentation for your exact device model and firmware. Optional cloud add-ons Extend Advanced with separately purchased cloud integrations: • MQTT publishing • Google Sheets logging Cloud add-ons require separate in-app purchases and configuration. USB-OTG Serial Supports common USB serial adapters including: • FTDI • Prolific PL2303 • Silicon Labs CP210x • CH34x • STMicro USB-CDC USB serial requires Android USB Host / OTG support. Requirements • Android 6.0 or later • USB Host / OTG support for USB serial connections • Compatible Bluetooth hardware for Bluetooth features • Network access for TCP/IP communication Support & Documentation Website: ModbusMonitor.com Documentation: docs.quantumbitsolutions.com Email: help@modbusmonitor.com