SerialFlow: USB Serial Monitor

SerialFlow is a USB serial monitor and terminal for Android. Connect Arduino, ESP32, STM32 boards, USB-to-serial adapters, GPS modules, sensors, and other embedded hardware directly to your phone or tablet using USB OTG.

Connect a USB serial device directly to your Android phone or tablet, monitor incoming data, send commands, and quickly find the information you need without digging through endless lines of logs.

KEY FEATURES

• USB serial monitoring and two-way data transfer
• Text, Raw and Modbus RTU views
• Fast log search and filtering, including regular expressions
• Hex display and Hex sending
• Configurable baud rate, parity, data bits and stop bits
• DTR and RTS control
• Quick commands for frequently used instructions
• Log export and sharing
• Background connection support
• ESP-IDF and Arduino-ESP32 log highlighting
• NMEA data parsing for GPS devices
• 3D attitude visualization for supported sensor data

SERIALFLOW PRO

Unlock advanced debugging and visualization tools with a one-time purchase:

• Real-time waveform visualization
• GPS satellite diagnostics
• NMEA position map
• Loop Send with custom intervals and repeat counts
• Larger log buffers
• Unlimited Quick Commands
• Remove ads

SerialFlow Pro is a one-time purchase. No subscription and no automatic renewal.

The free version keeps the essential serial workflow available, including USB connection, data monitoring, sending, search and filtering, common decoders, and basic Quick Commands.

Whether you are debugging firmware, inspecting sensor output, testing a GPS module, communicating with a microcontroller, or diagnosing an industrial device, SerialFlow is designed to turn your Android device into a practical portable serial debugging workstation.