Serial Comm Tester – RS232/485

"Serial Comm Tester – RS232/485" is an Android application designed to test RS232 and RS485 serial communication quickly and easily using your smartphone. With USB OTG support, you can connect serial devices directly to your Android device and perform communication tests without a PC or laptop. It is optimized for on-site testing, maintenance, and basic debugging tasks. USB OTG–Based Serial Communication • Connect your Android device via USB OTG • Works with USB to RS232 / RS485 converters • Perform serial communication tests without additional hardware or PCs RS232 / RS485 Support • Supports widely used industrial serial interfaces • Suitable for equipment inspection, wiring checks, and communication validation • Ideal for field engineers and developers Simple and Intuitive Interface • Clean and straightforward UI for quick testing • Easy to send and receive serial data • Designed for efficient use in industrial environments Fast Communication Testing • Verify communication status in real time • Quickly identify connection or data issues • Useful for initial setup and troubleshooting Recommended For • Field engineers working with RS232 / RS485 devices • Developers testing USB serial communication • PLC, sensor, inverter, and industrial equipment maintenance • Anyone who needs a simple serial testing tool without a PC Typical Use Cases • Checking serial communication after equipment installation • Troubleshooting communication issues on site • Testing serial data transmission during development • Using a smartphone as a portable serial test tool ⚠ Notes • Requires an Android device that supports USB OTG • A USB to RS232 / RS485 converter is required • Behavior may vary depending on the connected converter and device