USB-RS232 Sniffer is a serial communication diagnostic tool that simultaneously monitors the two lines of the serial port (TX, RX), showing in a console the flow of messages (questions and answers).

This is compatible only with devices that comply with the Android USB host API, when the Android device is in USB host mode, acts as a USB host, powers the bus and lists the connected USB devices. The USB host mode is compatible with Android 3.1 and higher.

By default all Android devices come with USB host mode disabled, to activate them follow the following steps: Menu> Settings> About the device (About phone or tablet)> Compilation number (Click on the number 4-8 times until a message tells you that you have already become a developer)> Return to Settings> Unlock Options Developer> Enable the USB Debug option.

Compatible Android Devices:
Google Nexus 7
Motorola Xoom
Motorola Moto G
Samsung Galaxy Tab 10.1 GT-P7510
Samsung Galaxy S4 GT-I9505
Samsung Galaxy J1 ACE
Samsung Galaxy ACE 4NEO
Sony Xperia Active
Sony Xperia Z
Lenovo K900 (H-3-01
Acer A510
ASUS Zenfone


Compatible USB-Serial Devices:
FT232R
FT231X
FT232H
FT2232D
FT2432H
PL2303 Prolific
CP210x UART Bridge
CDC / ACM serial servicesC

Mode of use:
For the correct use of the USB-RS232 Sniffer follow the following steps:
1.- First of all verify that the USB-RS232 or USB-UART adapter is disconnected from the Android device

2.- Launch the USB-RS232 Sniffer App

3.- Only when the main screen of the app is shown connect the USB adapter, after being connected, some messages will be displayed requesting the authorization for the use of the USB port, please accept them
 
4.- If you make any changes to the configuration, please disconnect the adapter, close the application and go back to step 1

Connection Mode:
To use this app it is necessary to have a USB-RS232 or USB-UART double adapter, in which you only have to connect the pin (RX), to the TX and RX lines of the serial bus you want to sniff