To establish a connection using the RS232 interface, connect your system as shown below using the default parameter.
Please note:
The Avisaro "Box" and "Cube" products come with a preinstalled application script. Thus, the RS232 interface is used to either log data or forward data over a wireless connection. In order to use the RS232 interface to type in configuration settings, the script execution must be switched off. See here for details.
The Avisaro "Module" are shipped with no preinstalled script.
Typically, the RS232 can be tested by connecting the "Box" or "Cube" to a PC using a usual terminal program.