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Post: Hi Bret The first thing I would suggest is to check that the UART port is configured correctly. The easiest way to do this is to link together pins 8 (TXD) and 10 (RXD) on the Raspberry Pi GPIO header. Do this without the Serial Pi connected. This will make anything sent out of the TXD pin go back into the RXD pin. Next launch minicom using the command "[b]minicom -b 9600 -o -D /dev/ttyAMA0[/b]" if minicom is not installed you can install it using "[b]sudo apt-get install minicom[/b]" If the UART port is working correctly anything you type into the minicom terminal should appear on the screen as it is echoed back into the receive pin. If nothing appears on the screen then there is a problem with the UART configuration and I would suggest going through all of the steps in our knowledge base article again. Once you know that the UART port is working try connecting the Serial Pi board and join the RX and TX pins together next to the 9-pin connector. Repeat the steps above with minicom to check that the Serial Pi is sending and receiving data correctly. If both the UART and Serial Pi are working then that means it is probably a configuration issue with OWW or the serial to 1-wire adapter. It may be worth posting a message on the[url=https://sourceforge.net/p/oww/discussion/296766/] OWW support forum[/url] as the developers of OWW will have a better understanding of how to configure the program to work with a serial to 1-wire adapter.