Table:
text: Home automation
Comparison of popular protocols
Comparison of popular protocols
Protocol Power_Line Radio_Frequency Open_Source Needs_Neutral_Wire
C-Bus no yes yes no (uses category-5 UTP)
Insteon yes yes yes Usually
KNX yes yes yes no [ citation needed ]
UPB yes no no no
X10 yes yes yes no
Zigbee no yes yes no [ citation needed ]
Z-Wave no yes no Usually Z-wave list that need Netural

Question: Does it need a neutral if the power line and open source are not suitable for home automation?

Question: Does Zigbee need a neutral wire if home automation open source is yes?

Question: What is the open source of X10 that does not require neutral in home automation?