Strange... Im running 1.6.0beta Ethernet gateway and Domoticz 2.3250 and it works great. @bp_968 A gateway serial log would be best (Domoticz doesnt say that much.) Connect it to a computer and run the serial log on arduino IDE.

Today I had the same experiance with the ESP8266 gateway. Relay sensor and temp sensor working ok but the binary switch sensor did not work. It was correctly added in Domoticz but no status changes. When searching I found this post and build a quick and dirty USB gateway using an arduino Nano, plugged it in my Raspberry PI that runs Domoticz and bingo, it works ! So thanks for your post. One thing I did see in the telnet session to the ESP gateway, there were long numbers (6 digits I believe) at the end of the message were there should be a 0 or 1, indicating the status of the input. The gateway did not crash. Looks like a bug in the ESP gateway.

Thanks as well. I decided to go with this alarm, http://www.ebay.com/itm/like/252094388277?dest=http%3A%2F%2Fwww.ebay.com%2Fitm%2F252094388277, probably more than I needed to pay, but I liked the idea of a strobe alarm.