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xoseperez / espurna

Home automation firmware for ESP8266-based devices
http://tinkerman.cat
GNU General Public License v3.0
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Dual multiway #456

Closed xoseperez closed 6 years ago

xoseperez commented 6 years ago

Originally reported by: kiralikbeyin (Bitbucket: kiralikbeyin, GitHub: kiralikbeyin)

I didint understand how multiway switch works with dual?

Can anybody share connection?

"One and only one on (so if you turn one on all the other will go off, but if you turn that one off again the next in the line will go on)" http://tinkerman.cat/esp8266-multi-relay-boards-sonoff-dual-electrodragon/

xoseperez commented 6 years ago

If you have a device with two (or more) SPST relays using the "one and only one ON" sync setting you force the firmware to check that only one the of the relays are on AND that there is at least one switched on. This - in a two-relay board - will make it behave like a SPDT relay with NO and NC outputs. Just what you need to build a 3-way switch.

You just have to replace one of the two blue boxes in the image below with you device, each of the two lines that connect the two blue boxes will be connected to one of the relays.

300px-3-way_switches_position_2 svg (image from the wikipedia article on multiway switching)

xoseperez commented 6 years ago

I hope the info is what you needed.