Smoke detectors
Posted: 10 May 2021, 09:27
Hey there!
I wanted to build a fire alarm system for my house using wired EI650C smoke detectors.
Those smoke detectors have two wires; if one detects smoke, it gives 5v on the wires.
In addition, if you put 3-5v on the wires, the smoke detector gives an alarm.
So you should be able to either read the alarms as well as send alarms to the other smoke detectors.
Instead of wiring them directly, I want to wire them to Wemos D1 Mini and use ESP Easy to integrate them into my smart home system (domoticz).
So here is what i did:
- connect the GND wire from smoke detector output to GND on Wemos D1 Mini
- connect the other wire from smoke detector output to GPIO16 as well as to GPIO14
- configured devices in ESPEasy as well as in domoticz (one device for reading alarms, one for sending alarms over http)
As long as I have only one wire (GPIO16 or GPIO14) attached, it works - I then can either receive or send alarms. As soon as I connect both, nothing works.
So this seems to be an electronics issue - does anybody know how to solve this?
Best regards,
David
I wanted to build a fire alarm system for my house using wired EI650C smoke detectors.
Those smoke detectors have two wires; if one detects smoke, it gives 5v on the wires.
In addition, if you put 3-5v on the wires, the smoke detector gives an alarm.
So you should be able to either read the alarms as well as send alarms to the other smoke detectors.
Instead of wiring them directly, I want to wire them to Wemos D1 Mini and use ESP Easy to integrate them into my smart home system (domoticz).
So here is what i did:
- connect the GND wire from smoke detector output to GND on Wemos D1 Mini
- connect the other wire from smoke detector output to GPIO16 as well as to GPIO14
- configured devices in ESPEasy as well as in domoticz (one device for reading alarms, one for sending alarms over http)
As long as I have only one wire (GPIO16 or GPIO14) attached, it works - I then can either receive or send alarms. As soon as I connect both, nothing works.
So this seems to be an electronics issue - does anybody know how to solve this?
Best regards,
David